Diagnostic Information - Based On Condition
Vacuum related shift conditions include the following:^ Harsh neutral to reverse
^ Harsh or firm upshifts
^ 2nd gear starts
^ Harsh 3-2 coastdown shifts
^ Rough 4-3 and 3-2 manual downshifts
^ Slipping in drive or reverse
^ Rough 1-2 shifts
^ Erratic shifts
^ Harsh park to reverse
Refer to the following Diagram Chart.
CONDITION INSPECTION PROCEDURES
Transaxle Converter Inspect valve body for foreign material in converter clutch apply valve.
Clutch Will Not Release, Causing Engine to Stop Running
Stuck in First; No Upshift; No 2nd Gear; Late Upshift
Leaks A. Inspect oil pan and gaskets to make certain screws are properly tightened.
B. Inspect side cover for cracks, leaking gaskets and proper screw torque.
C. Check bolt torque on the governor cover. O-ring groove for porosity.
D. Inspect speedometer O-ring.
CONDITIONS INSPECTION PROCEDURES
Leaks (Con.)
E. Check right and left axle seals for cuts, cracks or missing garter spring.
F. Inspect servo cover for damage and porosity.
G. Inspect electrical connector and electrical connector O-ring seal for damage.
H. Inspect modulator O-ring for nicks or cuts.
I Inspect the fill tube for cracks.
J. Inspect throttle valve (T.V.) cable, O-rings and case bore for scoring or porosity.
K. Inspect line and governor oil pressure plugs to make certain they are properly tightened and that they are not cross threaded.
L. Inspect the cooler line fittings or cooler and make certain they are not blocked or restricted. Check the cooler lines for corrosion. Make certain the lines are installed properly and not damaged.
Transaxle Converter An engine miss condition resulting from a cause such as a cracked
Clutch (TCC) spark plug or faulty injector may be misdiagnosed as a TCC
Shudder shudder condition. Verify that the engine is operating properly.
If the shudder condition still exists, contact the Technical Assistance Communication System for an exchange unit.
Harsh 3-2 Downshift A revised calibration 3-2 downshift spring for the valve body
at 25-35 MPH may be obtained from the Technical Assistance Communication
System to correct this condition. Provide model number and Julian date of transaxle. Dealer Technical Bulletin 85-T-06 explains transaxle identification of this information.
The following is a list of the parts that can be serviced on-car. Attaching screws, bolts and conical washers are not included. The part reference number, following the part name, is the same number found in the service manual 440-T4 section and the parts illustration.
MODULATOR ........................ #19
MODULATOR O-RING ................. #18
MODULATOR RETAINER.................#20
MODULATOR BOLT ....................#21
MODULATOR VALVE ...................#17
GOVERNOR COVER......................#9
GOVERNOR COVER O-RING...............#8
GOVERNOR THRUST BEARING.............#7
SPEEDO DRIVE GEAR...................#6
GOVERNOR ASSEMBLY ..................#5
SIDE COVER ....,....................#51
SIDE COVER GASKET ..................#64
SIDE COVER/CHANNEL PLATE ...........#65
MAGNET ....................................#66
TRANS. OIL PAN.............................#59
TRANS. OIL PAN GASKET .....................#63
FILTER ASSEMBLY ...........................#58
GOVERNOR OIL PIPE RETAINER ...............#129
GOVERNOR RETAINER GASKET .................#128
GOVERNOR FEED SCREEN .....................#126
GOVERNOR FEED PIPE .......................#125
GOVERNOR RETURN PIPE .....................#124
LUBE PIPE - FINAL DRIVE...................#123
ACCUMULATOR COVER ........................#121
F.D. LUBE PIPE BRACKET ...................#143
ACCUMULATOR COVER GASKETS ................#119
OIL PUMP ASSEMBLY ......................#44
(and related sub-assemblies)
T.V. LEVER & BRACKET ASM ...............#50
T.V. LINK ..............................#49
SERVO PIPE RETAINER ...................#133
CONTROL VALVE ASSEMBLY .................#35
ALIGNMENT SLEEVE ......................#406
DETENT SPRING & ROLLER ASM ........... #707
T.C.C. WIRING HARNESS ..................#61
CLIPS (harness) ...................#62 & 67
CASE CONNECTOR .........................#23
CASE CONNECTOR O-RING ..................#18
SOLENOID ASSEMBLY .....................#328
SOLENOID O-RING .......................#329
SPACER PLATE ...........................#31
SPACER PLATE GASKET C/P ................#30
SPACER PLATE GASKET S.P./V.B ...........#32
OIL PUMP DRIVE SHAFT ...................#29
O.P. DRIVE SHAFT O-RING ................#28
ACCUMULATOR COVER SPACER PLATE ...........#120
ACCUMULATOR PINS ...................#111 & 115
1-2 ACCUMULATOR SPRING ...................#116
ACCUMULATOR PISTON SEALS .................#117
1-2 PISTON ...............................#118
3-4 ACCUMULATOR SPRING ...................#112
3-4 ACCUMULATOR PISTON ...................#114
DRIVE SPROCKET SUPPORT LUBE PIPE .........#110
LUBE PIPE RETAINER .......................#109
LUBE PIPE RETAINER .......................#108
OIL SCOOP ................................#106
1-2 SERVO BRACKET ........................#148
COOLER CONNECTORS ..................#526 & 569
THERMO ELEMENT ..................#102 thru 105
AXLE OIL SEALS .....................#405 & 540
VENT ASSEMBLY ............................#528
PIPE PLUG ................................#529
Refer to Section 7A in the chassis service manual for the appropriate service procedures.
NOTICE: If repairs require removal or disassembly of the channel plate, the transaxle must be removed and replaced with an exchange unit.
Exchange units may be obtained by contacting the Oldsmobile Technical Assistance
Communication System. Provide the following information:
Dealer name, address and dealer code Vehicle identification number and mileage Transaxle model, number and Julian date Transaxle oil pressures, Details of transaxle problem