So im putting in my 4.88 gears in my truck but not sure where to buy from. i found american truck with cheap gears by motive. And any one from jersey with a good install shop. The guy i go to usually failed me the past two times so i need to change

 

I've heard good things about this place, I'm in the market for 4.88's myself.
http://www.diffsonly.com/catalog/pro...ucts_id=168250

 

There is accu auto parts
http://www.accuautoparts.com/index.jsp

or Randys Ring and pinion
http://www.ringpinion.com/

Ive used both and had good results

 

I prefer Yukon now that I've blown 2 genuine gear pinions apart, but split the carrier in two instead of the Yukon pinion.

 

Talk to Wayne at diffsonly.com and ask him for a quote and what you need. I just got mine from there: Yukon 4.56 front and rear with all the installation kits and was cheaper than buying some motive or genuine at 4wheelparts.com

The guy is awesome to deal with too!