Shims with All-Pro Expo Pack?

I have an All-Pro Expo pack, Bilstein 5100s, and U-Bolt flip kit I'm installing. With a brand new pack do I need shims? If so what degree and why? It's my understanding they prevent axel wrap but I could be wrong. If they will help on the potential for vibration, I'm all about it. Just looking for some guidance.

Thanks.

 

Hmm, okay. I've read a lot of people having problems with centering bolts being long enough with shims to seat properly. It actually look like on my Spring Pack that All-Pro has one of those spacers that I've seen people recommend you buy, already installed?! I'm fairly new but can anyone confirm or deny? I need to call All-Pro probably the easiest thing.

 

I have the Allpro standard leaf pack and it did NOT clock my pinion angle. If you need to add shims...the centering bolt is not long enough to sit in the hole in the perch. You have to get new centering pins and add a spacer to the pin to get enough of the pin sticking through the shim for it to engage the hole in the perch.

http://www.autoandtrucksprings.com/products/Center_Bolt_Head_Lengthener_2_Pcs-1662-0.html

 

I'm running the Expo's and I have very little vibes & no shims!

Also, 5100's won't fit with the Expos as they are too short, they'll top out, it'll be okay on the road but I recommend getting new shocks!

 

I got the 3-4" 5100's vice the 2-3" 5100's, I think the best thing is for me to call All-Pro.

 

Oh okay