A/T - RWD 4 Speed Rough 1-2 Upshift
TECHNICAL BULLETIN # 162TRANSMISSION: TOYOTA RWD 4 SPEEDS
SUBJECT: ROUGH 1-2 UPSHIFT
APPLICATION: TOYOTA
DATE: April 93
TOYOTA RWD 4 SPEED ROUGH 1-2 UPSHIFT
A complaint of a rough 1-2 shift, with all other shifts normal may be caused by a missing or worn checkball. It is common for the ball to wear small, blow through the plate and lodge the upper rear valve body.
This applies to all A-40 series units EXCEPT the A43DE & A4OD.