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Old January 1st, 2012, 12:50 PM   #1
Bo's Cj 7
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Question Which Rear Differential 1997 Tj

Looking for input on what to buy for a rear diff
1997 Tj 4.0 auto trans 4" lift 33" tires 4.10 gears dana 35 rear
It gets about 1/2 its miles on road
I was thinking about a Lok Right or some type of lunch box locker but I have heard street manners arn't the best with clicking, snapping and even having it lock in half way around a corner and wanting to push the front end, but they are the cheapest
Next I have looked at the True Trac seems better on road but how will it work off road
Any ideas would be great
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Old January 1st, 2012, 02:31 PM   #2
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I wont go in to the whole the 35isaposdontrunit comment because I'm sure your already aware of it. A limited slip will cost more and leave you disappointed off road end of story. If I was going to lock a 35 I would run a lunch box for a couple of reasons. One its cheap, and two (the main reason) you can swap the locker to the d30 when you upgrade your rear.

A lot of the stories you've heard about street manners I'm sure are from people who set the locker up improperly. The locker has to be shimmed within spec, the original thrust washers might not be thick enough. I set my lockright up wrong the first time with too big of a gap between the locker halfs, and it would bang and pop all the time. Now that I have the gap shimmed within spec I can hardly tell its there.

I'm not going to say that it wont lock and unlock on you at times, but it is predictable. After you relearn how to drive you'll forget your locker is even there.
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Old January 1st, 2012, 02:40 PM   #3
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Originally Posted by wadey View Post
I wont go in to the whole the 35isaposdontrunit comment because I'm sure your already aware of it. A limited slip will cost more and leave you disappointed off road end of story. If I was going to lock a 35 I would run a lunch box for a couple of reasons. One its cheap, and two (the main reason) you can swap the locker to the d30 when you upgrade your rear.

A lot of the stories you've heard about street manners I'm sure are from people who set the locker up improperly. The locker has to be shimmed within spec, the original thrust washers might not be thick enough. I set my lockright up wrong the first time with too big of a gap between the locker halfs, and it would bang and pop all the time. Now that I have the gap shimmed within spec I can hardly tell its there.

I'm not going to say that it wont lock and unlock on you at times, but it is predictable. After you relearn how to drive you'll forget your locker is even there.
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Old January 1st, 2012, 02:50 PM   #4
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My friend has a a Spartan in his drag \street car. When driving on the street you can hardly tell its there. When he drags it locks up and he spins both tires. Like Wady said, a lunchbox locker is nicer thank a LSD, I've been high centererd and my only tire that had traction was the only one not spinning because without enough traction on both sides one will unload.
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Old January 1st, 2012, 06:43 PM   #5
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I wouln't put a lunch box in a 35,I busted two stock carriers,where the cross pin goes thru.
A lunch box leaves you with the stock,weak carrier.
I put a tru trac in my tj and love it.It always spins both tires,but you dont know it is there on the street.If you do have a tire in the air,you can apply brake pressure to put power to the other wheel,but I have never needed to.
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Old January 2nd, 2012, 09:21 AM   #6
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Thanks for the input.
Yes I have heard many storys about the strenght, but with an automatic trans and 170000 mile, I don't play in mud, mainly two tracks and snow playing if we ever get any so I hope the 35 will hold up. I have had many other vehicle with different diffs I have thought of welding this up it is a third vehicle in the family and doesn't need to be driven on road and with it welded you know exactly how it will react, just don't like driving into the gas station or beer store with one tire squeeling. So I thought I would get some input from others
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Old January 2nd, 2012, 10:09 AM   #7
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Some one on here had a brand new tru trac for sale about a week ago.iirc they wanted $300,half of what they are new.
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Old January 2nd, 2012, 10:39 AM   #8
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I will search that but Summit is $370 plus shipping
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Old January 4th, 2012, 11:00 PM   #9
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With an auto trans you'll probably notice a lunchbox locker even less
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Old January 4th, 2012, 11:05 PM   #10
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With an auto trans you'll probably notice a lunchbox locker even less
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