Driveline Angle

Driveline Angle
Driveline angularity is the angular relationship between the engine crankshaft, the driveshaft, and the rear drive axle pinion. Factors determining driveline angularity include ride height, rear springs and engine mounts.
An incorrect driveline (pinion) angle can often be detected by the driving condition in which the vibration occurs.
^ A vibration during coasting from 72 to 56 km/h (45 to 35 mph) is often caused by a high pinion angle.
^ A vibration during acceleration from 56 to 72 km/h (35 to 45 mph) may indicate a low pinion angle.

When these conditions exist, check the driveline angles.
If the tires and driveline angle are not the cause, carry out the Noise, Vibration and Harshness (NVH) tests to determine whether the concern is caused by a condition in the driveline.