Section B THM 440-T4 Service Information and Repair Procedures
NOTE: General groups are listed in alphabetical order Bulletins are listed in previous to most current orderGENERAL
MODEL/YEAR BULLETIN NUMBERS SUBJECT SUMMARY
GROUPS
CASE All models BUICK 85-7-1 Explanation of all key transmission identifications.
CAN 5-7103
CHEV 84-191
CORP 857989
GMTC 85-B2
HM 84-25
OLDS 85-T6
PONT * 85-7-2
CLUTCHES 1985 BUICK 5-74402 This new servo seal spring retainer has
and CAD T4-89 been added to reduce damage to the
BANDS CAN 7-136 reverse servo seal during assembly.
CHEV 84-146
CORP 857901
HM 84-17
OLDS 34-11
PONT * 4-7-25
All models CAN 7-142 Provides instructions for assembly and disassembly
CORP 857602 of 4th clutch apply plate.
HM 84-21
OLDS 35-2
All models BUICK 5-440-7 Part chart listed and description of
CAN 5-7107 this new torque convener clutch
CHEV 85-6 solenoid screen.
CORP 857604
HM 84-31
OLDS 35-4
THM 440-T4 SERVICE INFORMATION and REPAIR PROCEDURES (Cont'd)
NOTE: General groups are listed in alphabetical order Bulletins are listed in previous to most current order
GENERAL
MODEL/YEAR BULLETIN NUMBERS SUBJECT SUMMARY
GROUPS
DRIVE All models BUICK 5-74402 New service procedure for checking chain
CHAIN CAD T4-89 wear using scribe marks on case.
CAN 7-136
CHEV 84-146
CORP 857901
HM 84-14
OLDS 34-11
PONT* 4-7-25
OIL PUMP All models BUICK 2-I-226 Rear oil seal illustration emphasizing cleaning.
CAN 7-114
CHEV 54-3
CORP 827901
HM 81-59
All models CAN 5-7110 Service parts and procedure are now available
CORP 857605 to service the oil pump rotor, slide, and vanes
HM 85-05 in the pump body assembly. Part numbers given.
THM 440-T4 SERVICE INFORMATION and REPAIR PROCEDURES (Cont'd)
NOTE: General groups are listed in alphabetical order Bulletins are listed in previous to most current order
GENERAL
MODEL/YEAR BULLETIN NUMBERS SUBJECT SUMMARY
GROUPS
SERVICE 1985-1985 1/2 HM 85-49 Service parts information and information on
PARTS release of 8 new model 440T4 transmissions
UNIT is given.
REPAIR
All models BUICK 6-440-1 SRTA program is explained and contrasted to
All years CHEV SER-126 the present repair procedures.
CORP 867600
HM 85-56
OLDS 6-I-10
PONT * 5-7-33
TORQUE All models BUICK 82-I-12A Addition of converter clutch requires this
CONVERTER CAN 07102 new flushing procedure.
COMPONENTS CORP 817912
GMTC 82-B-8