I got a friend who is currently runnin 4.10s in his iroc. I know alot of guys are running 3.73s but he isn't sure what gears he should get. His motor has some work heads/cam, bored i believe not much. what do you guys think?

 

4:10's are really steep. if he is using it for a daily driver, i wouldn't recommend those. does he have a 9 bolt or 10 bolt rear?? if its the 9 bolt then 3:45's will work really good!

 

well he is currently running the 4.10s and is looking for another set cause its way to tall for the car, i was thinkin 3.73s since so many people seem to have a good experience with them but i figured you guys would know a bit more than me about this. he also has a 2500 stall and is currently running a stock rearend thats a 7.5 right? anway thanks guys

 

stay in the 3.4x range for automatic and if he has TPI