Valve Body

Remove and replace the automatic transmission valve body on a 2008 Dodge Viper with 8.4L V10, requiring transmission pan removal and internal component access.

Warnings

Tools required

Parts

• Transmission valve body × 1 — Use OEM specification
• Transmission oil pan gasket × 1 — Use OEM specification
• Transmission filter (if replacing) × 1 — Use OEM specification
• Valve body gasket set × 1 — Included with valve body or separate

Fluids

• Mopar ATF+4 — 6 qt

Preparation

1. Park vehicle on level ground and apply parking brake firmly.
2. Place wheel chocks behind rear wheels.
3. Allow transmission to cool completely if vehicle has been recently operated.
4. Raise vehicle using floor jack and support securely on jack stands under manufacturer-recommended lift points.
5. Verify vehicle is stable before working underneath.
6. Position drain pan beneath transmission oil pan.

Procedure

1. 1

   Remove transmission oil pan
   Locate the transmission oil pan bolts around the perimeter of the pan. Loosen all pan bolts in a cross pattern, leaving two bolts at opposite corners partially threaded. Carefully break the pan seal by gently prying at one corner with a plastic trim tool, allowing fluid to drain into the catch pan. Once fluid flow slows, remove the remaining bolts and lower the pan. Expect approximately 4-5 quarts of ATF to drain.
2. 2

   Remove transmission filter
   Locate the transmission filter secured to the valve body. Remove the filter mounting bolts (typically 3 bolts securing the filter). Pull the filter straight down to disengage it from the valve body pickup tube. Inspect the filter seal and discard the old filter if replacing.
3. 3

   Disconnect valve body electrical connectors
   Locate the solenoid pack electrical connectors on the valve body. Press the connector locking tabs and carefully disconnect each electrical connector from the solenoid pack. Note the orientation and routing of each connector for reinstallation. There are typically 2-3 connectors depending on transmission configuration.
4. 4

   Remove valve body mounting bolts
   Locate all valve body mounting bolts securing the valve body to the transmission case. Remove the 14-16 valve body mounting bolts in a systematic pattern, working from outside edges toward the center. Keep bolts organized as they may be different lengths in different positions. Use a magnetic parts tray to prevent loss of bolts.
5. 5

   Remove manual valve linkage
   Locate the manual valve lever attached to the valve body. Note the position and orientation of the manual valve where it engages with the transmission manual shaft. Carefully disengage the manual valve from the manual shaft by gently pulling the valve body away while guiding the manual valve free. Do not lose the manual valve detent spring or roller if present.
6. 6

   Lower and remove valve body
   Carefully lower the valve body assembly while keeping it level to prevent internal components from falling out. Watch for any check balls, springs, or separator plates that may be positioned between the valve body and transmission case. Note their exact positions before removal. Place the valve body on a clean work surface with the mating surface facing up.
7. 7

   Inspect and document separator plate and check balls
   Examine the separator plate (steel plate between valve body and case) and note the location of all check balls in the transmission case and separator plate passages. Typical configurations have 3-5 check balls in specific passages. Take a photograph or make a detailed diagram of check ball positions before removal, as incorrect placement will cause transmission malfunction. Remove check balls and separator plate carefully.
8. 8

   Clean transmission case surface
   Use a razor blade scraper to carefully remove all old gasket material from the transmission case mating surface where the valve body mounts. Do not gouge or scratch the aluminum case surface. Clean the surface thoroughly with degreaser and shop rags. Inspect the case for cracks or damage. Ensure all fluid passages are clear of debris.
9. 9

   Install new valve body with check balls and separator plate
   Position the new or rebuilt valve body nearby. Install check balls in the transmission case passages according to your documentation from step 7. Apply a thin film of ATF+4 to the check balls to hold them in position. Install the separator plate with new gasket, ensuring proper alignment with all dowel pins and passages. Position the new valve body assembly carefully, aligning it with the manual shaft and ensuring the manual valve engages properly.
10. 10

    Install valve body mounting bolts
    Thread all valve body mounting bolts by hand, ensuring each bolt is started in its correct position. Once all bolts are finger-tight, torque the valve body bolts in a cross pattern from center outward to 105 in-lb. Verify all bolts are properly seated and torqued.
11. 11

    Reconnect electrical connectors
    Reconnect all solenoid pack electrical connectors to the valve body, ensuring each connector locks securely with an audible click. Verify connector routing matches original configuration and that no wires are pinched or stretched.
12. 12

    Install transmission filter
    Install a new transmission filter if replacing. Position the filter seal onto the valve body pickup tube and push the filter into place. Install the filter mounting bolts and torque to 40 in-lb.
13. 13

    Clean and install transmission oil pan
    Clean the transmission oil pan thoroughly, removing all old gasket material and debris. Inspect the pan for damage or cracks. Install a new transmission pan gasket according to gasket manufacturer instructions (some gaskets require RTV sealant, others are dry install). Position the pan onto the transmission case and thread all pan bolts by hand. Torque pan bolts in a cross pattern to 165 in-lb. Do not overtighten as this can warp the pan and cause leaks.
14. 14

    Refill transmission fluid
    Lower vehicle from jack stands. Locate the transmission dipstick tube. Add approximately 5 quarts of Mopar ATF+4 through the dipstick tube using a funnel. Start the engine and allow it to idle. With the engine running and parking brake applied, move the shift lever through all gear positions, pausing 2-3 seconds in each position. Return to Park. Check fluid level with engine running and transmission at operating temperature. Add fluid as necessary to bring level to the correct mark on dipstick. Total capacity is approximately 6 quarts for this service.

Reassembly

1. Reassembly is integrated into the installation steps above.
2. Verify all electrical connectors are fully seated and locked.
3. Double-check that all valve body bolts are torqued to specification in proper sequence.
4. Ensure transmission pan bolts are torqued evenly to prevent leaks.

Verification

• Start engine and verify no fluid leaks from transmission pan or valve body area while engine is idling.
• With engine at idle and parking brake applied, shift through all gear ranges and verify smooth engagement.
• Test drive vehicle and verify proper shift quality, timing, and feel in all gears.
• Check for diagnostic trouble codes (DTCs) related to transmission solenoids or pressure control.
• Recheck transmission fluid level after test drive with transmission at operating temperature.
• Inspect underneath vehicle for any signs of fluid leakage after test drive.

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