Probe V6-153 2.5L DOHC (1994)
Technical Service Bulletin # 9774
A/T - 4EAT Harsh 1-2 Upshift
TRANSAXLE - 4EAT - HARSH SHIFT FROM 1ST TO 2ND GEAR - 2.0L (1993 ONLY) AND 2.5L (1993-95) ENGINES
This TSB article is being republished in its entirety to revise the service procedure and part number application.
A harsh shift when shifting from 1st to 2nd gear, at normal operating temperatures, may be felt on some vehicles. This may be caused by a higher than
normal control pressure passing through the main control separator plate.
Replace the main control separator plate, Torque Converter Clutch (TCC) solenoid and the line pressure solenoid with a revised plate and solenoids.
Refer to the following Diagnostic and Repair Procedures for details.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage
Remove And Install Main
Control, Replace Separator
Plate, Torque Converter
Clutch (TCC) Solenoid And
Line Pressure Solenoid
BASIC PART NO.
OASIS CODES: 501000, 504000
BEFORE PERFORMING THE DIAGNOSTIC PROCEDURE, CHECK TO MAKE SURE THE ENGINE IS OPERATING PROPERLY.
DRIVEABILITY CONCERNS CAN CAUSE THE TRANSAXLE TO SHIFT ERRATICALLY.
Check Throttle Position (TP) sensor by moving throttle from closed to wide open and monitoring voltage (normal is 0.5 volts at closed throttle).
Test drive vehicle after TP sensor adjustment, if needed. If concern is resolved, return vehicle to owner. If concern is still present, proceed to the
following Step 2.