Problems with my Differential

no, the gt's housing is bigger. you'll have to get a 7.5" differential. www.gefracing.com has them pretty cheap, or you can take the opportunity to upgrade to a 8.8 if money permits.

the 8.8 will work......but it requires some other stuff.....I'd jump on it

I myself am shopping for an IRS from a Cobra for some corner carving. A straight axle is much better for straight line acceleration (drag strip).

98cobraclone, the 8.8 rear would work great, but an 8.8 diff won't fit into a 7.5 housing, the housing is way too small

Did you just break the internal differential, or the whole pumpkin shell?

Either way, if the diff is wrecked, your gears could be messed up as well. To do from an open diif to a T-Lok or posi diff would be no less than $190, plus gears - around $180, plus the insall kit, another $80 or so, without scouring the net for deals. Then figure no less than $200 for install, and that's with looking everywhere for a reputable dealer.

All 7.5" and 8.8" rear ends all have specific parts for their size. To my knowledge you can't interchange parts, including the axles. Keep in mind that you can go up to about 400HP on the 7.5" rear end, and a lot more on the 8.8". So if you plan to up the HP on your Mustang, you have to figure what's best for YOUR comfort level.

8.8" rear ends can be had for as little as $200, but they need to be rebuilt (diff, gears, install kit, axle seals). Or you could look at http://www.mustangsalvageparts.com/... you get the quad shocks as well. My $.02.

Sorry, I was under the impression that he was gonna change the whole rear, pumpkin and all