4.10s in a 96 GT

no reason to get an almost stock NPI mustang high into the rpm's that fast - 4.10's would be excessive.

CobraRed_96_GT said:

no reason to get an almost stock NPI mustang high into the rpm's that fast - 4.10's would be excessive.

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I would agree. It would feel weird with 4.10's and not much power. I would recommend some more mods first. Where is the elevation and your 60' times?

Would 4.10s be to excessive with my mods? or 3.90s better?

Juecke - fell free to run 3.90/4.10/4.30's if you wish. Only reason i would nix 4.10's would be when you make peak power that low in the rpms and you haven't exhausted you other bolt on options yet. Anything with ported heads can benefit from 4.10's for sure

A long time ago, I mean around 2001. I ran 3.55's in my 96 4.6L 2V auto TBird. I then moved on to 3.73's. Even then I thought 3.73's was not enough gear, they were good enough for .5 drop in E.T. and a gain of 2 MPH though. Granted a TBird is quite a bit heavier than a Mustang.

With a near stock car NPI auto car, I would start at 3.73's but I wouldn't be afraid to go with more gear than that especially if you will mod the car.

Save your money on the gears and do the PI swap first.