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All Technical Service Bulletins for Band Apply Servo:|83T42 > < A/T - Low and Reverse Piston Installation/Removal
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Band Apply Servo: All Technical Service Bulletins
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

All Technical Service Bulletins for Band Apply Servo:|83T42 > < A/T - Low and Reverse Piston Installation/Removal