Most lowered trucks will have a pinion angle that is too shallow. This causes the driveshaft to vibrate and can cause premature wear on universal joints. To correct the pinion angle, a shim kit is required. The shim kit will come with instructions, but here is a quick overview of how to set the pinion angle on a lowered truck.
1. Jack up the truck and support it with jack stands. Remove the driveshaft.
2. Measure the angle of the pinion with a protractor. It should be between 2 and 4 degrees.
3. Install the shims according to the instructions that come with the kit.
4. Reinstall the driveshaft and lower the truck.
5. Test drive the truck to make sure the vibration is gone.
For your interest: Does a Rhombus Have 4 Right Angles?
Frequently Asked Questions
How do I adjust the pinion angle?
Lock the wheel NINE degrees in the opposite direction of your desired final pinion angle and measure the drive shaft angle. Subtract nine degrees from the drive shaft angle; that is your new desired final pinion angle. Note: If you have a different numberof teeth on the front and rear of your differential, use...
How do you correct a rear axle pinion?
You can correct a rear axle pinion by adding shims between the housing and springs.
What is the correct pinion angle for preload?
Negative one degree.
What is the ideal pinion angle for a drive shaft?
The ideal pinion angle for a drive shaft is 3 degrees or less. Increasing the transmission to 5 degrees would have been a poor choice, leading to premature universal joint wear.
How do you adjust pinion angle on a drive shaft?
The angle of the pinion is adjusted by adding tapered shims between the semi-elliptic springs and the mount on the axle housing.
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