C 30 1 Ton Pickup 2WD V8-350 5.7L VIN M 4-bbl (1983)
Clutch: All Technical Service Bulletins
A/T - Forward Clutch Plate Assembly Modifications
85-63
7A (VIIc)
APR., 1985
Subject:
FORWARD CLUTCH PLATE ASSEMBLY
Model and Year:
1982-85 THM 700-R4
TO:
ALL CHEVROLET DEALERS
At the start of production of the 1985 THM 700-R4 transmission, ALL MODELS will be built with thicker steel clutch plates and thinner composition
clutch plates in the forward clutch assembly.
NOTICE:
THE THICKNESS CHANGE IN THE PLATES DOES NOT AFFECT THE OVERALL "STACK UP" DIMENSION FOR THE
FORWARD CLUTCH ASSEMBLY WHEN USED IN SETS AS SHOWN BELOW. DO NOT MIX THE NEW PLATES WITH
PLATES FOR TRANSMISSIONS BUILT PRIOR TO THE 1985 MODEL YEAR. USE A MICROMETER TO INSURE THE
PROPER PLATE USAGE.
Your parts catalog should reflect information contained in the chart below.
PART NUMBER
PART NAME
THICKNESS
MODEL YEAR
8642167
FORWARD CLUTCH PLATE
1.97 mm (.077")
1982-1984
8647350
FORWARD CLUTCH PLATE ASSEMBLY
2.03 mm (.079")
1982-1984
8654325
FORWARD CLUTCH PLATE
2.29 mm (.090")
1985
8654324
FORWARD CLUTCH PLATE ASSEMBLY
1.78 mm (.070")
1985
8642991
OVERHAUL REPAIR PACKAGE
1982-1984
8647980
OVERHAUL REPAIR PACKAGE
1985
