A/T Pump Body Assembly - Revised

Number: 83-I-59

Section: VIIc

Date: April, 1983
Subject: THM 200C NEW DESIGN PUMP BODY ASSEMBLY - 1982-83 CAMAROS AND "S" TRUCK

TO: ALL CHEVROLET DEALERS

PUMP BODY ASSEMBLY:

Beginning in early March, 1983, a new design pump body assembly went into production for all 1982 and 1983 THM 200C transmissions used in Camaros and "S" truck applications. The new design pump body assembly has the pressure relief port removed from the body casting (Figures 1 and 2).
When servicing any 1982 or 1983 THM 200C transmission used in Camaro or "S" truck, that necessitates that the pump body assembly be replaced, order service parts as listed below:

MODEL PUMP BODY PUMP COVER

C7,CN,CO,CK,
CB,CW,HB,HF, 8638922 8633958
HH,HL,PS,C9, CS,HO AND JJ

The new design pump body casting will have P/N 8648111 cast into it. Verify that you have the correct part before installing it into the vehicle.

The old style pump body assembly should be used on all other applications except Camaro and "S" truck until the service stock is depleted.