engine

Transmission Mount

for 2007 Ram 3500 5.9L I6 Cummins · 4WD

Difficulty

Moderate

Time

1.7 h

Tools

Steps

✓Fact-checked. Built from OLP's spec database, then independently fact-checked line by line with every correction applied. Master-tech sign-off by Chris Hackleman is queued. Cross-check torque values against the factory manual, and stop if anything looks unsafe. How our data is made.

This procedure covers the removal and replacement of the transmission mount on a 2007 Ram 3500 with the 5.9L Cummins diesel engine and 4WD.

Warnings

⚠️Never work under a vehicle supported only by a jack. Always use jack stands rated for the vehicle weight.

⚠The transmission weighs over 200 lbs when removed. Ensure adequate support before removing mount bolts.

⚠Inspect all mount hardware for damage or wear. Replace as needed to prevent transmission movement.

Tools required

Floor jackEssential

Jack standsEssential

Transmission jack or equivalent supportEssential

Torque wrench (50-150 lb-ft range)Essential

19mm socketEssential

18mm socketEssential

21mm socketEssential

Ratchet and extensionsEssential

Pry bar

Wire brush

Penetrating oil

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Parts

Transmission mount × 1 — Use OEM specification

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Preparation

Park vehicle on level surface and engage parking brake
Chock rear wheels securely
Allow engine and transmission to cool completely if recently operated
Raise vehicle using floor jack and support securely on jack stands under frame rails
Inspect transmission mount area for fluid leaks or damage before beginning work

Procedure

1
Position transmission jack
Place transmission jack or equivalent support under the transmission, contacting a structural area of the case rather than directly on the oil/fluid pan. Use a block of wood between the jack and pan to distribute load. Raise jack until it just contacts the transmission but does not lift it.
2
Support transmission weight
Slowly raise the transmission jack to take the weight off the transmission mount. Lift only enough to relieve pressure on the mount - approximately 1/4 to 1/2 inch. The transfer case, which is present on this 4WD vehicle, should remain stable.
3
Remove crossmember bolts
Locate the crossmember bolts securing the transmission crossmember to the frame rails. Remove all crossmember bolts, verifying the correct count and socket size on your specific vehicle. Apply penetrating oil if bolts are corroded. Keep bolts organized for reinstallation.
Torque spec
Crossmember Bolts95 Nm (70 lb-ft)
4
Remove transmission mount bolts
Using an 18mm socket, remove the transmission mount-to-crossmember bolts (typically 2-3 bolts). Then remove the mount-to-transmission bolts using a 19mm socket. The mount is now free to be removed.
Torque spec
Transmission Mount Bolts65 Nm (48 lb-ft)
5
Lower crossmember and remove mount
Carefully lower the crossmember away from the transmission. Remove the old transmission mount from either the crossmember or transmission, depending on which component it remained attached to. Inspect the crossmember for cracks or damage.
6
Clean mounting surfaces
Use a wire brush to clean all mounting surfaces on the transmission tail housing and crossmember. Remove any rust, dirt, or old rubber residue. Ensure surfaces are flat and free of debris that could prevent proper mount seating.
7
Install new transmission mount
Position the new transmission mount onto the transmission tail housing. Thread the mount-to-transmission bolts by hand to ensure proper alignment. Do not fully tighten at this stage.
8
Raise and align crossmember
Lift the crossmember into position using the transmission jack to adjust height as needed. Align the crossmember bolt holes with the frame rail mounting points. Thread all four crossmember bolts by hand to verify alignment before tightening.
9
Tighten transmission mount bolts
Using a torque wrench and 19mm socket, torque the transmission mount-to-transmission bolts to the Mopar-specified value, and the mount-to-crossmember nuts/bolts to their separately specified value — verify both against the 2007 Ram 3500 service manual as they differ. Follow a cross pattern if multiple bolts are present.
Torque spec
Transmission Mount Bolts65 Nm (48 lb-ft)
10
Tighten crossmember bolts
Using a torque wrench and 21mm socket, torque the crossmember-to-frame bolts to the Mopar-specified value for the 2007 Ram 3500 — verify the bolt count and torque figure against the service manual before tightening. Tighten in a cross pattern (front left, rear right, front right, rear left) to ensure even loading.
Torque spec
Crossmember Bolts95 Nm (70 lb-ft)
11
Remove transmission support
Carefully lower the transmission jack to transfer the transmission weight onto the new mount. Remove the jack and wood block from under the transmission. Verify the transmission sits level and the mount is properly compressed.

Reassembly

Verify all bolts are torqued to specification before lowering vehicle
Inspect surrounding components for any damage that may have occurred during service
Check that no tools or parts were left in the work area

Verification

Lower vehicle to ground and remove jack stands
Start engine and shift through all transmission gears while stationary to verify no excessive movement
Test drive vehicle and check for vibrations or unusual noises from transmission area
Re-inspect all mount bolts after 50-100 miles of driving to ensure they remain tight
Verify no transmission fluid leaks developed during service