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89Superbird5spd
04-20-2004, 05:35 PM
hey guys, i know a guy who is gonna sell me the whole rear differential from an 03 cobra for about 130-150 dollars (355 gears). good or bad buy...what do you guys think? im thinking its a good buy. i have an '89 5spd.

aplvlydrtybird
04-20-2004, 06:11 PM
if its in good shape then i say hell yea

Rob Noth
04-20-2004, 06:31 PM
That would be a good buy, except I'm pretty sure the 03 Cobra IRS has 31-spline half-shafts, and ours are 28-spline. But you might want to double check that because I'm not totally sure.

fast Ed
04-20-2004, 08:46 PM
Rob is correct, 2001 and newer SVT Cobras use a 31-spline differential. So that would have to be substituted with a 28-spline unit, or you could get in on the group purchase of 31-spline GKN half-shafts going over on TCCoA.

cheers,
Ed Nicholson
SCCoO

89Superbird5spd
04-20-2004, 10:00 PM
so i just need to get the 28-spline half shafts to replace the 31-spline half shafts that are already in there to make it work?

dodgetruck91
04-20-2004, 11:52 PM
hey 89bird, completely off topic but do you ever make it to union grove here in WI? i will be running there a lot this summer and was gonna see if maybe you wanted to meet up if your ever up here.

89Superbird5spd
04-21-2004, 01:47 AM
never been there but im always game to go anywhere in my bird. maybe we could meet up at the great lakes track sometime soon

fast Ed
04-21-2004, 09:36 AM
so i just need to get the 28-spline half shafts to replace the 31-spline half shafts that are already in there to make it work?

No, your car has 28-spline shafts and differential right now. The 03 Cobra pumpkin you want to get has a differential with 31 splines. So you need to change the side gears in that diff., or the complete diff., or get 31-spline axles for your car.

cheers,
Ed N.

89Superbird5spd
04-21-2004, 10:14 AM
which would be easiest/cheapest to do?
ive never dealt with gears before, so i dont know what to do. i know i could do the work involved though
thanks guys

dodgetruck91
04-22-2004, 01:27 AM
never been there but im always game to go anywhere in my bird. maybe we could meet up at the great lakes track sometime soon

shoot me a email: Dodgetruck91@wi.rr.com or AIM: Blown xr7 cat
If you got time to head up. let me know.