G 10 1/2 Ton Van V8-305 5.0L VIN H 4-bbl (1984)
Fluid Pump: All Technical Service Bulletins
A/T - Front Pump Bushing Walk-out
Number:
88-371-7A
Section:
7A
Date:
NOV., 1988
Subject:
FLUID LEAK CAUSED BY FRONT PUMP BUSHING WALKOUT
Model and Year:
1978-88 LIGHT DUTY TRUCKS, G AND P VANS WITH THM 400/475 TRANSMISSION
FIGURE 1
FIGURE 2
TO:
ALL CHEVROLET DEALERS
Some THM 400/475 models may experience a fluid leak coming from the converter or oil pump area. This could be caused by the front pump bushing
walking forward, resulting in fluid being forced past the pump oil seal. A new bushing was introduced that has an increased hardness specification which
results in a higher push-out load.
DATE OF PRODUCTION CHANGE: (Figure 1)
