Should I just do the same or will I have to check it first? I never did this before so I am not too informed on what to do.

 

2/4 drop here, 2" hangers and shackles in the rear and I'm running 6* shims fat end forward giving me about -1* angle. But mine is 2wd. As mentioned, measuring is the only way to know for sure.

 

Ok all this " Setup" discussion makes me have to ask, What is the best way to set up the pinion angle???

I have purchased 6* shims, not sure which way to face them.

I have a degree finder, how and where do i exactley use it? Im not sure but would love to know the correct way to figure this out. Thanks Bretheren !

 

Iv been battling pinion angle my self and over the past week I think I have it down now.ha
1st check your drive shaft angle. In my case I have a 2 peice drive shaft and I measure the rear one. for instance I got +1* meaning that the rear part of the drive shaft was facing upward.
2cd get the yoke from the differential to where the caps are facing up and down, then get a 13/16 socket( this is what I used) and put it flush against the u joint end. in my instance it read -4 meanding the differential was pointing downward slightly.
lastly take you 2 measurements and add them for your pinion angle.(-4*+1*) equal -3*

 

I am having the same symptoms right now and it's been driving me crazy.
I just got a 3/6 drop and the vibrations are really bad.

My rear end is facing upward and driveshaft leveled. No signs of wear and tear. How can I find out my angle or shims I need ?

 

Tim, make sure your truck is parked on level ground and at ride height when you do this. I always use a flat spot on the diff housing to figure from but it's "proper" to use a flat on a yoke since you know it's gonna be perpendicular to the pinion gear and will give you true pinion angle, but I've always gotten it right my way too.

If you have none or positive pinion angle, the fat side of the shim goes to the front. If you're too negative, it goes toward the rear. I always replace the leaf spring pin with a longer one if I go over about a 3* shim to make damn sure the rear stays located. I had to run 6's in my old truck dropped 4/5.