V 30 P/U 4WD V6-262 4.3L (1987)
SERVICE PROCEDURE:
(Figure 2)
IMPORTANT:
Use new bolt (79) only with new support (654) and new piston (650). Use new piston (650) only with new support (654). Use new
support assembly (654) in previous case (10) only with previous bolt (79). Use new case (10) only with new support (654), new piston
(650) and new bolt (79). Do not reuse old Center Support (654).
Torque bolt (79) to 32 lbs.ft. (43 N-m) and assure the bolt head (79) is seated to the bottom of the case (10).
IMPORTANT:
DO NOT USE NEW BOLT (79) WITH PREVIOUS CASE (10).
Figure 3 - 1990 3L80 Model Year Case View
New Service
Description
Package
Models
Pkg - Case Assembly (Light Truck)
8629990
See Figure 3
Pkg - Case Assembly (Heavy Truck)
8629991
See Figure 3
Pkg - Support, Race, Plug, Piston & Bolts
8629994
All
Parts are currently available from GMSPO.
SERVICE MANUAL REFERENCE:
Reter to the Unit Repair section of the appropriate Service Manual for the proper Pump Bushing and Seal replacement procedures.