For 1990-2009 cars

# Driveline Vibration (Inspect and Align Propeller Shaft)

Subject: | Driveline Vibration (Inspect and Align Propeller Shaft)

Models: | 1999-2001 Chevrolet Tracker

### Condition

Some customers may comment on a driveline vibration at speeds between 56-97 km/h (35-60 mph).

### Cause

The cause of this condition may be an imbalance of the propeller shaft due to misalignment of the pinion flange yoke to the differential pinion flange.

### Correction

Inspect the alignment of the propeller shaft pinion flange yoke to the differential pinion flange. Ensure that the white dot on the edge of the pinion flange and the white dot on the edge of the pinion flange yoke are aligned as closely as possible. This aligns the maximum imbalance of the shaft to the least runout point of the pinion flange and should reduce the rotational induced vibrations of these rotating components.

Important: With the four mounting bolts, there are only two mounting alternatives to get the white dots as close as possible.

1. If the two white dots are not lined up as close as possible, remove the four bolts attaching the pinion yoke to the pinion flange and realign.

Tighten
Tighten the bolts to 50 N·m(37 lb ft).

2. If the two white dots are lined up as close as possible, then further diagnosis is required.

Refer to Vibration Diagnosis and Correction sub-section of the Service Manual.

### Warranty Information

For vehicles repaired under warranty, use:

Labor Operation | Description | Labor Time
--- | --- | ---
F1280 | Propeller Shaft Assembly - R & R or Replace | 0.4 hr