drivetrain

Rear Differential

for 2006 Dodge Viper 8.3L V10 · RWD

Difficulty

Advanced

Time

5.7 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.

Complete removal and replacement of the rear differential assembly on a 2005 Dodge Viper, including driveshaft disconnection, halfshaft removal, differential mounting removal, and refill with proper synthetic gear oil.

Warnings

⚠️Vehicle must be supported on jack stands rated for its weight. Never work under a vehicle supported only by a floor jack.

⚠Differential fluid will drain rapidly once cover is removed. Position drain pan carefully to avoid spills.

⚠The differential assembly weighs approximately 100-120 lbs. Use a transmission jack or have an assistant help support it during removal.

ℹ️Mark driveshaft and differential flange orientation before removal to maintain proper phasing during reinstallation.

⚠Inspect all CV joint boots and halfshaft condition during this procedure. Replace if torn or leaking.

Tools required

Floor jack and jack stands rated for vehicle weightEssential

Torque wrench (50-300 lb-ft range)Essential

1/2 inch drive socket set (metric)Essential

Breaker barEssential

Drain pan (minimum 1 gallon capacity)Essential

Transmission jack or differential jackEssential

Pry bar

Dead blow hammer

Marking paint or punch

Fluid pump for gear oilEssential

Wire brush

Thread locker (medium strength)

Shop ragsEssential

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Parts

Rear differential assembly (if replacing) × 1 — Use OEM specification
Differential cover gasket × 1 — Use OEM specification
Differential mounting bushings (inspect and replace if worn) × 2 — Use OEM specification
Driveshaft u-joint strap bolts (if damaged) × 4 — 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.

Fluids

75W-140 synthetic GL-5 rear differential fluid — 2.75 qt

Preparation

Park vehicle on level surface and engage parking brake.
Loosen rear wheel lug nuts while vehicle is on ground.
Raise rear of vehicle and support securely on jack stands positioned under frame rails.
Remove both rear wheels.
Place drain pan under differential to catch any residual fluid.
Clean exterior of differential housing and surrounding area to prevent contamination during disassembly.

Procedure

1
Mark and disconnect driveshaft
Use marking paint or a center punch to mark the orientation of the driveshaft yoke relative to the differential companion flange. This ensures proper phasing during reassembly. Remove the 4 u-joint strap bolts at the differential end of the driveshaft. Support the driveshaft and slide it rearward to separate it from the differential. Secure the driveshaft out of the way by suspending it with wire or rope to prevent strain on the front universal joint.
Torque spec
Driveshaft U-Joint Straps20 Nm (15 lb-ft)
2
Drain differential fluid
Position drain pan under differential cover. Remove all differential cover bolts and carefully pry the cover loose using a flat pry bar at the designated pry points. Allow all fluid to drain completely into the pan. Remove the cover and old gasket material. Clean the mating surfaces on both the cover and differential housing thoroughly with a wire brush and shop rags.
Torque spec
Differential Cover Bolts35 Nm (26 lb-ft)
3
Remove left halfshaft
Locate the inboard CV joint where the left halfshaft connects to the differential. Remove the CV/companion-flange bolts securing the halfshaft flange to the differential output flange (verify bolt count against the factory service manual). Pull the halfshaft away from the differential and secure it to the suspension or body with wire to prevent it from hanging by the outboard CV joint.
Torque spec
CV Bolts61 Nm (45 lb-ft)
4
Remove right halfshaft
Repeat the process for the right side halfshaft. Remove the CV/companion-flange bolts securing the right halfshaft flange to the differential output flange (verify bolt count against the factory service manual). Pull the halfshaft away from the differential and secure it to prevent strain on the outboard joint.
Torque spec
CV Bolts61 Nm (45 lb-ft)
5
Support differential assembly
Position a transmission jack or differential jack under the center of the differential housing. Raise the jack until it just makes contact and supports the weight of the differential. Ensure the differential is stable on the jack before proceeding.
⚠The differential must be securely supported before removing mounting bolts. Failure to properly support it can result in injury or damage.
6
Remove differential mounting bolts
Locate the differential mounting points where the housing attaches to the subframe or crossmember. Remove the mounting bolts on both sides of the differential. Refer to the factory service manual to identify the exact number and location of differential mounting bolts on the rear subframe assembly. Use a breaker bar if necessary to break loose these fasteners.
7
Lower and remove differential
With all mounting bolts removed and the differential supported on the jack, carefully lower the jack to bring the differential down and away from the vehicle. Guide the differential output flanges clear of the surrounding components. Once lowered sufficiently, roll the jack and differential assembly out from under the vehicle. Note the orientation and position of any shims or spacers at the mounting points for reinstallation.
⚠Move slowly and check clearances continuously. The differential housing may need to be tilted or rotated slightly to clear the body and suspension components.
8
Inspect mounting bushings and hardware
With the differential removed, inspect all mounting bushings for cracks, tears, or excessive wear. Check the condition of mounting hardware and threads. Inspect the differential housing for cracks or damage. If replacing the differential, transfer any necessary brackets or hardware to the replacement unit. Clean all mounting surfaces on the subframe.
ℹ️This is the ideal time to inspect and replace worn mounting bushings, which commonly degrade on high-performance vehicles.
9
Position replacement or serviced differential
Place the differential assembly on the transmission jack and position it under the vehicle. Carefully raise the jack, guiding the differential into position. Align the mounting points with the subframe brackets. Install any shims or spacers in their original positions. Thread in the mounting bolts by hand to ensure proper alignment before tightening.
10
Torque differential mounting bolts
Torque all differential mounting bolts to specification. Tighten bolts evenly, alternating from side to side to ensure the differential seats properly in the mounts. Once all bolts are torqued, remove the transmission jack from under the differential.
11
Reconnect halfshafts
Align the left halfshaft CV joint flange with the differential output flange. Install all 6 CV bolts and tighten to specification in a star pattern. Repeat for the right halfshaft, ensuring proper alignment before installing and torquing bolts. Verify that both halfshafts are fully seated and rotate freely.
Torque spec
CV Bolts61 Nm (45 lb-ft)
12
Reconnect driveshaft
Position the driveshaft yoke to the differential companion flange, aligning the marks made during disassembly. Install the u-joint strap bolts and tighten evenly in a criss-cross pattern to the specified torque. Verify proper driveshaft alignment and that it rotates freely without binding.
Torque spec
Driveshaft U-Joint Straps20 Nm (15 lb-ft)
13
Install differential cover and fill with fluid
Install a new differential cover gasket on the housing. Position the cover and install all cover bolts, tightening them in a star pattern to ensure even gasket compression. Torque bolts to specification. Locate the differential fill plug on the housing (typically on the driver side near the top). Remove the fill plug and use a fluid pump to add the differential fluid of the viscosity and specification listed in the factory service manual (including any required limited-slip friction modifier) until it begins to flow out of the fill hole. Allow excess to drain back, then reinstall the fill plug.
Torque spec
Differential Cover Bolts35 Nm (26 lb-ft)
14
Reinstall wheels and lower vehicle
Install both rear wheels and thread lug nuts by hand. Lower the vehicle until the tires just touch the ground. Torque wheel lug nuts to specification in a star pattern. Fully lower the vehicle and remove jack stands.
Torque spec
Wheel Lug Nuts142.4 Nm (105 lb-ft)

Reassembly

Torque all fasteners to specified values using a calibrated torque wrench.
Ensure driveshaft phasing marks are properly aligned to prevent vibration.
Verify differential fluid level is correct before test driving.
Apply medium-strength thread locker to driveshaft u-joint strap bolts per service manual recommendations.

Verification

Start the engine and allow it to idle. Listen for any unusual noises from the differential area.
With the vehicle on level ground, check under the differential for any fluid leaks at the cover or output flanges.
Test drive the vehicle at various speeds, checking for smooth operation, proper engagement, and absence of vibration or noise.
After test drive, recheck differential fluid level and top off if necessary.
Inspect all connections and torqued fasteners one final time after the test drive.