The Professional Choice

Do I need to worry about Pinion angle?

I have a 1970 Ford f-100 2wd short box with your complete lowering kit (4 inch rear) . Is my pinion angle now changed? If so what is the best way to address this? Thanks, jim


Submitted on 2013/09/06 at 8:06 am | In reply to Jim Cappel.


Yes your pinion angle has changed after installing the 4″ rear kit. Your pinion angle also changes when you carry a load or pull a trailer or change the ride height for any reason. Pick up trucks are designed to operate in a very wide range of pinion angles and you don’t really need to worry about it until you get to the 6″ or more drop. Generally if you have a pinion angle issue you will feel a vibration while driving, but if everything feels normal you good to go!


2 Responses to Do I need to worry about Pinion angle?

  1. I just bought a 2001 f350 dually with a full drop kit in the rear that has a momentary vibration and audible growl at road speeds when you accelerate or decellerate. what could cause this.

    • Edward,

      First thought is a U-joint that is dry or worn and is complaining when loaded (accelerate/decelerate). Normally when you have a pinion angle problem you get a vibration at some speed all the time. Inspect the U-joints and service if you need to. Hope this helps.


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