G 2500 3/4 Ton Van V8-305 5.0L (1990)
Clutch: All Technical Service Bulletins
A/`T - Revised Direct Clutch Pack
GMC NUMBER:
90-7A-65
GROUP:
7A Automatic Transmission
DATE:
June, 1990
CORPORATE
NUMBER:
077122
SUBJECT:
CLUTCH PLATE PRODUCT IMPROVEMENT
MODELS:
1990 C, K, R, V, P TRUCKS AND G-VANS WITH 3L80 (THM 400)
BULLETIN COVERS:
Some HYDRA-MATIC 3L80 (THM 400) models have a new direct clutch pack which includes two different steel plates that will increase minimum
running clearance, reduce drag and prevent higher temperatures.
Figure 1
DATE OF PRODUCTION CHANGE:
(Figure 1) Beginning April 3, 1990 (Julian Date 093) all 1990 FAA, HCA, HFA, HHA, LXA, MTA, MWA, MXA, MZA, SBA, SHA, SJA, TAA, TBA,
TDA, TFA, TKA, TMA, TNA, TRA models will be built with this new clutch pack.
SERVICE PARTS INFORMATION:
Part
New
Previous
Part Name
Number Quantity
Quantity
8625197
3
5
Plate-Clutch
(.0915 Flat) (622)
8623849
2
0
Plate-Clutch
(.0775 Flat) (622)
NOTE:
Install three 8625197 Steel Plates first, then two 8623849 on top. Alternate steel and composition plates as shown in figure 3. All 1990
vehicles built with previous quanfity can be switched to the new quantity.
