Quaife differential 
Quaife differential
Joined: Mar 2005
Posts: 1,599
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From: 32639 Groesbeck HWY. Fraser MI 48026
Those are very expensive and are popular with the imports. A Torsen or Truetrac would be my next choice if you are looking for a worm gear style differential.
Thread Starter
TECH Apprentice
Joined: Aug 2006
Posts: 348
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From: Atlanta
Scott all I know is there are no clutches or springs just gears. So yes I would expect there are worm gears involved.
Joined: Mar 2005
Posts: 1,599
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From: 32639 Groesbeck HWY. Fraser MI 48026
The Truetrac or Torsen are the same design as a Quaife and I have no knowledge if one is stronger that the next. I guess it all depends on your budget, Average Truetrac is $450.00 and Last I heard a new Torsen is around $750.00.
9 Second Club
Joined: Nov 2003
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From: Norn Iron
Quaife make very nice diffs, and usually have steel billet carriers. I think a lot of them come with a lifetime warranty too, although no doubt there are catches.
That said....Im using a Ford Racing Torsen in my 8.8"....so far its great, and cheap IMO.
I wouldnt even consider a locker or plated type diff.
That said....Im using a Ford Racing Torsen in my 8.8"....so far its great, and cheap IMO.
I wouldnt even consider a locker or plated type diff.
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Joined: Nov 2003
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From: Norn Iron
When the tru-trac breaks...what gives ?
In any of the pics Ive seen, I think its usually the cheap cast carrier that fails ??
I would have no hesitation in thinking a Quaife would be stronger than any typical cheap US diff, or a plated style diff that retains a diff pin.
A friend broke his Unitrax Viper diff last year, and he's switching to a Quaife for his rebuild. Its circa 900rwhp......he might even go faster than me some day
If I couldnt have got my 8.8" Ford Torsen so cheap, I would have bought a Quaife.
As with you John....absolutely no way in hell will I ever have a spool in my car again, and the thought of a locker doesnt have much more appeal.
The spool was only a temporary measure anyway, but I never thought they would be so bad..
Add to that, it didnt improve my 60fts or traction one bit.
In any of the pics Ive seen, I think its usually the cheap cast carrier that fails ??
I would have no hesitation in thinking a Quaife would be stronger than any typical cheap US diff, or a plated style diff that retains a diff pin.
A friend broke his Unitrax Viper diff last year, and he's switching to a Quaife for his rebuild. Its circa 900rwhp......he might even go faster than me some day
If I couldnt have got my 8.8" Ford Torsen so cheap, I would have bought a Quaife.
As with you John....absolutely no way in hell will I ever have a spool in my car again, and the thought of a locker doesnt have much more appeal.
The spool was only a temporary measure anyway, but I never thought they would be so bad..
Add to that, it didnt improve my 60fts or traction one bit.
On mine I broke teeth off of the center gear. I knew all along my tru-trac was a weak link in my 9 inch but as stated I didn't want any of the other options.
9 Second Club
Joined: Nov 2003
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From: Norn Iron
Do Ford Racing make a Torsen for the 9" too ??
I think the one in my 8.8" is great.
just took the rear end apart to swap gears, and both diff, and new Mark Williams shafts look fine
Im very pleased to see that !!!!! The Moser shafts had a habit of twisting
I think the one in my 8.8" is great.
just took the rear end apart to swap gears, and both diff, and new Mark Williams shafts look fine
Im very pleased to see that !!!!! The Moser shafts had a habit of twisting
the quaife is a really nice diff. you can't even compare a true trac to a quaife. very very high quality and i believe it has a lifetime warranty even when you're racing it. you broke the trutrac with 940rwhp? dam that's still pretty good...im surprised you're not twisting the splines on your 31 spline axles.
Quaife is known for their racing support and standing behind their product. They are expensive, so it really depends on how bad you plan to beat on it. If you are out on road courses and getting after it on the regular, you will benefit from the extra support.
If you plan on just drag racing/street driving the car, I doubt you will get any benefit from the extra expense.
If you plan on just drag racing/street driving the car, I doubt you will get any benefit from the extra expense.
I knew when I put my 9 inch in with a tru-trac my differential was going to be my weak link in my rear but it lasted almost 2 years with 900+ hp in a 4000 lb car so I am not complaining about my tru-trac. I will definitely stay with a differential but will consider going with a Quaife if it will be stronger and possibly not break on me.
Quaife ATB Differential Limited Lifetime Warranty
Autotech Torque Biasing Differential Lifetime Warranty: Autotech warrants each new Quaife ATB Differential against defects in manufacture, material, workmanship, and wear-out when used in the vehicle application for which it was originally designed, on any motor vehicle, under any and all operating conditions, including racing, for as long as the original purchaser, or any subsequent purchaser owns the differential. The original purchaser must complete and mail in the accompanying warranty registration form within 30 days of the purchase date to qualify for this warranty. The registrant must present a copy of this warranty together with a copy of the original receipt to the service outlet or parts store from whom the differential was originally purchased when making a claim for replacement or repair. All warranty claims submitted must include proof of purchase. Failure to provide proper documentation renders warranty null and void.
Autotech Torque Biasing Differential Lifetime Warranty: Autotech warrants each new Quaife ATB Differential against defects in manufacture, material, workmanship, and wear-out when used in the vehicle application for which it was originally designed, on any motor vehicle, under any and all operating conditions, including racing, for as long as the original purchaser, or any subsequent purchaser owns the differential. The original purchaser must complete and mail in the accompanying warranty registration form within 30 days of the purchase date to qualify for this warranty. The registrant must present a copy of this warranty together with a copy of the original receipt to the service outlet or parts store from whom the differential was originally purchased when making a claim for replacement or repair. All warranty claims submitted must include proof of purchase. Failure to provide proper documentation renders warranty null and void.
Got one & selling it..
Too expensive to be sitting since its now my spare!
$3000
Will also include brand new GM Getrag Z06 shot peened 3:42 ring/pinion in case you prefer 3:42's to the 3:90's! And an extra 300M hardened passanger side shaft!
Too expensive to be sitting since its now my spare!
$3000
Will also include brand new GM Getrag Z06 shot peened 3:42 ring/pinion in case you prefer 3:42's to the 3:90's! And an extra 300M hardened passanger side shaft!
