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Unread 08-26-2005, 02:27 PM   #1
chieeeeef
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Join Date: Aug 2005
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Detroit TrueTrac on Jeep WJ with Quadra Drive

Hello All... I'm a rookie at this so bear with me....

I have a 1999 Jeep WJ with DANA 30 3:73 gears up front. My Vari-Lok differential went bad (grinding, sticking) so I decided I would swap it for a Detroit TrueTrac. Purchased TrueTrac from Summit Racing (part # 912A314), dismantled the front end and placed the TrueTrac (that was the easy part). When I tried to install the stock axle the driver side was short and the passenger side won't go all the way in. I had the impression that the TrueTrac is a direct swap for the Vari-Lok and the stock axle should plug in. It wasn't the case. After a while I got frustrated so I returned the TrueTrac and purchased a Vari-Lok stock replacement. My question to all you experts is, did I need to get after market axles to make the TrueTrac work with my QuadraDrive?

Question 2: On the Vari-Lok Differential, is the plenum a vital part for the Vari-Lok to function?. It seem to me that for $130.00 for a piece of metal shielding is a bit too expensive.

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Unread 08-27-2014, 07:19 PM   #2
bwiygul
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bump!! i'm in the same boat!!
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Unread 09-01-2014, 03:20 PM   #3
rjbruzan
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I would give Randys Ring and pinion or one of the others a call. Its a shame the True Trac was not able to work as its a great unit. I had one in my old XJ and loved it. Did you try putting the axles in after you removed the TrueTrac?

Ron
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Unread 10-16-2014, 09:43 PM   #4
Jwhughes3
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The truetrac is built to replace the open carrier not varilock. You needed the open carrier to mount it on plus open carrier axle shafts to work with it. About $130 new at Advance Auto.

JW
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Unread 10-20-2014, 08:35 AM   #5
Wheelin98TJ
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Quote:
Originally Posted by Jwhughes3 View Post
The truetrac is built to replace the open carrier not varilock. You needed the open carrier to mount it on plus open carrier axle shafts to work with it. About $130 new at Advance Auto.

JW
This is correct.

Its kind of unclear above, so just to clarify, the open carrier is not needed with the TrueTrac.

The TrueTrac is the carrier, it replaces the open carrier as you said.

Vari Lok diffs use unique length axle shafts. These unique length axle shafts are not compatible with aftermarket differentials/lockers unless specifically stated so. I'm not aware of any aftermarket diffs/lockers that are compatible with the Vari Lok specific axle shafts.
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