RiCe_KiLlEr

my buddy has an 05 gt with a roush supercharger, he is wanting to change out the gears and im not too familiar with the 05+ mustangs. he is wanting 4.10s but i was thinking that 4.10s on a supercharged would be too much, i was telling him to think about 3.73 or 3.90s. what would be his best bet? thanks for yalls input

945LSTANG

how much power is he making? i would say the 3.73s if hes making moderate power or possibly even 3.55s if he has a more aggressive setup.

RiCe_KiLlEr

right now he only has the roush supercharger and a catback exhaust. hes getting lt headers, o/r h-pipe n wants stage 2 blower cams. right now he said hes making a lil over 400whp. with those mods what would u go with?

jRock617

The Roush is a roots blower, he should stick with 3.73s, especially if its a DD. Anything steeper he's going to have some traction issues. If he decides for anything steeper, make sure he has a good set of tires and other suspension mods to keep him planted on the ground.

945LSTANG

i would probably give the 3.73s a shot.