31TH AUTOMATIC TRANSAXLE
TABLE OF CONTENTS
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31TH AUTOMATIC TRANSAXLE
DIAGNOSIS AND TESTING .................22
ROAD TEST ...........................22
DISASSEMBLY...........................23
ASSEMBLY .............................35
SCHEMATICS AND DIAGRAMS ..............45
SPECIFICATIONS ........................53
SPECIAL TOOLS .........................56
BANDS
DESCRIPTION ...........................60
OPERATION.............................60
ACCUMULATOR
DESCRIPTION ...........................60
OPERATION.............................60
FINAL DRIVE
ADJUSTMENTS ..........................61
GOVERNOR
DESCRIPTION ...........................62
OPERATION.............................62
CLEANING..............................63
INSPECTION ............................63
TORQUE CONVERTER
DESCRIPTION ...........................63
OPERATION.............................66
REMOVAL ..............................68
INSTALLATION...........................68
31TH AUTOMATIC
TRANSAXLE
DIAGNOSIS AND TESTING - ROAD TEST
Prior to performing a road test, check the fluid
level and throttle valve cable adjustments.
During the road test, the transaxle should be oper-
ated in each position to check for slipping and any
variation in shifting.
If vehicle operates at high speeds, but has poor
acceleration, the converter’s overrunning clutch may
be slipping. If acceleration is normal, but high throt-
tle opening is needed for high speeds, the stator
clutch may have seized.
Observe closely for slipping or engine speed flare-
up. Slipping or flare-up in any gear usually indicates
clutch, band, or overrunning clutch problems. If the
condition is far advanced, an overhaul will probably
be necessary to restore normal operation.
In most cases, the clutch or band that is slipping
can be determined by noting the transaxle operation
in all selector positions and then comparing which
internal units are applied in those positions. The Ele-
ments–in–Use Chart provides a basis for road test
analysis.
21s - 22 31TH AUTOMATIC TRANSAXLE PL
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