What gears to use....?

[Ethan@S3M]

Just put 3.73's in with my straight axel. We have FRPP gears for 100.00 on clearence.

[BurnTire]

I have 3:73's in my setup.

It all depends on what your final trap speed is going to be and planned shift points. If you use 4:10s on a 28" tire and trap around 130MPH plan on the RPMs being around 6200. I base this on a 29" tire height due to the slick growing. When I went from a 26" to a 28" tire on my stock 3:55s it did not affect my ET in a negative manner.

The 3.90 gears have some history of breakage and whine so I would stay away from those.

Check out the gear calculators here.
http://www.highperformancestangs.com....php?page=calc

[OH3MGSVT]

I have 3:73's in my setup.

It all depends on what your final trap speed is going to be and planned shift points. If you use 4:10s on a 28" tire and trap around 130MPH plan on the RPMs being around 6200. I base this on a 29" tire height due to the slick growing. When I went from a 26" to a 28" tire on my stock 3:55s it did not affect my ET in a negative manner.

The 3.90 gears have some history of breakage and whine so I would stay away from those.

Check out the gear calculators here.
http://www.highperformancestangs.com....php?page=calc

You hear that Tony? 3.90's = bad lol. but back to the original thread, I think 3.73's will be fine, that's what I'll be going with when I get S/C

[Jeremy]

You hear that Tony? 3.90's = bad lol. but back to the original thread, I think 3.73's will be fine, that's what I'll be going with when I get S/C

Shananagins!!! I have them and the only problem is a wine. I believe that is because of how its setup. Im not all the easy on my cars either.

[AZSonicSnake]

You hear that Tony? 3.90's = bad lol. but back to the original thread, I think 3.73's will be fine, that's what I'll be going with when I get S/C

haha. only complaint i have had is the whine. otherwise, the stock posi unit peaced out with the 3.90's in there.

[BurnTire]

I am actually happy how quiet my car is with solid bushings all around. I can't tell much difference from the IRS sound wise. So much for these so called experts who wished me good luck with the setup and said it would be noisy.

[4Jenna]

Just put 3.73's in with my straight axel. We have FRPP gears for 100.00 on clearence.

WOW thats a great deal!

[gip99gt]

My bag I thought he had a GT. If he has a 99-01 Cobra than 4.30's or 4.56's. Depends on you.

[wickedcobra]

My bag I thought he had a GT. If he has a 99-01 Cobra than 4.30's or 4.56's. Depends on you.

None of the above. I have an 03 Cobra.

[gip99gt]

03 Cobra solid axles = 4.10's