Axle Shafts, Gerotor Pumps, Clutch Plates,... oh my! Is my front axle a vari-lok? - JeepForum.com
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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WJ Grand Cherokee Forum > Axle Shafts, Gerotor Pumps, Clutch Plates,... oh my! Is my front axle a vari-lok?

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Unread 07-06-2009, 04:22 PM   #1
99avant
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Axle Shafts, Gerotor Pumps, Clutch Plates,... oh my! Is my front axle a vari-lok?

Supposedly, my Jeep has the front Vari-Lok Axle. I have quadradrive, so this should make it so.

I have no proof of this... The jeep is at the mechanics right now having the axle seals replaced. They noted the shafts have grooves on them causing the seals to wear pre-maturely. The axle shafts were replaced a year ago (I did the work, parts from NAPA). This brought up the topic of replacing the shafts, and what ones to get (vari-lok or not). I said it needs the ones for Vari-Lok, but the mechanic says it is an open diff. We looked at it and neither of us see any clutches in there, and the wheels spin like an open diff.

So I have a few questions.

-How can a vari-lok diff be identified from looking at the inside? I can buy the fact that the system is worn out and that is why the wheels spin like the diff is open, but that would not account for the missing guts... What do the gerotor pumps look like?

-Would an axle shaft designed for a vari-lok axle fit into a non vari-lok axle (and vise-versa)? I read that the vari-lok shafts are longer. The axle shafts that I put in are for a vari-lok axle - I just checked the part numbers.

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Unread 07-06-2009, 04:29 PM   #2
ajmorell
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http://www.wjjeeps.com/varilok.jpg


IIRC the axle shafts are different lengths, and no they aren't interchangeable.
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Unread 07-06-2009, 04:44 PM   #3
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I see, the clutches would'nt be visible from the outside of the carrier? We had the carrier pulled and didn't see anything that indicated it was anything but open. Thanks Andy
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Unread 07-06-2009, 10:19 PM   #4
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Yeah, at least that is the way it looks from the picture. I have to be honest, I'm not all that familiar with WJs, let along the vari-lok axles but that is what I would assume as well.
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Unread 07-06-2009, 10:38 PM   #5
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What did the carrier look like? The pic below has an open carrier on the left and a track-lock carrier on the right. From looking at the wjjeeps link, the varilock carrier is similar to the track-lock carrier in shape (more squared off).

I thought the vari-lock units would have some type of markings on the case, whether it say vari-lock or hydra-lock. I guess you could also remove the spider gears and see if there's anything behind it...
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Unread 07-06-2009, 10:39 PM   #6
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Varilock axles are different length
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Unread 07-07-2009, 06:51 AM   #7
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I have to go to the shop this morning to drop off a few things, Ill snag a pic of the carrier.

It has to be a vari-lok, the shafts in there are for a vari-lok.
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|94 XJ|4.0|NP231|AW4|8.25 Trac Lock|Lotsa miles - SOLD
|99 WJ|4.7|242HD|Vari-lok|Upcountry+BB|DT8000|Dead as of 10/29/2009

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Unread 07-07-2009, 07:22 AM   #8
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Here are a few shots of my carrier from my original rebuild





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|94 XJ|4.0|NP231|AW4|8.25 Trac Lock|Lotsa miles - SOLD
|99 WJ|4.7|242HD|Vari-lok|Upcountry+BB|DT8000|Dead as of 10/29/2009

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Unread 07-07-2009, 09:18 AM   #9
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that is a varilok diff, you need varilok shafts.
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Unread 07-07-2009, 10:16 AM   #10
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You could get the numbers off the tag on the axle if it is still there and also your build sheet would say....
if it is a Quadra Drive II it would be Vari-loc front and rear.
Make sure you put the Friction Modifier in if it is a Vari Loc
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Unread 07-07-2009, 02:55 PM   #11
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Quote:
Originally Posted by tsconver View Post
that is a varilok diff
x2...From looking at the pics thats what it looks like. You can see how the spider gears are offset to the right and the pump/gerotor system is housed on the left. The vari-lock system has to be "primed" before it will activate, basically there must be some wheel slip to produce pressure on the clutch packs from the gerotor and pump, thats probably why it was acting like an open diff during your spin test.
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Unread 07-07-2009, 04:17 PM   #12
99avant
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Yep, it is a vari-lok.

Just got it back. Axle seals, Pinion seals, Axle shafts, and some brake pads.
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|94 XJ|4.0|NP231|AW4|8.25 Trac Lock|Lotsa miles - SOLD
|99 WJ|4.7|242HD|Vari-lok|Upcountry+BB|DT8000|Dead as of 10/29/2009

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Unread 08-11-2011, 12:25 PM   #13
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Does any body have a side by side picture of the Trac-lok, Vari-Lok and open carrier or even 3 separate pictures?
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Unread 08-11-2011, 01:15 PM   #14
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google images?
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Unread 08-11-2011, 01:26 PM   #15
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Quote:
Originally Posted by ratmonkey View Post
google images?
I know but I am at work and being lazy.......
I will do that when I get home..
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