Regear 08 TRD O/R (e-locker diff)

I'll bet ECGS can assemble them for you for cheaper than most if not all shops (unless you have a friend discount or something). My regear came to almost $3000 but I added an arb up front as well.

Personally I think 4.88's go well with the 5 spd autos, but I am also running a 33" tire. I lost a couple mpg though (down to 16-17 mpg now). That makes the motor really peppy. Will get up and go at just half throttle and performs well crawling in 4-Lo. If you have a 6spd manual I probably wouldn't go with 4.88's unless you are running tires bigger than 35's the hwy rpm's get really high on them because of the lower geared over drive.