Pilot Bearing

Replace the pilot bearing in a 2008 Dodge Viper 8.4L V10 by removing the transmission, clutch assembly, and extracting the pilot bearing from the crankshaft, then installing a new bearing.

Warnings

Tools required

Parts

• Pilot bearing × 1 — Use OEM specification
• Transmission fluid drain plug gasket × 1 — Use OEM specification

Fluids

• transmission_manual — 4.2 qt

Preparation

1. Park vehicle on level ground and engage parking brake
2. Disconnect negative battery cable
3. Allow engine and exhaust system to cool completely if recently driven
4. Raise vehicle and support securely on jack stands at all four corners
5. Remove rear wheels to improve access and reduce weight
6. Have transmission fluid ready for refill after reassembly

Procedure

1. 1

   Drain transmission fluid
   Position drain pan under transmission. Locate the drain plug on the transmission case (verify exact location for the T56 in this application). Remove the drain plug and allow fluid to drain completely. Remove the fill plug on the side of the transmission to allow complete drainage and to verify refill access later.
2. 2

   Disconnect driveshaft
   Mark the relationship between the driveshaft and differential flange for correct reinstallation alignment. Remove the bolts securing the driveshaft to the rear differential flange (verify exact count and size against OEM specification). Support the driveshaft and slide it rearward to separate the front yoke from the transmission output shaft. Lower the driveshaft and remove it from under the vehicle. The Viper uses a single-piece driveshaft with no center support bearing; support the driveshaft fully during removal.
3. 3

   Remove exhaust components
   Disconnect and remove exhaust components as necessary to gain clearance around the transmission and clutch slave cylinder area (verify the Viper's side-exit exhaust routing and required disconnection points). The exhaust must be moved to provide adequate clearance for transmission removal.
4. 4

   Disconnect clutch hydraulic line
   Locate the clutch slave cylinder mounted to the transmission bellhousing. Disconnect the hydraulic line from the slave cylinder. Have a catch container ready as some fluid will drain. Cap or plug the line to prevent further fluid loss and contamination. The slave cylinder will remain attached to the transmission during removal.
5. 5

   Disconnect electrical connections and shifter
   Disconnect all electrical connectors from the transmission, including the reverse light switch and any speed sensors. Remove the shifter assembly (accessed from the cabin by removing the console/boot on the Viper's top-mounted shifter) and disconnect it from the transmission per OEM procedure. Mark all connections for proper reassembly.
6. 6

   Support engine and remove transmission crossmember
   Position a jack with a block of wood under the engine oil pan to support the engine weight. Remove the transmission crossmember mounting bolts (typically 4 bolts connecting crossmember to frame). Remove any bolts securing the transmission mount to the crossmember. Lower and remove the crossmember from the vehicle.
7. 7

   Remove transmission bellhousing bolts
   Position the transmission jack under the transmission and secure it with a strap or chain. Remove all bellhousing-to-engine block bolts around the perimeter of the bellhousing. Note the number and locations of bellhousing-to-block bolts (verify exact count and lengths against OEM specification). Note the location of any different length bolts or bolts with ground straps attached.
8. 8

   Remove transmission
   With the transmission securely supported on the jack, carefully slide the transmission rearward, ensuring the input shaft clears the clutch disc and pilot bearing. The transmission must move straight back to avoid binding. Once the input shaft is clear of the bellhousing, carefully lower the transmission and roll it out from under the vehicle. Have an assistant help guide and stabilize the transmission during removal.
9. 9

   Remove clutch assembly
   Inspect the clutch disc, pressure plate, and flywheel for wear and damage while accessible. Mark the position of the pressure plate to the flywheel for balanced reinstallation. Gradually loosen the pressure plate bolts in a star pattern to prevent warping, removing small increments (1-2 turns) from each bolt in sequence until spring pressure is released. Remove all pressure plate bolts, then remove the pressure plate and clutch disc. Keep the clutch disc clean and avoid touching the friction surfaces.
10. 10

    Extract pilot bearing
    Inspect the pilot bearing in the center of the crankshaft. The bearing is pressed into the crankshaft bore. Use a pilot bearing puller or slide hammer with internal puller jaws designed for pilot bearing removal. Thread or expand the puller inside the bearing, then extract the bearing using steady, controlled force. Alternative method: pack the cavity behind the bearing with heavy grease and use a close-fitting shaft to hydraulically force the bearing out. Ensure the crankshaft bore is not damaged during extraction.
11. 11

    Prepare crankshaft bore and install new pilot bearing
    Clean the pilot bearing bore in the crankshaft thoroughly, removing all old grease, debris, and residue. Inspect the bore for damage or scoring. The new pilot bearing must be installed with the correct orientation (sealed side facing outward/toward transmission). Lightly coat the outer diameter of the new bearing with clean engine oil. Use a pilot bearing installation tool or appropriately sized deep socket that contacts only the outer race of the bearing. Drive the bearing straight into the bore until it is seated at the correct depth, typically flush with or slightly recessed from the crankshaft face. Do not strike the inner race or bearing seal during installation.
12. 12

    Install clutch assembly
    Clean the flywheel surface with brake cleaner and inspect for heat damage, cracks, or excessive wear. If reusing the clutch disc and pressure plate, install them in their original orientation. Position the clutch disc against the flywheel with the raised hub side facing the transmission (away from flywheel). Insert a clutch alignment tool through the clutch disc hub and into the new pilot bearing to center the disc. Position the pressure plate over the disc, aligning marks made during removal if reusing. Install all pressure plate bolts hand-tight. Tighten the pressure plate bolts gradually in a star pattern to prevent disc distortion, bringing all bolts to the OEM-specified torque incrementally (verify torque specification). Ensure the alignment tool remains centered and moves freely during tightening. Remove the alignment tool only after all bolts are torqued.
13. 13

    Install transmission
    Lightly lubricate the transmission input shaft splines with a small amount of high-temperature grease (do not over-lubricate as excess can contaminate the clutch). Position the transmission on the transmission jack and raise it into position. Ensure the input shaft aligns with the clutch disc hub and pilot bearing. Carefully slide the transmission forward, rotating the output shaft slightly if needed to engage the splines. The transmission should slide forward with moderate effort until the bellhousing contacts the engine block. If excessive force is required, remove the transmission and check alignment. Do not use bellhousing bolts to draw the transmission into place.
14. 14

    Install bellhousing bolts and crossmember
    Install all bellhousing-to-engine block bolts in their correct locations, ensuring any ground straps are reinstalled. Tighten the bellhousing bolts in a star pattern to the OEM-specified torque (verify torque specification). Install the transmission crossmember and loosely install all mounting bolts. Align the transmission mount to the crossmember and install those bolts. Tighten all crossmember and mount bolts. Remove the engine support jack.
15. 15

    Reconnect all components
    Reconnect the clutch hydraulic line to the slave cylinder and secure properly. Reconnect all electrical connectors to the transmission. Install the shifter assembly and linkage to the transmission. Reattach the driveshaft to the differential flange, aligning the marks made during removal, and install all 4 bolts. Reconnect the exhaust system and install all hangers. Install the transmission drain plug with a new gasket.
16. 16

    Refill transmission and bleed clutch system
    Using a fluid pump or funnel with extension hose, refill the transmission through the fill hole with the OEM-specified manual transmission fluid until fluid begins to drip from the fill hole (verify exact capacity and fluid type against OEM specification). Install the fill plug. Bleed the clutch hydraulic system according to manufacturer procedure to remove any air introduced when the hydraulic line was disconnected. Check clutch pedal operation for proper engagement and disengagement.
17. 17

    Final inspection and test
    Reinstall rear wheels and lower the vehicle. Reconnect the negative battery cable. Check all fluid levels. Start the engine and verify no leaks from the transmission, clutch hydraulic system, or driveshaft connections. With the engine running and clutch pedal depressed, verify smooth shifting through all gears. Test drive the vehicle to confirm proper clutch engagement, smooth shifting, and no unusual noises or vibrations.

Reassembly

1. Bellhousing bolts must be tightened in a star pattern to ensure even mating of transmission to engine block
2. Clutch pressure plate bolts must be tightened gradually in increments using a star pattern to prevent disc warpage
3. Driveshaft must be installed with alignment marks matched to maintain driveline balance
4. Ensure clutch hydraulic system is fully bled before driving to prevent clutch damage
5. Verify transmission is completely filled to the proper level before operation

Verification

• Clutch pedal should have normal resistance and release smoothly with no sponginess (indicating proper hydraulic system bleed)
• All gears should engage smoothly without grinding when clutch is fully depressed
• No fluid leaks from transmission, driveshaft, or hydraulic connections after test drive
• No unusual vibrations or noises during acceleration or deceleration
• Clutch should engage and disengage at normal pedal position without slipping under load

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