does my jeep have limited slip diffs?

35

Asked by Oct 05, 2009 at 09:14 PM about the Jeep Grand Cherokee

Question type: General

17 Answers

265

What kind of Jeep? Most do not have a limited slip.

8 out of 8 people think this is helpful.
505

if it says quadradrive on your shifter or the back of your jeep then yes you have Vari-lock Limited slip differentials front and rear. But if it says quadratrack you don't.. But some quadratrack models with tow packages came with a limited slip in the rear... Go to this link and Request your build sheet from Jeep and it will tell you in it... http://www.jeep.com/wccsapp/universal/J/index.jsp? appStr=wccs&titleStr=Contact+Jeep&familyStr=brand&franchise=J&actionURL=%2Fwccs%2Fbrand_forms%2Fus%2Fwebform.jsp&promo tion=null&category=U

17 out of 17 people think this is helpful.
505

i dunno why it broke up the ink.. probably the question mark.. but put ALL that into the address bar and it will take you directly to the build sheet request page

2 out of 2 people think this is helpful.
385

Just jack it up while in park, no parking brake and spin one of the wheels, if it fights you the more you spin it, its a hydra-lok, if the opposing wheel wheel spins the other direction, its open. Im an ASE certified tech, and Ive got 213k on my 4.7 limited and done all the repairs, glad to answer any questions you have. If you do have limited slip diffs, you have to use synthetic 75w-140 and Mopar brand only! limited slip additive. The stuff at auto zone says right on the bottle not for Quadra Drive Jeeps...

21 out of 21 people think this is helpful.
505

you mean Vari-lock differentials (we're not talking bout seizing cylinders ;) lol ) .. and most places will call the additive for the diff fluid a "slip Friction modifier" so if it says that it works too.

3 out of 3 people think this is helpful.
385

Its actually called hydra-lok in his year jeep. This is different than vari-lok which is a true clutch pack design, where as the hydra lok actually uses hydaulic pressure generate by a pump on the driver side of the differential to apply the clutches harder as more slip occurs. You cannot use any old friction modifier with the hydra lok, it has to be synthetic, because the clutch packs are synthetic, unlike almost every other limited slip diff that has organic clutches. Do some research before you act like you know what your talking about... I work on this shit every day smart ass

12 out of 12 people think this is helpful.
265

That language isn't necessary, and you're the one who is wrong. He's asking about his Grand Cherokee (a 1993) not his Cherokee (a 1999). Hydra Lok was used on 1999 Grand Cherokees. He's asking about the 1993, hence the posting on the Grand Cherokee page.

5 out of 5 people think this is helpful.
385

Ya sorry about that I was just trying to give a little expertise on the subject and got carried away with it. Just dont use Trans X friction modifier with a quadra drive

2 out of 2 people think this is helpful.
505

okay john, lets compare each others WJ's and see who has worked on them most.. You were right about them not being vari-lock tho.. and no andrew hydra lock was not used on 99-04 Grand cherokee's ( but i think you ment 99 cherokee).. no hard feelings.. i actually never looked at his page to see what year his was. I just assumed WJ.. my bad

2 out of 2 people think this is helpful.
265

It was used on the 1999, unless you think the manufacturer is wrong. http://www.dana.com/centennial/histbook/1990-1999.pdf

3 out of 3 people think this is helpful.
505

Interesting.. I'm not saying you're wrong, I've just never heard them called that before.. the options from jeep in 1999 for the rear axles were track-lock and vari-lock wjjeeps states that Vari-Lok equipped axles use a progressive, hydro-mechanical speed-sensing torque transfer coupling maybe they changed the name? here is the link for Diffs in the WJ's.. http://www.wjjeeps.com/tcases.htm --------- Okay I Did some research.. We're both right... The lockers are called Vari-loc by Jeep, Hydra-loc by the units original manufacturer naxja http://www.naxja.org/forum/showthread.php?t=14443 jeepsunlimited http://www.jeepsunlimited.com/forums/showthread.php?p=4473668

1 out of 1 people think this is helpful.
505

post #37- http://www.jeepforum.com/forum/f13/moaning-low-speed-turns-674439/index3.html#post6578770 last post- http://www.jeepforum.com/forum/f13/hydra-loc-axle-shafts-746865/ last post- http://www.jeepforum.com/forum/f13/how-can-i-tell-if-44a-has-trac-lock-524572/

2 out of 2 people think this is helpful.
385

lol good research, I didnt know Jeep called it a different name, but if you ever change the fluid on one, its a unique differential. You can hear the fluid pump work if you spin the wheels while the cover is off and see it work.

1 out of 1 people think this is helpful.
505

yeah they are intersting.. here's a pic of the insides... kinda a cutaway http://www.wjjeeps.com/varilok.jpg If anyone wants a used one i'm bout to pull my rear one out to install the aussie locker thats been sitting in my bedroom for 6 months.. only problem is i need an open carrier and new axle shafts (the vari-lock ones are apparently shorter and wont engage the aussie in the open diff)

10 out of 10 people think this is helpful.
60

Sup anyone answer a couple things for my 1995 jeep grand cherockee laredo 4wd? I need to know if its dana 35 or 40 or 44 or? I cant find it anywhere and im sure its stock everything. I need to replace my full rear axle and drive shaft. Cause i heard its not good to drive with just front drive shaft.

6 out of 6 people think this is helpful.

Its most likely. A Dana 30

In the frount And Dana 35 in rear Or Chrysler 8.25

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