My questions are, what are the differences between the gears, prices and places to get, pro/cons etc. Same thign with the throttle body spacer, what exactly does it do etc.
Thanks

 

Just finished getting 4.11's in my 4x4... damn expensive @ $1400, but that included adding posi to the rear which did not have it. check out this site for rpm info & gear changes http://www.differentials.com/calc.html

I hear throttle body spacers are a waste of $ but I think it depends on the motor you have... 5.2/5.9 mag motor = waste of $

 

Yep, I think spacers are garbage and a total waste of money. What they do is give you a tad bit extra room for airflow, but it's never proved to do anything significant IMO, and the tend to interfere with aftermarket CAI's...

~Amanda