Underdrive Clutch

U250E AUTOMATIC TRANSAXLE: UNDERDRIVE CLUTCH: INSPECTION

INSPECTION

1. INSPECT UNDERDRIVE PACK CLEARANCE





(a) Install the underdrive clutch to the transaxle case.
NOTICE: 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/cm2, 57 psi).
Pack clearance:
1.51 to 1.71 mm (0.0594 to 0.0673 in.)
If the pack clearance is not within the specified range, inspect the discs, plates, and flange.
2. INSPECT NO. 1 UNDERDRIVE CLUTCH DISC





(a) Check if the sliding surfaces of the discs, plates and flange are worn or burnt. If necessary, replace them.
HINT:
- If the lining of a disc comes off or discolors, or even if a part of the groove is damaged, 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 inside diameter:
32.56 to 32.58 mm (1.2818 to 1.2826 in.)
Maximum inside diameter:
32.63 mm (1.2846 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 vernier calipers, measure the free length of the spring together with the spring seat.
Standard free length:
17.14 mm (0.6748 in.)
If the free length is shorter than the standard free length, replace the underdrive clutch return spring sub-assembly.