Underdrive Clutch

U151E AUTOMATIC TRANSAXLE: UNDERDRIVE CLUTCH:

INSPECTION

1. INSPECT UNDERDRIVE PACK CLEARANCE





(a) Install the underdrive clutch to the transaxle case.

NOTE: Be careful not to damage the oil seal rings.

(b) Install a dial indicator as shown in the illustration.
(c) Measure the underdrive clutch pack clearance while applying and releasing compressed air (392 kPa, 4.0 kgf/cm 2, 57 psi).
Pack clearance:
1.51 - 1.71 mm (0.0594 - 0.0673 in.)
If the pack clearance is not within standard, inspect the discs, plates and flange.
2. INSPECT UNDERDRIVE CLUTCH DISC NO.1





(a) Check to see if the sliding surface of the disc, plate and flange are worn or burnt. If necessary, replace them.

- If the lining of the disc comes off or discolors, or even if a part of the groove is defaced, replace all discs.
- Before assembling new discs, soak them in ATF for at least 15 minutes.

3. INSPECT UNDERDRIVE CLUTCH DRUM SUB-ASSEMBLY





(a) Using a dial indicator, measure the inside diameter of the underdrive clutch drum bushing.
Standard drum bushing:
37.06 - 37.08 mm (1.4591 - 1.4598 in.)
Maximum drum bushing:
37.08 mm (1.4598 in.)
If the inside diameter is greater than the maximum, replace the underdrive clutch drum.
4. INSPECT UNDERDRIVE CLUTCH RETURN SPRING SUB-ASSEMBLY





(a) Using a vernier calipers, measure the free length of the spring together with the spring seat.
Standard free length:
17.14 mm (0.6752 in.)