It all depends on the application. You dont want more than 3.73 on an auto. What will happen, also depending to your tire size, is that anything above 3.73 you will run out of gear at the track. What will happen is that you will enter overdrive and that is really risky because you can brake the band if you enter it at wot. For instance, i have 315/30/18 in the rear and if i had 3:73, that would mean i would be at the end of 3rd gear at 118.1 MPH. if i had 3:90 i would be at 113.0 MPH. I run nitrous and i trap speeds of 108-115. I would need something that keeps me in that range which would be 3:73. It all depends on your set up and what you want to have.
How do you trap between 108 and 115? Thats a pretty wide range I'm usually with in a few mph.
Uhh I have an auto and with 274/45/17s and 4.10s I went 120+ in 3rd with O/D locked out. I now have a built auto and though I know its still not great on the tranny I **** into OD at the track and trap 128.
4.10s with an automatic...wow hope you like buying gas!!!
I am thinking about buying Motive 3.90 gears for my 2003 mustang GT auto, has anybody had any experience with these gears, if so are they anygood??? any other suggestions on what type of gears are good
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