Originally Posted by esfourteen

Top end you likely won't find out, jnaut has reportedly gone 167mph with his 4.08's so realistically it is not an issue.

You don't have to change out the gears when you get your SC, you just might have have more traction issues. This would be a bigger concern for people going with turbos because the torque comes on so strong they struggle for traction as it is, 4.08's would be tough. The SC is very linear power so I think it's controllable, just get some bigger/stickier rubber and you should have no problems.

Speaking about the manual transmission, from what I remember 80MPH in 6th gear is about 3200-3300 with 4.08's, +300rpm over the factory 3.69 gears.



A rough price for install provided you have all the parts would be about $400 labor. You may or may not need shims from nissan to get the proper tolerances during the install which your shop would let you know about, they don't cost very much though.