Ninety-Eight FWD V6-181 3.0L (1985)
B.
Leak at 1-2 servo apply or release pipe to valve body or case seal.
No Forward Gear
A.
No forward gear - Slips all ranges. Input clutch may be burnt.
B.
Input accumulator piston cocking in bore. The input accumulator piston is located on the case side of the channel plate.
Shudder on 3-4 Shift
Turbine shaft O-ring cut or missing.
TCC on at Stops
Engine Stalls - may have a valve body knockout slug lodged in TCC apply valve; TCC apply valve locked in apply position.
Fluid Burned, Slips in Second
Pinched vacuum line holding vacuum in modulator causing low pressure and a burned second clutch. A SRTA unit should be considered. Replace
vacuum line.
Harsh 4-3 Downshift
1.
Check TCC circuit with a test light to check TCC release before downshift.
NOTICE:
Test light bulb must have enough resistance so that it will not ground out terminal
F.
Bulb no. 73, WDDGM part number 9436790 or bulb no. 756, WDDGM part number 9428049 has adequate resistance.
PROM, part number 16047215 described in Dealer Technical Bulletin 85-T-13 assures TCC release before downshift. This PROM applies ONLY to
1985 Ninety-Eight models with 3.8L engines built PRIOR to the following VINs:
F4328962 F1326511
Later production cars have "WF4" on the Service Part Identification Label which identifies a later ECM circuit which assures TCC release.
2.
Incorrect TV cable adjustment - The TV cable controls shift timing only. If misadjusted, upshifts will be incorrectly timed.
3.
Incorrect throttle position sensor operation or adjustment.
Refer to pages 6E3-177 and 6E3-178 of the 1985 chassis service manual for adjustment procedure.
4.
Number 1 check ball missing.
5.
Number 10 check ball sticking or peened into spacer plate.
Harsh 3-2 Downshift
1.
3.8L 1985 model only - Replace 3-2 downshift spring in valve body with new spring available by contacting the Oldsmobile Technical Service
Communication System. This correction does NOT apply to models equipped with 3.0L engines or 1985-1/2 models.
2.
Missing check ball number 2, 4 or 12.
3.
Valve body - Sticking 3-2 control valve, 3-2 coast valve or 1-2 servo control valve.
4.
Vacuum loss - To diagnose, connect direct manifold vacuum of at least 13 inches to the modulator on 1985 models equipped with an aspirator
solenoid.
Whine Noise
A whine or whistle noise under acceleration may be due to:
-
Low fluid level
-
Filter-to-case seal leak
-
Leak at filter crimp
