OGRE Posted December 30, 2014 Report Share Posted December 30, 2014 (edited) Rebuilding the 8.8 this spring and am not cheaping out on anything. I now have to choose a Differential. 90% street 10% DRs on the strip, Quiet operation is a must i have 2 young boys that adore this car. only 300 at the tire now but have plans for a coyote so i need room to grow up to 500+ Right now i am leaning toward the detroit tru trac. but also have an eye on yukon or eaton, and looking for info on Ford racing torsen diff. Not a fan of auburn as they are not rebuildable. I would like to stay under $500 Edited December 30, 2014 by OGRE Quote Link to comment Share on other sites More sharing options...
TurboRust Posted December 30, 2014 Report Share Posted December 30, 2014 cobra diff with carbon fiber clutches, cheap and rebuildable. I have a 31 spline one with chewed up spider gears if you want a fresh housing to rebuild cheap. Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted December 30, 2014 Report Share Posted December 30, 2014 cobra diff with carbon fiber clutches, cheap and rebuildable. I have a 31 spline one with chewed up spider gears if you want a fresh housing to rebuild cheap. Yep. why spend more money when the cobra diff will do everything you want and cost less? Quote Link to comment Share on other sites More sharing options...
Cordell Posted December 30, 2014 Report Share Posted December 30, 2014 Rebuilding the 8.8 this spring and am not cheaping out on anything. I now have to choose a Differential. 90% street 10% DRs on the strip, Quiet operation is a must i have 2 young boys that adore this car. only 300 at the tire now but have plans for a coyote so i need room to grow up to 500+ Right now i am leaning toward the detroit tru trac. but also have an eye on yukon or eaton, and looking for info on Ford racing torsen diff. Not a fan of auburn as they are not rebuildable. I would like to stay under $500 I am a fan of clutch type posi units, rebuildable is nice but if you break something or need more then clutches in an Eaton it's just more cost effective to replace it. Just my 2 cents, seems a lot of guys like the Ford parts. Quote Link to comment Share on other sites More sharing options...
DTA09 Posted December 31, 2014 Report Share Posted December 31, 2014 cobra diff with carbon fiber clutches, cheap and rebuildable. I have a 31 spline one with chewed up spider gears if you want a fresh housing to rebuild cheap. how much ? i may have a need for one. Quote Link to comment Share on other sites More sharing options...
STEVE-O Posted December 31, 2014 Report Share Posted December 31, 2014 I am putting a cobra center in mine (only like $250 from jegs) and 31 splines. Idk if it will hold up to 1000whp but we will find out Quote Link to comment Share on other sites More sharing options...
TurboRust Posted December 31, 2014 Report Share Posted December 31, 2014 $40 Quote Link to comment Share on other sites More sharing options...
zeitgeist57 Posted December 31, 2014 Report Share Posted December 31, 2014 Knife to a gunfight here, but I put a Detroit Tru-Trac into a GM Corporate rearend in an old Chevy heavy-half with a 305 and 4-spd I had. It transformed the traction on that beast for less than $300. Sounds like guys in the know are recommending the Cobra diff. Assuming it's a bolt-in, that's a no brainer to me... Quote Link to comment Share on other sites More sharing options...
OGRE Posted December 31, 2014 Author Report Share Posted December 31, 2014 I have a cobra diff already. . . after 2 years it prefers a one wheel peel out of the burnout box if the tires aren't dripping wet. and even when wet hitting the gas on a right hand turn just spins the rigth wheel. but i see you guys point, if i'm going with a clutch typ it might as well be a trac-lok. But i'm also feeling around for other options ford racing has a torsen diff and the true trac is supposed to be pretty stout too. cheapest route isn't the biggest factor od this build, i was almost ready to buy a whole bolt in 9" from moser. Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted December 31, 2014 Report Share Posted December 31, 2014 I have a cobra diff already. . . after 2 years it prefers a one wheel peel out of the burnout box if the tires aren't dripping wet. and even when wet hitting the gas on a right hand turn just spins the rigth wheel. but i see you guys point, if i'm going with a clutch typ it might as well be a trac-lok. But i'm also feeling around for other options ford racing has a torsen diff and the true trac is supposed to be pretty stout too. cheapest route isn't the biggest factor od this build, i was almost ready to buy a whole bolt in 9" from moser. You don't need a 9". 8.8 will do whatever you want it to do. who set up the rear that is in the car? Quote Link to comment Share on other sites More sharing options...
OGRE Posted December 31, 2014 Author Report Share Posted December 31, 2014 they are not a member of this board. and yeah i know i don't need a 9" it was out of frustration, to explore that Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted December 31, 2014 Report Share Posted December 31, 2014 QUOTE=OGRE;1813672]they are not a member of this board. and yeah i know i don't need a 9" it was out of frustration, to explore that Personally I would just get the carbon clutch packs and "rebuild" the diff. Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted December 31, 2014 Report Share Posted December 31, 2014 http://m.americanmuscle.com/ford-88-traclok-kit.html they give forum discounts too. its only 6%, but that is better than nothing. Quote Link to comment Share on other sites More sharing options...
OGRE Posted December 31, 2014 Author Report Share Posted December 31, 2014 thanks, i've gotten a tone of info the last couple days thanks to you guys and others. thanks for lettign me know about that discount too!! Quote Link to comment Share on other sites More sharing options...
blacksunshine Posted January 1, 2015 Report Share Posted January 1, 2015 (edited) I've run a trutrac for 8 years with no issues. Drag slick launches and other abuse. I've got enough maintenance to do and I'm glad diff rebuild is not on that list. Good luck. Sorry, forgot to mention trutrac is in 8.8 Edited January 2, 2015 by blacksunshine Quote Link to comment Share on other sites More sharing options...
Green Bastard Posted January 1, 2015 Report Share Posted January 1, 2015 cobra diff with carbon fiber clutches, cheap and rebuildable. I have a 31 spline one with chewed up spider gears if you want a fresh housing to rebuild cheap. If this is an 8.8 irs I would also be interested if DTA09 doesn't end up getting it. I need something stronger than a T2 rear in my RX-7. Quote Link to comment Share on other sites More sharing options...
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