[storch]

do the U jounts start to make noise at over 60,000 miles.

Have some odd noises, can really tell with the doors off.
A slight whisle or Squealing and fluttering noises.

2008 ulimited automatic with ripp headers and an aftermarket exhaust in addition to 3.5" of lift.

 

[Slippery]

With 3.5" of lift, you need to replace the drive shafts with double carden u joint shafts like these:

http://www.genright.com/ProductInfo.aspx?productid=ADS8450#.Uf_B4W2e1jg