Axle Wrap??
 

So after installation of 6in lift, (i have already ordered ladder bars, just not installed yet)... I feel a drivetrain vibration in 4th and 5th when i floor it, it feels more like a tranny issue. But a tranny issue dosent make sense since it has been freshly rebuilt and 4-5 are not on same shift fork and on opposite ends of tranny. So axle wrap is the only thing i can think off. but was wondering if yall had any other ideas... I also repace rear pinion, and diff fluids to synthetic 75w-90 while doing lift.. Thank yall

What exactly are we talking about: "6 inch lift?"

6 in suspension lift kit, also axle is a 3.54 (3.55) Posi

So, new leaf springs?

New leafs in front, and add a leaf in rear.. with add a block... and new u bolts al the way around, and every thing is torqued to spec adn is fixin to be re torqued

What did the pinion angle end up at?

Good ? ill check that when i get back to the shop tommorrow