K 3500 Truck 4WD L6-292 4.8L (1985)
Extension Housing: Technical Service Bulletins
A/T - 4 (Of 6) Case Extension Studs Replaced By 4 Bolts
Number:
85-18
Section:
7A (VIIc)
Date:
Dec., 1984
Subject:
FOUR (4) CASE EXTENSION STUDS REPLACED BY FOUR (4) BOLTS
Model and Year: 1984-85 THM 475 FS AND HR
TO:
ALL CHEVROLET DEALERS
REAR CASE EXTENSION
Starting September 20, 1984 (Julian Date 264), on the THM 475 FS and HR models four (4) of the six (6) studs in the rear case
extension were replaced with four (4) bolts as illustrated below.
When servicing any of the models listed above which have the six (6) studs and replacement is required, replace them with bolts, P/N
9424320.
