S10/T10 P/U 2WD L4-121 2.0L VIN Y 2-bbl (1983)
Band Apply Servo: Customer Interest
A/T - Erratic Shifts
Number:
83-T-72
Section:
VIIC
Date:
August, 1983
Subject:
ERRATIC SHIFTS ON THM 200-4R, 1983 THM 200-4R (BR MODEL)
TO:
ALL CHEVROLET DEALERS
1983 THM 200-4R Model "BR" transmissions may experience erratic shifts, or some felt as a soft 1-2 and 2-3 shifts.
To reduce these erratic shifts, a new Intermediate Servo Assembly went into production in late October, 1982.
When servicing any 1983 THM 200-4R model "BR" transmission with any erratic shift condition, that has a "3-BR-1" or a "3-BR-2" ink
stamp on the top, front bell housing of the transmission, replace the Intermediate Servo Assembly with service part numbers:
1
-
Intermediate Servo Piston/
Oil Seal Ring Package ...........
8632980
1
-
Intermediate Servo Cushion Spring .
8639264
1
-
Intermediate Servo Piston/
Oil Seal Oil Ring Package .......
8632928
1
-
Intermediate Servo Cover/
"O" Ring Seal ...................
8628136