Workshop

General Motors THM 4T80-E

INDEX
Copyright © ATSG 1999
G.M. 4T80-E
2
POWERFLOW AND SOLENOID CHARTS............................. ............................................................................... 4
SOLENOID LOCATIONS.................................................................. ........................................................................ 5
ELECTRONIC CONTROLS DESCRIPTION......................................................................................................... 6
TROUBLE CODE CHART ......................................................................................................................................... 11
ONBOARD DIAGNOSTIC............................................................. ........................................................................... 12
WIRE SCHEMATIC.................................................................... .............................................................................. 14
CASE CONNECTOR PIN I.D............................................................. ....................................................................... 16
LINE PRESSURE TEST....................................................................... ...................................................................... 18
OIL PASSAGE I.D............................................................. .......................................................................................... 29
CASE COVER CHECKBALL LOCATIONS............................................................................................................ 33
LOWER VALVE BODY CHECKBALL LOCATIONS............................................................................................. 35
ACCUMULATOR HOUSING CHECKBALL LOCATIONS.................................................................................. 36
TRANSAXLE DISASSEMBLY................................................................................................................................... 38
COMPONENT SUB-ASSEMBLY............................................................................................................................... 53
TRANSAXLE RE-ASSEMBLY................................................................................................................................... 77
INPUT SHAFT END-PLAY MEASUREMENT......................................................................................................... 85
FINAL DRIVE END-PLAY MEASUREMENT.......................................................................................................... 92
TORQUE SPECIFICATIONS................................................................................................................................... 102
BOLT LOCATIONS AND IDENTIFICATION........................................................................................................ 104
AIR CHECKING PROCEDURES............................................................................................................................ 108
SPECIAL TOOL REQUIREMENTS........................................................................................................................ 112
AUTOMATIC TRANSMISSION SERVICE GROUP
18639 S.W. 107TH AVENUE
MIAMI, FLORIDA 33157
(305) 670-4161

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