BDS 6-Inch Radius Arm Lift Kit — Ram 3500 with Factory Rear Air Ride SKU: BDS1724FS | Ram 3500 2019–2024 | 4WD | Diesel | 6" Front / 5" Rear | FOX 2.0 Performance Series | 6-Bolt Indexing Ring | Factory Rear Air Ride Required

A complete 6-inch radius arm suspension lift kit engineered for the 2019–2024 Ram 3500 diesel 4WD — specifically for trucks equipped with the factory OE rear air ride suspension system. Heavy-duty tubular replacement radius arms mount in the factory location with caster adjustment and OE-style rubber bushings. Diesel-specific progressive rate Pro-Ride coil springs provide the 6-inch front lift. A precision transfer case indexing ring and high-clearance transmission crossmember address driveline geometry at this lift height. The rear uses a high-strength steel lift block with a heavy-duty air bag spacer for the factory air ride system and extended U-bolts for a 5-inch rear lift. FOX 2.0 Performance Series shocks front and rear. Supports up to 37-inch tires.

Before ordering: This kit is engineered for Ram 3500 trucks equipped with the factory OE rear air ride suspension system only — it will not fit standard non-air-ride models. Diesel 4WD only. For 2024: only Limited Longhorn, Laramie, Tradesman, Big Horn, and Limited trims are verified in BDS fitment data — confirm your trim before ordering. This kit ships with the standard 6-bolt indexing ring. If your truck has the Aisin heavy-duty 6-speed transmission (8-bolt T-case), select the 8-bolt indexing ring option — the 8-bolt kit also includes an internal shaft seal extension and new shaft seal. Dually or Mega Cab models with the Aisin 8-bolt transmission also require DEF Relocation Kit BDS122409. Manual T-case models require BDS122423. Trucks with a 2-piece rear driveshaft require BDS122406.

Required separately (conditional):

• BDS122409 — DEF Relocation Kit, required for Dually or Mega Cab with Aisin 8-bolt transmission
• BDS122423 — Manual transfer case shifter extension, if equipped with manual T-case
• BDS122406 — Carrier bearing drop, if equipped with 2-piece rear driveshaft (carrier bearing)

Verified Fitment

Component Specifications

Lift Configuration (this SKU):

HD Radius Arms:

Pro-Ride Coil Springs — Front:

Rear Lift — Block with Air Bag Spacer:

T-Case Indexing Ring (this build):

FOX 2.0 Performance Series Shocks (front and rear):

Recommended Tire and Wheel Configurations (trimming may be required):

What Is and Is NOT Included

Included — Front:

• Diesel-specific progressive rate Pro-Ride coil springs (pair)
• HD tubular radius arms (pair)
• Forged drop pitman arm
• Track bar relocation bracket
• Sway bar relocation hardware
• Brake line brackets
• Transfer case indexing ring — 6-bolt standard
• High-clearance transmission crossmember
• FOX 2.0 Performance Series front shocks

Included — Rear:

• High-strength steel 5-inch lift block
• Heavy-duty air bag spacer (for OE air ride system)
• Extended U-bolts
• FOX 2.0 Performance Series rear shocks

Not included (conditional — may be required):

• BDS122409 — DEF Relocation Kit (required for Dually or Mega Cab with Aisin 8-bolt transmission)
• BDS122423 — Manual transfer case shifter extension (required for manual T-case)
• BDS122406 — Carrier bearing drop (required for 2-piece rear driveshaft)
• 8-bolt indexing ring option — if equipped with Aisin heavy-duty 6-speed transmission

This kit will not fit:

• Ram 3500 without factory rear air ride suspension
• Gas engine models
• 2WD models

Critical Compatibility

• Factory rear air ride required: This kit is engineered specifically for Ram 3500 trucks with the factory OE rear air ride suspension system. It will not fit standard non-air-ride models.
• Diesel only: Diesel-specific Pro-Ride coil springs are included. Gas engine models are not supported.
• 2024 trim restriction: Only Limited Longhorn, Laramie, Tradesman, Big Horn, and Limited are verified for the 2024 Ram 3500. Confirm your trim before ordering.
• T-case bolt count — confirm before ordering: This kit ships with the 6-bolt indexing ring as standard. If your Ram 3500 has the Aisin heavy-duty 6-speed transmission, it uses an 8-bolt T-case pattern — select the 8-bolt indexing ring option. The 8-bolt kit also includes an internal shaft seal extension and new shaft seal.
• Dually or Mega Cab with Aisin 8-bolt transmission: These configurations require DEF Relocation Kit BDS122409, sold separately.
• Manual T-case: Requires BDS122423 (manual transfer case shifter extension), sold separately.
• 2-piece rear driveshaft: Requires BDS122406 (carrier bearing drop), sold separately.
• ADAS recalibration: Required after installation. All recalibration costs are the owner's responsibility.

Installation Notes

Professional installation is strongly recommended. This kit is rated Moderate with an estimated installation time of 7–9 hours. A pitman arm puller is the only specialty tool required.

Verify before beginning:

• Factory rear air ride suspension confirmed present
• T-case bolt count confirmed (6-bolt or Aisin 8-bolt)
• Dually or Mega Cab with Aisin 8-bolt transmission — BDS122409 required
• Manual T-case — BDS122423 required
• 2-piece rear driveshaft — BDS122406 required
• 2024 trim confirmed in verified fitment list
• ADAS recalibration appointment scheduled

Professional alignment is required after installation. Refer to the current BDS Suspension installation instructions for SKU BDS1724FS for complete procedures, torque specifications, and component-specific instructions.

The Obsidian Take

The BDS1724FS is the purpose-built 6-inch solution for the 2019–2024 Ram 3500 diesel with factory rear air ride — the companion kit to BDS2106FS on the earlier 2013–2018 platform. Where the standard suspension Ram 3500 uses coil springs or leaf springs in the rear, the factory air ride truck needs the heavy-duty air bag spacer in this kit to maintain OE air suspension function at lifted ride height. Front is the standard radius arm approach: tubular arms, diesel-specific Pro-Ride coil springs, T-case indexing, and FOX 2.0 shocks. The T-case bolt count check is the key pre-order decision: 6-bolt is standard and ships with this SKU; Aisin 8-bolt requires the optional indexing ring plus BDS122409 if it's a Dually or Mega Cab. Pitman arm puller is the only specialty tool — this is a straightforward Moderate installation relative to other BDS 6-inch kits.

This Product Is For You If

• You own a 2019–2024 Ram 3500 diesel 4WD equipped with the factory rear air ride suspension system.
• Your 2024 trim is Limited Longhorn, Laramie, Tradesman, Big Horn, or Limited.
• You have confirmed your T-case is 6-bolt standard or have selected the 8-bolt option for the Aisin transmission.
• Dually or Mega Cab with Aisin 8-bolt: you have sourced BDS122409.
• You want 6 inches of front lift and 5 inches of rear lift that maintains the factory air ride system function.
• You want FOX 2.0 Performance Series shocks with application-specific valving.
• You want up to 37-inch tire clearance.

This Product Is Not For You If

• Your Ram 3500 does not have factory rear air ride suspension — see the standard suspension radius arm or block kit variants for your year.
• Your Ram 3500 has a gas engine.
• Your Ram 3500 is 2WD.
• Your 2024 trim is not in the verified list.
• You have not confirmed your T-case bolt count.
• You want NX2 Nitro Series shocks — see the NX2 variant.
• You want FOX 2.5 Performance Elite Series shocks — see the FOX 2.5 variant.

Product Family Reference

Common Questions

Does this kit work on Ram 3500 trucks without factory rear air ride?
No. This kit is engineered specifically for the factory OE rear air ride system. For standard suspension Ram 3500 trucks, a different BDS kit applies — confirm your suspension type before ordering.

How do I know if my Ram 3500 has factory rear air ride?
Factory rear air ride is an option on certain Ram 3500 configurations. Confirm by checking your build sheet, inspecting the rear suspension for air bags at the axle, or verifying with a dealer.

How do I confirm my T-case bolt count?
Standard Ram 3500 models use a 6-bolt T-case pattern — the included indexing ring fits those. Ram 3500 trucks equipped with the Aisin heavy-duty 6-speed transmission use an 8-bolt T-case pattern and require the 8-bolt indexing ring option. Check your build sheet or have a shop inspect the T-case before ordering.

My truck is a Dually or Mega Cab with the Aisin transmission — what else do I need?
BDS122409 (DEF Relocation Kit) is required. It is sold separately and not included in this kit.

Do I need the carrier bearing drop?
Only if your Ram 3500 has a 2-piece rear driveshaft with a carrier bearing. Confirm your driveshaft configuration — if 2-piece, BDS122406 is required.

What specialty tools do I need?
A pitman arm puller is the only specialty tool listed for this installation.

Does ADAS need to be recalibrated after installation?
Yes. All ADAS sensors require professional recalibration after installation. All recalibration costs are the owner's responsibility.

Manufacturer Data Disclaimer

Fitment, specification, included-component, and installation data for this kit are sourced from BDS Suspension manufacturer documentation and OFAS-verified product data current as of publication. Manufacturer specifications and included components are subject to change without notice; confirm current documentation for this SKU at the time of purchase.

Required Legal, Warning, Fitment, and Return Notices

Fitment Notice: This kit requires the factory OE rear air ride suspension system. It will not fit Ram 3500 models without factory rear air ride. Diesel 4WD only. For 2024, only verified trims are supported — confirm before ordering.

T-Case Notice: This kit ships with a 6-bolt indexing ring. Trucks with the Aisin heavy-duty 6-speed transmission use an 8-bolt T-case pattern and require the 8-bolt indexing ring option, which also includes an internal shaft seal extension and new shaft seal. Dually and Mega Cab models with the Aisin 8-bolt transmission require BDS122409.

ADAS Recalibration Warning: This kit alters vehicle ride height and suspension geometry. All advanced driver assistance system (ADAS) sensors require professional recalibration after installation. Schedule recalibration at an authorized dealer or certified ADAS service center. All recalibration costs are the owner's responsibility.

Installation Warning: Professional installation is strongly recommended. A professional wheel alignment is required after installation.

Tire Fitment Notice: BDS references configurations up to 37 x 13.50-inch tires. Trimming may be required. Buyer is responsible for verifying tire and wheel clearance for their specific vehicle and build.

California Proposition 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Return Policy: All returns require prior authorization from Obsidian Forged Auto Supply — do not ship any product back without a Return Merchandise Authorization (RMA). To request an RMA, contact OFAS at Support@obsidianforgedautosupply.com or 469-407-7538 (Monday–Friday 9am–5pm CST, Saturday 9am–3pm CST) with your order number, product SKU, return reason, and photos. Return requests must be submitted within 90 days of delivery. To qualify, the product must be new, unused, uninstalled, complete with all hardware and included components, and in original manufacturer packaging. Do not write on, tape to, or place shipping labels directly on the manufacturer's product box. Return shipping is the customer's responsibility in all cases. Non-defective returns may be subject to a 15% restocking fee. No restocking fee applies when OFAS shipped the wrong item or the return is due to a verified defect or approved damage claim. Some products — including special-order, electrical, and installed items — may be non-returnable. Return eligibility is also subject to applicable manufacturer and supplier return requirements. Approved refunds are issued to the original payment method within approximately 10 business days of the warehouse receiving and processing the returned product. For damaged, missing, or incorrect shipments, contact OFAS within 48 hours of delivery, retain all packaging, and do not install the product.