Driveshaft - Front

This procedure covers removal and installation of the front driveshaft on a 4WD Dodge Ram 2500 with 5.9L Cummins diesel engine, connecting the transfer case to the front differential.

Warnings

Tools required

Parts

• Driveshaft flange bolts × 8 — Use OEM specification (check if torque-to-yield)
• Transfer case output seal (if leaking) × 1 — Use OEM specification

Fluids

• Mopar ATF+4 (transfer case top-off if needed) — 1 qt

Preparation

1. Park vehicle on level surface and apply parking brake firmly
2. Chock rear wheels securely
3. Raise front of vehicle using floor jack and support with jack stands under frame rails
4. Ensure vehicle is stable and secure before working underneath
5. Allow exhaust system to cool completely if vehicle was recently driven
6. Clean area around driveshaft connections to prevent dirt from entering drivetrain components

Procedure

1. 1

   Mark driveshaft alignment
   Use marking paint or chalk to mark the relationship between the driveshaft and both flanges (front differential yoke and transfer case output yoke). Make clear alignment marks on both the driveshaft flange and mating yoke at each end. This ensures proper phasing during reinstallation and maintains factory balance.
2. 2

   Remove front driveshaft-to-differential flange bolts
   Locate the fasteners connecting the front driveshaft to the front differential pinion yoke. On many of these trucks this is a U-joint retained by two straps/U-bolts; on others it is a flange. Remove the retaining hardware and note the type before removal. If bolts are corroded, apply penetrating oil and allow to soak. Keep hardware organized if reusing (check for torque-to-yield specification requiring new bolts).
   Torque spec

   Driveshaft Flange Bolts (CV/U-Joint)75 Nm (55 lb-ft)
3. 3

   Support driveshaft at center bearing
   Locate the center support bearing bracket mounted to the vehicle crossmember or frame. The front driveshaft is a one-piece shaft connecting the transfer case front output yoke to the front differential yoke; it does not use a center support bearing. Support the weight of the driveshaft with one hand or have an assistant hold it before removing the flange bolts. Support the weight of the driveshaft with one hand or have an assistant hold it before removing bracket bolts.
4. 4

   Remove center support bearing bracket
   This step does not apply. The front driveshaft on this vehicle is a one-piece shaft with no center support bearing bracket to remove.
   Torque spec

   Center Support Bearing Bracket Bolts50 Nm (37 lb-ft)
5. 5

   Remove rear driveshaft-to-transfer case flange bolts
   Locate the fasteners connecting the front driveshaft to the transfer case front output yoke. You may need to rotate the driveshaft to access all fasteners. Remove the retaining hardware, noting whether the joint is a flange or U-joint/strap style and confirming the correct fastener count against OEM specifications.
   Torque spec

   Driveshaft Flange Bolts (CV/U-Joint)75 Nm (55 lb-ft)
6. 6

   Remove front driveshaft assembly
   Carefully lower and remove the complete front driveshaft assembly from the vehicle. The front driveshaft is a single one-piece shaft. Maneuver the assembly out from under the vehicle, being careful not to damage U-joints, CV joint boots, or slip yoke. Maneuver the assembly out from under the vehicle, being careful not to damage U-joints, CV joint boots, or the center bearing seal. Place driveshaft on a clean work surface for inspection.
7. 7

   Inspect driveshaft components
   Thoroughly inspect all U-joints for looseness, roughness, or wear by attempting to move the joints by hand. Check the CV joint (if equipped) for smooth operation and boot condition. Inspect the center support bearing for wear, noise, or roughness by rotating the driveshaft sections. Check all splines for wear or damage. Replace any worn components before reinstallation.
8. 8

   Inspect mating flanges and seals
   Inspect the front differential yoke and transfer case output yoke for wear, cracks, or damage. Check for any leaks around the transfer case output seal or front differential pinion seal. Wire brush any rust or corrosion from flange faces and bolt holes. Replace seals if leaking (requires additional procedures).
9. 9

   Install driveshaft to transfer case
   Lift the front driveshaft assembly into position. First, align the rear section to the transfer case output yoke using your alignment marks. Install the four bolts finger-tight only at this stage. If equipped with a CV joint, ensure the CV joint boot is properly positioned and not pinched or twisted.
10. 10

    Install center support bearing bracket
    This step does not apply. The front driveshaft has no center support bearing bracket to install.
    Torque spec

    Center Support Bearing Bracket Bolts50 Nm (37 lb-ft)
11. 11

    Connect driveshaft to front differential
    Align the front section of the driveshaft to the front differential yoke using your alignment marks. Install the four bolts finger-tight. Verify all alignment marks match at both ends before proceeding to torque specifications.
12. 12

    Torque center support bearing bracket bolts
    This step does not apply. The front driveshaft has no center support bearing bracket to torque.
    Torque spec

    Center Support Bearing Bracket Bolts50 Nm (37 lb-ft)
13. 13

    Torque driveshaft flange bolts
    Torque the four bolts at the transfer case connection to specification in a cross pattern. Then torque the four bolts at the front differential connection to specification in a cross pattern. If torque-to-yield bolts are specified, use new bolts and follow manufacturer torque procedures. Apply medium-strength thread locker to bolt threads if recommended.
    Torque spec

    Driveshaft Flange Bolts (CV/U-Joint)75 Nm (55 lb-ft)
14. 14

    Final inspection
    Verify all bolts are properly torqued and no hardware was left loose. Check that the driveshaft rotates freely without binding when turned by hand. Verify CV joint boots (if equipped) are not damaged or twisted. Ensure adequate clearance exists between driveshaft and exhaust components, frame rails, and crossmembers throughout full suspension travel.

Reassembly

1. Ensure all alignment marks were matched during installation to maintain proper driveshaft phasing
2. Verify all fasteners are torqued to specification using a calibrated torque wrench
3. Check transfer case fluid level and top off with Mopar ATF+4 if any fluid was lost during the procedure

Verification

• Lower vehicle from jack stands
• Start engine and shift transfer case through all positions (2WD, 4HI, 4LO if equipped) to verify engagement
• Test drive vehicle at low speed in a safe area and verify no vibrations, clunks, or unusual noises from driveline
• Check for smooth operation during acceleration, deceleration, and turning
• Recheck all fastener torque after test drive if possible
• Inspect for any fluid leaks around transfer case or front differential output seals after test drive

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