{"product_id":"readylift-5-inch-tapered-rear-block-kit-66-2750-ford-f250-super-duty-4wd-1-piece-driveshaft","title":"ReadyLIFT 5.0-Inch Tapered Rear Block Kit | OEM-Style Fabricated Steel | Pinion Angle Correcting Taper + Offset Pin | 1-Piece Driveshaft Only | 2017–2026 Ford F-250 Super Duty 4WD | SKU: 66-2750","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eVerified Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\" class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eYear Range\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eMake\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eModel\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eDrivetrain\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eDriveshaft\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2017–2026\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFord\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4WD only\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e1-piece driveshaft only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eDoes NOT fit:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e2019–2026 Ford F-350 Super Duty\u003c\/strong\u003e — explicitly excluded per ReadyLIFT's product documentation; the 2019+ F-350 geometry is not confirmed for this block\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e2-piece driveshaft applications\u003c\/strong\u003e — the tapered geometry and offset pin in this kit are engineered for 1-piece driveshaft pinion angle correction; 2-piece driveshaft F-250 trucks require a different approach — see ReadyLIFT 66-2741 (4-inch flat block with billet carrier bearing spacer)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFord F-250 Super Duty 2WD — 4WD only\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2016 and earlier Ford F-250 Super Duty — different rear suspension and U-bolt geometry\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eF-350 DRW (Dually) trucks — included U-bolts are not sized for dually axle configurations\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTrucks with aftermarket or factory add-on air spring\/load leveling kits attached to the bump stop tangs — \u003cstrong\u003esee critical compatibility note\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eFactory block variability — net lift may differ:\u003c\/strong\u003e Net lift height gained from this kit will vary based on whether your F-250 has an existing factory rear block installed. Trucks with a factory block will gain less net height than stock-height trucks. Measure your current axle-to-frame height before ordering to confirm expected net gain.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003e1-piece vs. 2-piece driveshaft identification:\u003c\/strong\u003e Look under the truck at the rear driveshaft. A 1-piece driveshaft runs as a single continuous tube from the transfer case output to the rear axle with no intermediate frame mount or carrier bearing. A 2-piece driveshaft has a carrier bearing bracket mounted to a frame crossmember midway along the driveshaft. If you see that bracket, you have a 2-piece driveshaft — order 66-2741 instead.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eComponent Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\" class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePart Number\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e66-2750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBrand\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eReadyLIFT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eApplication\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2017–2026 Ford F-250 Super Duty 4WD — 1-piece driveshaft only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBlock Height\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5 Inches (tapered design)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBlock Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTapered — wedge geometry corrects rear pinion angle at 5-inch block height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBlock Construction\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOEM-style fabricated steel — CNC-formed and precision welded — never from lightweight extrusions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBlock Finish\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-coat — corrosion-resistant for long-term undercarriage exposure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBump Stops\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eIntegrated OEM-style bump stop landing pads — built into the block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOffset Pin\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eIncluded — works with the tapered block geometry to set correct pinion angle orientation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eU-Bolts\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4 long e-coated U-bolts — new, longer than OEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eHardware\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eGrade 10 nuts and washers (8 total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDriveline Spacer\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNot included — tapered block + offset pin corrects geometry on 1-piece driveshaft applications; no carrier bearing spacer needed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAir Bag Compatibility\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNOT compatible with air spring\/load leveling systems attached to bump stop tangs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLift Height\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5 inches nominal — net gain varies based on factory block installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eWarranty\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eReadyLIFT Limited Lifetime Warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eShipping Method\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eUPS Ground — free shipping to Lower 48 (confirm weight with OFAS if time-sensitive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhy tapered — not flat:\u003c\/strong\u003e At 5 inches of rear block height, simply placing a flat block between the axle perch and the leaf spring changes the pinion angle of the rear differential. On a 1-piece driveshaft, the driveshaft runs at a fixed angle from the transfer case output to the rear axle — a change in pinion angle at the axle end creates a driveline angle mismatch that produces vibration at highway speed and accelerates U-joint wear. The tapered geometry of the 66-2750 block counteracts this pinion angle change by wedging the axle back to the correct angular orientation relative to the driveshaft — maintaining driveline geometry without a separate carrier bearing spacer.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhy no billet driveline spacer:\u003c\/strong\u003e The 66-2741 (4-inch flat block, 2-piece driveshaft) includes a billet carrier bearing spacer because the 2-piece driveshaft's carrier bearing must be repositioned when the axle drops. The 1-piece driveshaft application (this kit) has no carrier bearing to reposition — the tapered block geometry and offset pin address the pinion angle correction directly.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhat Is and Is NOT Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\" class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eIncluded\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eNOT Included\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTapered rear lift blocks (2) — e-coated fabricated steel, integrated bump stop landing pads\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBillet driveline\/carrier bearing spacer — not needed for 1-piece driveshaft applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOffset pin (1) — sets correct pinion angle orientation with the tapered block\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAlignment — recommended post-installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLong e-coated U-bolts (4)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eHeadlamp aim adjustment — required post-installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eGrade 10 nuts (8) and washers (8)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eADAS verification — required post-installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eNote on what's not included vs. 66-2741:\u003c\/strong\u003e The 66-2741 (2-piece driveshaft) includes a billet carrier bearing spacer. The 66-2750 (1-piece driveshaft) does not — the tapered design performs the equivalent geometry correction without a separate spacer component. If you receive the 66-2750 and notice there's no driveline spacer, that is correct for this kit.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eCritical Compatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eDriveshaft type is the single most important pre-order check.\u003c\/strong\u003e The 66-2750 is engineered specifically for 1-piece driveshaft geometry correction through its tapered block design and offset pin. Installing a tapered pinion-correcting block on a 2-piece driveshaft application produces incorrect geometry at the carrier bearing — the carrier bearing spacer that the 2-piece application requires is not included because the tapered design assumes a 1-piece driveshaft pinion angle relationship. Confirm your driveshaft type before ordering.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003e1-piece vs. 2-piece summary:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1-piece driveshaft + 5-inch block = \u003cstrong\u003e66-2750 (this kit)\u003c\/strong\u003e — tapered block + offset pin\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2-piece driveshaft + 4-inch block = \u003cstrong\u003e66-2741\u003c\/strong\u003e — flat block + billet carrier bearing spacer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eAir spring\/load leveling exclusion — structural integrity.\u003c\/strong\u003e Same warning as the 66-2741: air spring systems mounted to the bump stop tangs place upward structural load on the tang that it is not designed to carry. ReadyLIFT explicitly states this will void the warranty and can cause bump stop tang failure. The exclusion is absolute — regardless of air bag system brand or mounting configuration.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eF-350 2019+ exclusion.\u003c\/strong\u003e Same as the 66-2741: the 2019+ F-350 geometry is not confirmed for this block. Source documentation explicitly says \"Not for use on 2019-UP F350.\" Do not order for a 2019+ F-350.\u003c\/p\u003e\n\u003cdiv dir=\"ltr\" class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eScenario\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eResult\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2017–2026 F-250 Super Duty 4WD — 1-piece driveshaft\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eConfirmed fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2017–2026 F-250 Super Duty 4WD — 2-piece driveshaft\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDoes NOT fit — order 66-2741 instead\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2019–2026 F-350 Super Duty\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDoes NOT fit — explicitly excluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eF-250 Super Duty 2WD\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDoes NOT fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eF-350 DRW (dually)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNot confirmed — contact OFAS before ordering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eF-250 with factory rear block already installed\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFits — net lift gain less than 5\" depending on factory block height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eF-250 with air spring\/load leveling kit on bump stop tangs\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDoes NOT fit — structural failure risk; warranty voided\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eSkill level:\u003c\/strong\u003e Beginner to intermediate — bolt-on rear block installation. No cutting or welding required.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eTools required:\u003c\/strong\u003e Floor jack and rated stands, basic socket set, torque wrench.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eDriveshaft confirmation — do before ordering:\u003c\/strong\u003e Confirm 1-piece driveshaft by looking for the absence of a carrier bearing mount under the truck. If you see a carrier bearing bracket on the frame midway along the driveshaft, you have a 2-piece — order 66-2741.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eOffset pin orientation — read before installing:\u003c\/strong\u003e The offset pin sets the pinion angle correction direction of the tapered block. Verify orientation per ReadyLIFT's installation instructions before installing the blocks. Installing the tapered blocks in the wrong orientation reverses the pinion angle correction.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eInstallation sequence:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-decimal flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSafely lift and support the vehicle with the rear axle at full droop.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRemove factory U-bolts and lower the rear axle.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRemove factory rear block (if present).\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003ePosition the tapered ReadyLIFT block between the axle perch and the leaf spring — confirm correct taper orientation and offset pin position per installation instructions.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eInstall the long e-coated U-bolts and thread Grade 10 nuts.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLower the axle to ride height.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTorque U-bolts to OEM specification at ride height — not at full droop. Final torque must be applied with the truck's weight on the rear suspension.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003ePost-installation mandatory steps:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-decimal flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eRe-torque U-bolts after 500 miles\u003c\/strong\u003e — blocks settle slightly under initial load cycling.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eAlignment verification\u003c\/strong\u003e — recommended after any rear height change.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eHeadlamp aim adjustment\u003c\/strong\u003e — required per ReadyLIFT installation advisory.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eADAS verification\u003c\/strong\u003e — check all active and passive safety systems for proper function.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhat's the difference between the 66-2750 and the 66-2741?\u003c\/strong\u003e\u003cbr\u003eDriveshaft application and block design. The 66-2741 is a 4-inch flat block with a billet carrier bearing spacer — for 2-piece driveshaft F-250 trucks where the carrier bearing must be repositioned at the new block height. The 66-2750 is a 5-inch tapered block with an offset pin — for 1-piece driveshaft F-250 trucks where the tapered geometry corrects pinion angle directly without a separate carrier bearing spacer. Both are confirmed for 2017–2026 F-250 4WD. Driveshaft type determines which kit is correct for your truck.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhy is there no billet driveline spacer in this kit?\u003c\/strong\u003e\u003cbr\u003eThe 1-piece driveshaft has no carrier bearing to reposition — the carrier bearing spacer in the 66-2741 is only needed for 2-piece driveshaft geometry. On a 1-piece driveshaft, the tapered block design and offset pin correct the pinion angle directly. No separate spacer is needed or appropriate for this application.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eHow do I confirm my F-250 has a 1-piece driveshaft?\u003c\/strong\u003e\u003cbr\u003eLook under the truck at the rear driveshaft. A 1-piece driveshaft runs as a single tube from the transfer case output to the rear axle with no support bracket in between. If you see a carrier bearing mount on the frame partway along the driveshaft, you have a 2-piece driveshaft — order 66-2741 instead.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eMy F-250 has a factory rear block — how much lift will I actually get?\u003c\/strong\u003e\u003cbr\u003eLess than 5 inches. ReadyLIFT explicitly notes that final lift height varies based on the factory block your truck has installed. The net gain is the difference between the factory block height and this kit's 5-inch block. Measure your current axle-to-frame height to estimate net gain before ordering.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eCan I use this block with my air bag load leveling kit?\u003c\/strong\u003e\u003cbr\u003eNo. ReadyLIFT explicitly prohibits use with air spring systems attached to the bump stop tangs — this will void the warranty and can cause structural failure of the bump stop tang.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eDoes the offset pin go on both blocks or just one?\u003c\/strong\u003e\u003cbr\u003eThe offset pin sets the pinion angle orientation of the tapered blocks. Follow ReadyLIFT's installation instructions for correct offset pin positioning — orient both blocks correctly for the intended pinion angle correction.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eThe Obsidian Take\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe 66-2750 is the 1-piece driveshaft counterpart to the 66-2741 — same OEM-style fabricated steel construction, same integrated bump stop landing pads, same Grade 10 hardware, same no-extrusions engineering philosophy, and the same application purpose: restore rake for towing, pair with a leveling kit for a leveled-all-the-way-around stance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe tapered design is the engineering distinction that makes this kit work correctly on the 1-piece driveshaft platform. A flat block at 5 inches rotates the pinion angle forward, creating a driveline angle mismatch that produces highway vibration. The taper in the 66-2750 counteracts that rotation, keeping the axle pinion at the correct angle relative to the 1-piece driveshaft's fixed geometry. The offset pin sets the precise orientation. The result is 5 inches of rear block height with correct driveline geometry — not just height.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe driveshaft identification step is the one check that determines whether this kit or the 66-2741 is correct for your truck. It takes 30 seconds under the truck. A carrier bearing bracket midway along the driveshaft = 2-piece = 66-2741. No carrier bearing bracket = 1-piece = 66-2750. Do it before ordering.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eThis SKU is for:\u003c\/strong\u003e 2017–2026 Ford F-250 Super Duty 4WD owners with confirmed 1-piece driveshaft who want 5 inches of rear block height to restore towing rake, pair with an existing leveling kit, or achieve a leveled stance front and rear — without air bag systems attached to the bump stop tangs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eThis SKU is NOT for:\u003c\/strong\u003e F-350 owners (2019+ explicitly excluded), 2-piece driveshaft F-250 trucks (order 66-2741), F-250 2WD trucks, DRW\/dually configurations without verification, anyone running air spring or load leveling systems on the bump stop tangs, or 2016 and earlier Super Duty owners.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eSAE J2492 Warning\u003c\/strong\u003e\u003cbr\u003e⚠ WARNING: By installing this product, you acknowledge that the suspension of this vehicle has been modified. As a result, this vehicle may handle differently than factory-equipped vehicles. As with any vehicle, extreme care must be used to prevent loss of control or rollover during sharp turns or abrupt maneuvers. Always wear seat belts, and drive safely, recognizing that reduced speeds and specialized driving techniques may be required. Failure to drive this vehicle safely may result in serious injury or death. Do not drive this vehicle unless you are familiar with its unique handling characteristics and are confident of your ability to maintain control under all driving conditions.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eManufacturer Data Disclaimer\u003c\/strong\u003e\u003cbr\u003eProduct specifications, fitment data, and feature details are sourced from ReadyLIFT manufacturer documentation and verified third-party technical references current at the time of publication. ReadyLIFT reserves the right to modify product specifications without notice. Confirm 4WD drivetrain, 1-piece driveshaft, F-350 exclusion, and air bag system compatibility before ordering. OFAS is not responsible for incompatibility resulting from 2-piece driveshaft applications, 2019+ F-350 applications, DRW configurations, incorrect block taper orientation during installation, or bump stop tang failure resulting from air spring system use.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eProp 65 Warning\u003c\/strong\u003e\u003cbr\u003e⚠ WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to \u003ca class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"http:\/\/www.p65warnings.ca.gov\"\u003ewww.p65warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eNon-Returnable Notice\u003c\/strong\u003e\u003cbr\u003eThis item is non-returnable once installed. Verify 4WD drivetrain, 1-piece driveshaft, and air bag system status before ordering. Questions before ordering? Text (469) 407-7538.\u003c\/p\u003e","brand":"ReadyLIFT Suspension","offers":[{"title":"Default Title","offer_id":51631842853185,"sku":"66-2750","price":199.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/1284\/1793\/files\/66-2750.jpg?v=1776289191","url":"https:\/\/obsidianforgedautosupply.com\/products\/readylift-5-inch-tapered-rear-block-kit-66-2750-ford-f250-super-duty-4wd-1-piece-driveshaft","provider":"Obsidian Forged Auto Supply","version":"1.0","type":"link"}