Caprice V8-307 5.0L (1987)
Seals and Gaskets: Technical Service Bulletins
A/T - New Transmission Oil Pan Gasket
Number:
87-52
Section:
7A
Date:
JAN., 1987
Subject:
NEW TRANSMISSION OIL PAN GASKET FOR THM 200C AND THM 200-4R
Model and Year:
PASSENGER CARS WITH THM 200C OR THM 200-4R EL CAMINOS WITH THM 200C OR THM 200-4R
THM 200C TRANSMISSION I.D. NAMEPLATE
THM 200-4R TRANSMISSION I.D. NAMEPLATE
TO:
ALL CHEVROLET DEALERS
A new latex-coated cellulose (hard fiber material) pan gasket enter production on the dates listed below. The new gaskets improve sealing capability by
better withstanding fastener torques.
Date of Production Change:
(See Illustrations)
THM 200C: May 29, 1986, Julian Date 149 THM 200-4R: June 23, 1986, Julian Date 174
Any model year THM 200C and 200-4R transmissions with a continuous raised rib pan can be serviced with the new cellulose gaskets. When servicing a
THM 200C or THM 200-4R which has the former flat surface pan, refer to Chevrolet Dealer Service Bulletin 83-117 Section 7A dated Dec., 1983 or
Chevrolet Dealer Service Bulletin 84-107 Section 7A dated April, 1984 (THM 200-4R) which review installation of a raised rib pan.
Some service overhaul packages may contain a latex-coated cork (soft material) gasket, which should not be used with a raised rib pan. The new hard
fiber material gasket can be ordered separately using the appropriate part number listed below.
SERVICE PARTS INFORMATION
THM 200C Gasket
Trans. Oil Pan (Cellulose)
P/N 8648529
THM 200-4R Gasket Trans. Oil Pan (Cellulose)
P/N 8657387
When replacing the oil pan gasket it is critical that a torque wrench is used to tighten the hex head pan screws. Hand torque all THM 200-4R hex head
screws 8-14 N-m. (6-10 ft.lb.) and all THM 200C hex head screws 10-16 N-m. (7-12 ft.lb.). This is a new torque specification for the oil pan bolts on the
THM 200C.
