Section A THM 700-R4 Diagnosed Conditions or Symptom Descriptions
NOTE: General groups are listed in alphabetical order Bulletins are listed in previous to most current orderGENERAL DIAGNOSIS
MODEL/YEAR BULLETIN NUMBERS SUBJECT SUMMARY
GROUPS or SYMPTOM
COMPONENT No 4th gear All models CAN 7-134 This condition may be caused by a
CONDITIONS and Burned CHEV 83-T-42 blocked 2-4 servo exhaust hole. The
2-4 Band CORP 837806 hole could be blocked with R.T.V.
Assembly GMTC 83-B-77 silicone sealant and/or some after
HM 83-03 market gaskets.
PONT * 83-T-26
TCC Inoperative 1983 CAN 7-140 Pinched TCC wires causing this
All models CHEV 83-I-78 condition. Special washers have been
GMTC 83-B-86 designed to hold them in place.
HM 83-37
PONT* 83-I-82
Transmission All models CAN 7-204 Possible causes are listed for these
Overheating CHEV 84-10 overheating conditions usually when the
CORP 837834 cooler cannot cool adequately and the
GMTC 84-B-13 TCC is inoperative.
HM 83-55
PONT* 83-I-153
Burned 3-4 1982 CAN 7-112 Illustration and part number given for
Clutch 9Y6 model CHEV 83-124 new spacer plate to correct this
1983 HM 83-65 condition.
3YH, 3Y9 PONT * 83-T-73
Burned 3-4 1982-1985 CAN 7-126 Additional information on burned 3-4
Clutch and/or All models CHEV 84-107 clutch and/or high 2-3 shifts.
high 2-3 GMTC 84-7-18 Illustration provided.
PONT * 84-7-18
THM 700-R4 DIAGNOSED CONDITIONS or SYMPTOM DESCRIPTIONS (Cont'd)
NOTE: General groups are listed in alphabetical order Bulletins are listed in previous to most current order
GENERAL DIAGNOSIS
MODEL/YEAR BULLETIN NUMBERS SUBJECT SUMMARY
GROUPS or SYMPTOM
LEAKS Oil Pump Seal All models CAN 7-163 Illustration of past design and new
Assembly CHEV 83-T-59 revised oil pump which will allow for
Leaking CORP 837817 more effective oil drainback.
GMTC 83-B-98
HM 83-35
PONT* 83-T-38
Diagnosing All models CAN 7-177 Procedure given for diagnosing and
Transmission CHEV 83-I-95 repairing transmission oil leaks.
Oil Leaks CORP 837822
GMTC 83-B-111
HM 83-44B
PONT* 83-I-99
Oil Leak at 1982-1983 CAN 7-197 Cause for leak on 4 wheel drive
Transfer Case All models CHEV 83-I-88 vehicles may be caused by "O-ring"
CORP 836712 seal. Part number included.
GMTC 84-B-96
HM 83-62
Transmission Oil 1983-1984 CAN 7-211 May be caused by gasket. Service
Exhausting Out All models CHEV 84-61 package numbers given to
Breather CORP 847802 correct.
GMTC 84-B-44
HM 83-84A
PONT * 84-7-5A
Transmission Oil All models CAN 7-110 Service package and procedure given
Pan Leaks CHEV 84-69 for new design oil pan.
CORP 837840
GMTC 84-B-46
HM 83-86
PONT* 83-T-72
THM 700-R4 DIAGNOSED CONDITIONS or SYMPTOM DESCRIPTIONS (Cont'd)
NOTE: General groups are listed in alphabetical order Bulletins are listed in previous to most current order
GENERAL DIAGNOSIS
MODEL/YEAR BULLETIN NUMBERS SUBJECT SUMMARY
GROUPS or SYMPTOM
NOISE Buzzing noise 1982 HM 83-48A May be caused by gasket. Service
and possible All models package numbers given to correct
delayed upshifts problem.
Grinding noise 1982-1984 CAN 7-115 Changes in new reaction Internal Gear
in all ranges All models CHEV 84-86 are listed. Part numbers and illustration
CORP 847804 given.
GMTC 84-13-56
HM 84-08
PONT * 84-7-7
PERFORMANCE No Drive and 1982-1983 CAN 7-174 Cracked oil pump rotor may be possible
Reverse All models CHEV 83-T-51 cause for this condition. Service
CORP 837812 procedure to verity broken oil pump
GMTC 83-B-84 rotor.
HM 83-21
PONT* 83-T-33
Slipping in All models CAN 7-149 Diagnosis procedure provided for this
Reverse or CHEV 83-T-55 condition. Includes illustrations of
no Reverse CORP 837815 reverse input piston.
GMTC 83-B-120
HM 83-38
PONT * 83-T-37
Harsh Manual 1982-1983 HM 83-46A Service information given to correct
downshift feel All models problem. Also new control valve
and/or delayed assemblies and spacer plates went into
downshift production on March 25, 1983.
THM 700-R4 DIAGNOSED CONDITIONS or SYMPTOM DESCRIPTIONS (Cont'd)
NOTE: General groups are listed in alphabetical order Bulletins are listed in previous to most current order
GENERAL DIAGNOSIS
MODEL/YEAR BULLETIN NUMBERS SUBJECT SUMMARY
GROUPS or SYMPTOM
PERFORMANCE No 2nd, 4th All models CAN 7-192 Inspection of the reaction Sun Gear
or Reverse Gear CHEV 83-I-125 Shell is necessary to find broken hub
Operation CORP 837828 or stripped spline causing symptom.
GMTC 83-B-116 Illustration provided.
HM 83-57
PONT* 83-I-122
Loss of power 1982-1984 BUICK 84-7-2 New brazing process for converter
in Drive CAN 7120 blades prevents movement of blades and
& Reverse CHEV 84-I-93 reduction of torque multiplication. Part
CORP 847901 chart and models listed.
HM 83-80
OLDS 34-8
PONT * 4-7-23
Elimination of 1984 CAN 7-141 Elimination of 4-3 downshift switch will
4-3 Downshift YA & YW models CHEV 84-144 improve 4-3 downshift. Illustration
CORP 847808 of 4-3 downshift switch wiring diagram.
HM 84-09
No drive after 1982-1985 HM 85-57 Service and repair information given.
extended high All models Overhaul part numbers are also given.
speed operation
THM 700-R4 DIAGNOSED CONDITIONS or SYMPTOM DESCRIPTIONS (Cont'd)
NOTE: General groups are listed in alphabetical order Bulletins are listed in previous to most current order
GENERAL DIAGNOSIS
MODEL/YEAR BULLETIN NUMBERS SUBJECT SUMMARY
GROUPS or SYMPTOM
SHIFTING Burned 2-4 All models CAN 7-136 Service and diagnosis procedure for a
band and/or CHEV 83-T-43 slipping or no 1-2 shift condition.
3-4 clutch CORP 837805
GMTC 83-B-78
HM 83-28
PONT* 83-T-27
Harsh 2-1 feel 1982-1983 CAN 7-212 New control valve assembly and spacer
or Delayed CHEV 83-126 plate went into production to control
Downshifts CORP 837837 this condition. Part number included.
GMTC 84-B-50
HM 83-46A
PONT * 83-T-64A
THM 700-R4 DIAGNOSED CONDITIONS or SYMPTOM DESCRIPTIONS (Cont'd)
NOTE: General groups are listed in alphabetical order Bulletins are listed in previous to most current order
GENERAL DIAGNOSIS
MODEL/YEAR BULLETIN NUMBERS SUBJECT SUMMARY
GROUPS or SYMPTOM
SHIFTING Buzzing noise 1982 CAN 7-114 New service package for spacer plates
(cont'd) and Delayed All models CHEV 82-T-146 and gaskets is given if replacement
Upshifts GMTC 83-B-123 is necessary.
HM 83-48A
Erratic 1982-1983 CAN 7-195 Some 1982 and 1983 may exhibit erratic
Shifting All models CHEV 83-I-126 shift conditions which adjusting the T.V.
CORP 837832 cable won't correct. Repair procedure
GMTC 83-B-127 given to correct this condition.
HM 83-58
PONT * 83-I-146
Erratic or All models CAN 7-203 Worn governor gear may cause these
no upshifts CHEV 84-13 conditions. Diagnosis chart is given for
CORP 837836 servicing governor model year.
GMTC 84-B-5
HM 83-64
PONT* 83-T-59
Firm or Harsh 1982-1984 CAN 5-7125 New service package for control valve
1-2 Shifts early 1985 CHEV 85-53 body has gone into production to
CORP 837832 eliminate this condition. Part number
GMTC 85-B-58 included.
HM 85-24
PONT * 5-7-12
Early and Soft 1985 HM 85-42 Newly calibrated control valve assembly
Upshifts YT model will eliminate this condition. Illustration
of transmission I.D. name plate location.