A/T - Oil Exhausting Out the Breather
Number: 84-61Section: 7A (VIIc)
Date: Mar., 1984
Subject: TRANSMISSION OIL EXHAUSTING OUT THE BREATHER ON VEHICLES WITH 700-R4 TRANSMISSIONS
Model and Year: 1983-84 "S/T" 10 AND "C/K/G"
10-20 SERIES TRUCKS, CAMARO, CORVETTE, CAPRICE AND CAPRICE WAGONS
TO: ALL CHEVROLET DEALERS
This cancels and replaces Chevrolet Dealer Service Bulletin 84-61 dated February, 1984. Previous copies should be destroyed. This new issue corrects model designations printed in error on the previous copy.
FIGURE 1 - NEW OIL PUMP COVER:
FIGURE 2 - NEW PUMP TO CASE GASKET:
Beginning July 15, 1983 (Julian Date 169), all 700-R4 transmissions were produced using a new oil pump cover (Figure 1) and a new pump to case gasket (Figure 2), that prevents transmission oil from exhausting out the breather during harsh deceleration during sharp turns..
When servicing any 1983 or 1984 THM 700-R4 transmissions for transmission oil pump cover and pump to case gasket, use the service packages listed below:
ORDER SERVICE
MODELS PACKAGE NUMBER
3TS, 3TZ, 3T8, 3TP, 8642995
3MH, 3VJ, 3TL, 3YH
3T2, 3VA, 3YN, 3ML, 8642996
3TC, 3MB, 3MC, 3MJ,
3VN, 3TE, 3TH, 3TK,
3MD, 3ME, 3MK, 3MW,
3VH, 3MP, 3MS, 3T7,
3YF, 3YG, 3PQ, 3YP,
3YK, 3Y9
These service packages contain both a new oil pump cover and a new pump to case gasket.
NOTICE: The new pump to case gasket cannot be used with the past oil pump cover. The past pump to case gasket can be used with the new oil pump cover, but oil will continue to exhaust out the breather.
Refer to your service manual for disassembly and reassembly procedures.