Inspection Of Underdrive Unit; Inspect Underdrive Clutch Piston - Toyota MR2 1988 Repair Manual

AUTOMATIC TRANSAXLE - Component Groups (Counter Shaft) AT-91
SST
AT0576AT0577
AT2520
15. REMOVE FLANGE, DISCS AND PLATES
16. COMPRESS PISTON RETURN SPRING AND REMOVE
SNAP RING
(a) Place SST on the spring retainer and compress the
springs with a press.
SST 09350-32013 (09351-32070)
(b) Remove the snap ring.
17. REMOVE RETURN SPRING
18. BLOW OUT PISTON
Apply compressed air into the oil passage to remove the
piston.
If the piston does not come out, use needle-nose pliers to
remove it.
INSPECTION OF UNDERDRIVE UNIT
1. INSPECT UNDERDRIVE CLUTCH PISTON
(a) Check that the check ball is free by shaking the
piston.
(b) Check that valve does not leak by applying low-
pressure compressed air.
2. INSPECT DISC, PLATE AND FLANGE
Check that the sliding surface of disc is not worn or burnt.
If the disc is worn or burnt, replace all discs.
Then check that the sliding surfaces of plate and flange
are not worn or burnt.
If necessary, replace them.