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Old 02-15-2011, 12:07 AM   #1
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Tru-Lok, Trac-Lok, what is physically different?

So I've been doing a lot of reading on the subject and I'm tired of digging. I just bought an 03 TJ Sport. I'm going to find out if i have Trac-Lok or an open diff tomorrow. Even though at 65K it might suck by now anyways. It's bone stock. Before I bought it, I made sure it had a Dana 44 rear. So my question is this: what components make that rear Trac-Lok or Tru-Lok? I like the fact that the Rubi Dana 44 is LSD or locked instead open or locked. If I wanted, someday, to get that set up, do I need to just take an entire rear axel off of a Rubicon or can I just change the guts in the diff? I'm sure no matter what I do, it'll be an expensive proposition. But i hope I didn't spend a lot of time making sure I got a jeep with Dana 44 just to swap out the entire axel. My intent is to have the benefits of LSD on the road when it's icy or snowy out (I can't imagine driving around locked all day just because of a little snow), and still have the capability of a locker for tougher stuff off-road. If there are any benefits to an open diff that i don't know about, please share. Sorry for the long question, but a little knowledge would be greatly appreciated. Thanks,

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Old 02-15-2011, 08:18 AM   #2
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You can add a locker to that rear. Lots to choose from.

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Old 02-15-2011, 09:00 AM   #3
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The nice thing about what you have with your Dana 44 rear end is lots of options for lockers. If you are looking for a locker like the Rubicons have I would stay away from putting the Rubi rear locker in and go for an Auburn ECTED or something similar. It's a LSD like the Rubicon when unlocked and at the push of a button it's locked up without all of the nanny controls (any transfer case position). Plus it's all electronic, no need to run an air supply line and all the other stuff that's involved with putting in an air locker like the Rubicons had.
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Old 02-15-2011, 09:11 AM   #4
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I am not sure what the weather conditions are like where you live, but if it doesnt snow much or ice over, a detroit locker is also a good option. It is cheaper than most selectable lockers, it has great road manners for an automatic locker, and it does its job offroad.
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Old 02-15-2011, 10:02 AM   #5
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Quote:
Originally Posted by mum954 View Post
So my question is this: what components make that rear Trac-Lok or Tru-Lok? I like the fact that the Rubi Dana 44 is LSD or locked instead open or locked. If I wanted, someday, to get that set up, do I need to just take an entire rear axel off of a Rubicon or can I just change the guts in the diff?
The Trac-Lok is a clutch-based limited slip differential.

It was an option in some models. The clutches require friction additive to work properly, and they usually only last 50-70k miles, depending on driving style.

The Tru-Lok is an air locker/LSD built for Jeep by Tochigi Fuji Sangyo. It runs on a very low air pressure - 3-5psi range. The LSD is gear based, so it does NOT require friction additive. You can not install a Tru-Lok into a non-tru-lok housing. from the factory the housing is machined to accept the larger size of the locker. The downside to the TJ Rubicon locker is it has been known to strip gears inside the LSD portion. (sun gear?)



more: http://www.jeepforum.com/forum/f9/wh...15/index2.html
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Old 02-15-2011, 11:09 AM   #6
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^^ GOOOD info...
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Old 02-16-2011, 05:35 AM   #7
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Thanks for all the great input everybody! Helps a lot!
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Old 02-16-2011, 05:43 AM   #8
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Quote:
Originally Posted by UnlimitedLJ04

The Trac-Lok is a clutch-based limited slip differential.

It was an option in some models. The clutches require friction additive to work properly, and they usually only last 50-70k miles, depending on driving style.

The Tru-Lok is an air locker/LSD built for Jeep by Tochigi Fuji Sangyo. It runs on a very low air pressure - 3-5psi range. The LSD is gear based, so it does NOT require friction additive. You can not install a Tru-Lok into a non-tru-lok housing. from the factory the housing is machined to accept the larger size of the locker. The downside to the TJ Rubicon locker is it has been known to strip gears inside the LSD portion. (sun gear?)

more: http://www.jeepforum.com/forum/f9/wh...15/index2.html
Great link, thanks!

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