8 1/4 rear end.. ordering.. gift advice please help

[Lynx331]

Hey guys i just have a quick question, My dad has a 74 duster with a 8 1/4 rear end in it, he blew the stock one and put the 8 1/4 in. The only problem is its an open diff. Im looking into buying a posi unit for him for it, ive found a trac-lok from a 91-01 Jeep, with 29 splines.. will this fit in his rear end? The only problem is i dont know how many spline his axles are? I look for a detroit locker for him and found nothing made for the size rear end. Any ideas guys.. His birthday is this sunday so i would like to try and get it by then.

Thank you.
Mike

[rumblefish360]

This is a better way to go about it if your wallet can handle it. Sunday is very soon. Good gift idea!!!
http://chucker54.stores.yahoo.net/difas.html

[Lynx331]

Awesome!! That would be so much better than buying him a stock used one Now the only problem is the axle splines, im assuming its a 27 spline but im not sure.

[dwc43]

The Trak Loc from the Jeep wont work. Too many splines. Go to Randy's and get a Sure Grip. Lokers don't work real well on the street either .Quite noisy. www.ringpinion.com

[mopar_nocar]

here's a company i have had good luck with:

http://www.gearsrus.com/

i would get an "install" kit for it as well, if not a master kit....sunday is quick, but that's why fed ex was invented i guess. good luck, great gift idea.

sb

[Lynx331]

im acutally really considering the auburn.. i completely forgot about them, my buddy raced his 10 sec mustang for year on the auburn and it help up great... and cons on the auburn?

[dodger1]

Clutch-type ltd.slips (Eaton Posi types) are rebuildable. Auburns aren't. That said, some folks claim you can pretty well replace a worn-out Auburn for about the same cost of rebuilding a clutch-type, Auburn being one of those folks. And for mild street use, the Auburn seems to be quite reliable, as it has for me in my 360 Mirada for 5 years now. The new H.D. unit in the Mancini catalog might indeed be the answer. As for the spline count, I think all pre-90 8 1/4 s are the same, 27 spline?