1965/73 Cheap Build Up

[Strodder]

Originally Posted by daverod

I notice it when I go above 55-60. It's a vibration. At first I thought it might be my front ball joints. One was bad. Now I'm pretty sure it coming from the rear. All the joints on my drive line are good or new. It just seems like somthings not lined up right. I have never had it aligned. Just not sure what to try next? Feels like my drive line might not be balanced? Truck is lowered quite a bit in the back. I'm pretty sure my angles are not normal. What would a bad pinion angle do? Could be that. Not sure how to change it. Maybe shim the trans up or down. The joint in the middle is fixed

Sounds like it is the pinion angle. Here's some good info. Also GOOGLE it. There's lots of info out there.

http://www.iedls.com/asp/admin/getFi...&TID=28&FN=PDF