Suburban 1/2 Ton 2WD V8-454 7.4L (1987)
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Harsh N-D, P-D Shifts
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Slipping on Hard Accelerations
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Forward Clutch Distress
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No Upshift
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1-2 Tie-Up/Lo-Rev Clutch Distress and 2-4 Band Distress
Control Valve Body Checkballs
GMC NUMBER:
88-T-16
GROUP:7A - Automatic Transmission
DATE:
May, 1987
CORPORATE
NUMBER:
867103
SUBJECT:
PROPER LOCATION OF THE FORWARD CLUTCH CHECKBALL
MODELS:
ALL 1987 LIGHT DUTY MODELS AND 1988 C/K MODELS WITH THM 700-R4
AUTOMATIC TRANSMISSIONS
FIGURE 1 - CHECKBALL LOCATIONS ON TRANSMISSIONS WITH AUXILIARY VALVE BODIES
BULLETIN COVERS:
Service information on the correct location of the forward clutch checkball (#12-Figure No. 1) and the possible effects of installing the checkball in the
wrong location.
