engine

Transmission Mount

for 2005 Dodge Viper 8.3L V10 · RWD

Difficulty

Moderate

Time

1.8 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.

Remove and replace the transmission mount on a 2005 Dodge Viper with 8.3L V10 engine, including supporting the transmission, removing mounting hardware, and installing a new mount.

Warnings

⚠️Ensure the vehicle is properly supported on jack stands before working underneath. Never rely solely on a hydraulic jack.

⚠️The transmission weighs over 100 lbs. Ensure adequate support is in place before removing mount bolts to prevent the transmission from dropping.

⚠Work on a level surface only. The low ground clearance and center of gravity on the Viper require stable support.

⚠Allow exhaust components to cool completely before beginning work, as exhaust routing passes near the transmission mount area.

Tools required

Transmission jack or hydraulic jack with wood blockEssential

Jack stands (minimum 2)Essential

Floor jackEssential

Socket set (metric)Essential

Ratchet and extensionsEssential

Torque wrenchEssential

Pry bar

Wheel chocksEssential

Penetrating oil

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

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
Place wheel chocks behind rear wheels
Raise vehicle using floor jack at manufacturer-specified lift points
Support vehicle securely on jack stands at reinforced frame rails
Verify vehicle stability by gently pushing before working underneath
Apply penetrating oil to transmission mount bolts if corrosion is visible and allow to soak for 10-15 minutes

Procedure

1
Locate and inspect transmission mount
Position yourself under the vehicle and locate the transmission mount. The mount is positioned at the rear of the T56 6-speed manual transmission (rear-mounted transaxle) where the transmission tailhousing meets the crossmember. Inspect the mount for cracking, separation, or fluid contamination to confirm replacement is necessary. Note the orientation of the mount and mounting hardware for proper reinstallation.
2
Position transmission jack
Place a transmission jack or hydraulic jack with a wide wood block (minimum 12 inches x 6 inches) under the transmission case at a solid support point. Position the jack slightly forward of the mount location to distribute load across a solid section of the transmission case. Raise the jack until it makes light contact with the transmission but does not lift it. The jack should be ready to support the transmission weight but not yet bearing the load.
3
Remove transmission mount-to-crossmember bolts
Locate the 2 bolts securing the transmission mount to the transmission crossmember. These bolts thread upward through the crossmember into the mount. Remove both bolts completely using a socket and ratchet. Set bolts aside in a clean location for inspection.
Torque spec
Transmission Mount Bolts65 Nm (48 lb-ft)
4
Remove transmission mount-to-transmission bolts
Locate the 2 bolts securing the transmission mount bracket to the transmission tailhousing. These bolts secure the mount bracket directly to the transmission. Remove both bolts completely. The mount may remain in position due to compression load at this point.
Torque spec
Transmission Mount Bolts65 Nm (48 lb-ft)
5
Support transmission and relieve mount load
Slowly raise the transmission jack to lift the transmission approximately 1/2 inch. This transfers the weight from the mount to the jack and relieves compression load. Monitor the transmission angle as you lift; it should rise slightly but remain relatively level. Do not lift excessively as this may stress other driveline components.
6
Remove transmission mount assembly
With the transmission weight now supported by the jack, remove the transmission mount assembly. The mount consists of the rubber isolator bonded between metal brackets. If the mount is stuck due to compression set, use a pry bar between the mount and crossmember to carefully separate it. Remove the mount from the vehicle and inspect the mounting surfaces on both the crossmember and transmission for damage or corrosion.
7
Prepare and position new transmission mount
Unpack the new transmission mount and verify it matches the original in dimensions and bolt hole locations. Clean the mounting surfaces on the crossmember and transmission tailhousing using a wire brush or scraper to remove any rust or debris. Position the new mount between the transmission and crossmember, aligning the bolt holes. The mount orientation should match the original installation noted during removal.
8
Install transmission mount-to-transmission bolts
Thread the 2 mount-to-transmission bolts through the mount bracket and into the transmission tailhousing by hand. Start both bolts before tightening either to ensure proper alignment. Tighten both bolts to the specified torque in a criss-cross pattern to evenly compress the mount.
Torque spec
Transmission Mount Bolts65 Nm (48 lb-ft)
9
Lower transmission onto mount
Slowly lower the transmission jack, transferring the transmission weight from the jack onto the new mount. Lower until the mount is compressed and the transmission is at its normal ride height. Verify the mount compresses evenly and the crossmember bolt holes align properly through the mount. If holes do not align, raise the transmission slightly and reposition the mount.
10
Install transmission mount-to-crossmember bolts
Thread the 2 mount-to-crossmember bolts upward through the crossmember and into the mount bracket by hand. Start both bolts before tightening to ensure proper alignment. Tighten both bolts to the specified torque.
Torque spec
Transmission Mount Bolts65 Nm (48 lb-ft)
11
Remove transmission jack and verify installation
Carefully lower and remove the transmission jack from under the vehicle. Visually inspect all four mount bolts to confirm they are fully tightened and properly seated. Verify the mount is compressed evenly and shows no signs of misalignment or binding. Check that no tools or hardware were left in the work area.

Reassembly

Reassembly is completed as part of the installation steps above
Ensure all four transmission mount bolts are torqued to specification: 65 Nm (48 lb-ft)
Verify the mount compresses evenly under the transmission weight with no signs of binding or misalignment

Verification

Start the engine and verify there is no excessive vibration or noise from the transmission area
With the engine running, shift through all gears (clutch depressed) and listen for abnormal sounds from the mount area
Apply throttle in neutral and verify the transmission does not move excessively; movement should be limited by the new mount
Perform a short test drive and verify smooth operation with no clunking or excessive vibration during acceleration, deceleration, and gear changes
Re-check all mount bolt torque after test drive to confirm no loosening has occurred