Low/Reverse Servo Assembly

Removal

NOTE: Some vehicles may require removal of interfering exhaust system components.

1. Raise the vehicle on a hoist so the transmission oil pan is accessible. Refer to Section 00-02.

2. Starting at the rear and working toward the front, loosen the oil pan retaining bolts and drain the fluid from the transmission. It may be necessary to use a 3/8-inch or 1/4-inch drive ratchet with a 10mm universal socket to remove the oil pan bolts.

3. Remove the transmission oil pan retaining bolts, pan and gasket. Discard gasket.

4. Remove three filter-to-valve body retaining bolts and remove the filter, grommet and gasket. Discard gasket. If the fluid is contaminated, refer to Transmission Fluid Condition Check procedure under Diagnosis and Testing.

5. Remove the detent spring and retaining bolt.

6. Remove the valve body-to-case retaining bolts. Remove the valve body. Discard valve body-to-case gasket.

   NOTE: Care must be taken to prevent reverse servo piston from springing free from case when cover is removed.

7. Depress the reverse servo piston cover with a hammer handle as shown. Remove the retaining snap ring and piston cover.

Installation

1. Clean and inspect the servo pocket in the case.

2. Clean the reverse servo piston, cover and return spring. Inspect the piston and cover sealing edges for cuts, burrs or irregular wear pattern. Replace if necessary.

3. Assemble the return spring to the servo piston.

   NOTE: Make sure that the servo piston is reinstalled with the same rod length as the one which was removed.

4. Install the reverse servo piston and spring, and the servo cover into the case reverse servo pocket.

5. Using the handle of a hammer, depress the reverse servo piston and cover sufficiently to gain clear access to the retaining snap ring groove in the case. Install the snap ring.

6. Inspect the outer edge of reverse servo pocket for nicks or burrs which might have been raised during the removal or installation of the retaining snap ring.

    CAUTION: Failure to remove nicks and burrs may cause improper seating of the valve body separator plate to the hydraulic passages in the case and subsequent cross-leakage.

7. Remove nicks or burrs with a fine honing stone and clean the affected surfaces thoroughly.

8. Clean and inspect the valve body as outlined in this Section.

9. Position a new valve body gasket to the separator plate.

10. Position a new separator plate gasket to the valve body and case, making sure that the inner manual lever and inner TV lever are engaged.

11. Install two shoulder bolts.

12. Install valve body-to-case retaining bolts. Tighten to 9-11 Nm (80-97 lb-in).

13. Install the detent spring and retaining bolt. Tighten to 9-14 Nm (80-123 lb-in).

14. Position the TV lever torsion spring against the separator plate.

15. Tighten the two shoulder bolts 9-11 Nm (80-97 lb-in).

16. Using three filter retaining bolts, install the filter and gasket to the valve body. Tighten retaining bolts to 9-14 Nm (80-123 lb-in).

17. Clean the transmission oil pan and gasket surfaces thoroughly.

18. Using a new oil pan gasket, secure the pan to the transmission case. Tighten the retaining bolts to 8-13.5 Nm (71-119 lb-in). It may be necessary to use a 3/8-inch or 1/4-inch drive ratchet with a 10mm universal socket to install the oil pan bolts.

19. Install any exhaust system components that were removed.

20. Lower the vehicle and fill the transmission to the correct level with Synthetic MERCON® Multi-Purpose Automatic Transmission Fluid E6AZ-19582-B (ESR-M2C163-A2) or equivalent. Start the engine and shift the transmission to all ranges. Refer to Transmission Fluid Level Check procedure.

21. Adjust the TV linkage cable system as outlined under Cable Adjustment.