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limited slip?


gtmud
12-15-2004, 11:01 AM
I have I beleive is a '96' GC with the quadra-trac T-case. My question is , when looking at the Diff tag, what am I looking for to tell wether or not its a limited slip diff or an "open" differential.

JDPascal
12-15-2004, 11:12 AM
On mine, there is a tag on the left side of the diff housing cover (held on by one of the cover bolts) that says to use a limited slip additive.

Some times the axle tag with the ratio will indicate wether it is L/S or not. I don't have a pic of the tag right now or I would post it.

If you take the cover off, you can see the L/S clutch disc's in the cage. On mine, you have to look close cause they are recessed in behind the axle gears.

JD

a_alyte
12-15-2004, 12:46 PM
I too have been pondering the same question since the tag on my rear diff is extremely difficult to read!

I read an article recently which described a test you could quickly perform to determine if you have L/S or an Open Diff.

It said to jack up the rear of the jeep & put it on jack stands. Next, it said to take one wheel & spin it in one direction, if the wheel on the other end of the axle spins in the same direction, you have Limited Slip! If the other wheel spins in the opposite direction, you have an Open Diff!

I have Selec-Trac & was afraid I was driving w/out the additive in my rear axle. I put some in anyways & after reading the article I found out that I didn't need it (open diff).

Hope this helps.

gtmud
12-16-2004, 08:08 AM
On this GC, when I was working on the front axle (hubs) I would try to turnthe tire, no go. This is the full-time 4x4. I figured it was because of the full time 4x4 that I could not turn the tires. Actually it would turn a little, but with a lot of resistance. When I was working on the front axle, the rear was on the ground. I didn't notice anything differant about the diff. looked just like the open i have on my XJ.

JDPascal
12-16-2004, 09:03 AM
I don't believe any jeeps come from the factory with front l/s diffs.

The rear will have the additive reminder tag - if some one didn't lose it and leave it off.

You could take the vin # to the dealership and they will print you off the line sheet and a record of the recalls that pertain to that vehicle - whats done and what needs to be done.

JD

msrjeep
12-16-2004, 09:50 PM
on the WJ quadra drive is lsd f/r. it can send 100% power to any 1 wheel.

JDPascal
12-16-2004, 11:24 PM
Thanks msrjeep. I've not looked into the newer jgc drive train at all - yet.

JD

Audiobahn77
12-16-2004, 11:45 PM
It said to jack up the rear of the jeep & put it on jack stands. Next, it said to take one wheel & spin it in one direction, if the wheel on the other end of the axle spins in the same direction, you have Limited Slip! If the other wheel spins in the opposite direction, you have an Open Diff!

Is this true? I didn't add any additive and I want to make sure I didn't need to. I have the SelecTrac as well.

scoutsout
12-17-2004, 01:13 AM
what year did jeep start using the viscous coupler ive heard its in the nv249 transfer case. but ive also heard of some vehicles have a vc on the front drive line? do they work the same way and do the same thing? is one better than the other? Also ive read that newer JGC have an electric l/s diffs front and rear with the vc. That sounds awesome. what year did that start? and are they very reliable? I'm thinking of buying a newer JGC and like to be a well informed buyer. Any help would be appreciated.

MattFelner
12-17-2004, 02:50 PM
Actually, Jeep stopped using the VC's in the WJ's, and the WJ's/WK's use a different type of coupler, one that isn't so sensitive to let's say a 1% difference in tires.

The reason so many of the units on the ZJ's went bad, is because if your tires were even the slighest bit uneven, it would change the axle RPM to keep the same speed with the other tires. Because of this, the VC was constantly compensating.

HTH!
Matt

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