Suburban 1/2 Ton 2WD V8-454 7.4L (1987)
Clutch: All Technical Service Bulletins
A/T - Forward and Reverse Engagement Shift Feel
Number:
88-19Number: 88-19
Section:
7A
Date:
May, 1987
SUBJECT:
FORWARD AND REVERSE ENGAGEMENT SHIFT FEEL MODELS: 1987 LIGHT DUTY MODELS WITH THM 400
AUTOMATIC TRANSMISSIONS AND
1988 C/K MODELS WITH THM 400 AUTOMATIC TRANSMISSIONS
TRANSMISSION MODELS:
FDA, FFA, FJA, FMA, FNA, FPA, FQA FTA, FUA, FWA, FYA, FZA, LAA, LBA LCA, LDA, LFA, LHA, LJA, LKA, LMA LRA, LSA, LTA, LUA,
LWA, LZA
BULLETIN COVERS:
Certain 1987 and 1988 light duty models with THM 400 transmissions (refer to list above) have new forward and direct clutch assemblies with a
"dished" steel clutch plate. This new design clutch plate improves forward and reverse engagement shift feel by cushioning piston apply.
Figure No. 1 - THM 400 TRANSMISSION IDENTFICATION INFORMATION
DATE OF CHANGE: (Figure No. 1)
July 22, 1986 (Julian Date 203) for listed 1987 THM 400 transmission models.
Figure No. 2 - FORWARD CLUTCH ASSEMBLY
