G 20 3/4 Ton Van V8-305 5.0L VIN H 4-bbl (1984)
Center Support: Customer Interest
Propeller Shaft - Vibration Between 35 to 55 MPH
84-260
4A
OCT., 1985
Subject:
VEHICLE VIBRATION
Model and Year:
1983-84 CHEVY VANS AND BEAUVILLES AUTOMATIC TRANSMISSIONS - 2 PIECE PROPSHAFT
TO:
ALL CHEVROLET DEALERS
Some 1983-84 G-20 vans may experience a vehicle vibration between 35-55 mph or a shudder at vehicle launch. This condition is generally isolated to
vans with either the THM 400 or 700-R4 automatic transmission and equipped with a two-piece propshaft.
If this condition is encountered, inspect the propshaft and u-joint using the diagnosis chart in Section 4A of the Light Duty Service Manual. If the
condition is still present after this inspection and the necessary repair, use the following procedure to determine if the propshaft is straight from the
transmission to the rear axle.
1.
Raise the vehicle on a hoist.
2.
Stand behind the vehicle and sight down the propshaft from the center of the rear axle to the transmission.
ILLUSTRATION #1
