Recently added 3" rear blocks. Replaced the U bolts and torqued to 90 lb/ft and re torqued after 500 miles. I drive 90% highway 10% city, never off-road or even dirt roads. I have the 4.2 with a 5 speed, so I'm not sending a ton of power to the rear anyway.

Should I expect any issues?

 

At the risk of sounding overly verbose - No.

MGD

 

Works for me. Thanks!

 

Nope! I've got 5" blocks with my lift, the 5.4, drive my truck pretty hard, and I've yet to experience any axle wrap.

 

Nope same here i have6 inch fab tech 35x12.50x20 no axle wrap