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Old 04-06-2011, 08:53 AM   #1
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Question on Trutrac in my D-30

Fairly new to the locker scene so have a some what goofy question. Based off of what I've read the D-30 is an open differential untill put into 4WD. Once in 4WD you only have one side of the axle pulling right? I am wanting to put in a Trutrac and was wondering since it splits the torque equally to both tires wont it handle like its in 4WD when its only in 2WD?( if both tires are on the ground) If this is true then will I just gain more torque or will it be better to just keep it the way it is? Not really sure on what to expect from a lsd in the front.

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Old 04-06-2011, 09:13 AM   #2
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True trac works well in the front axle. In 2wd you will not notice it there. In 4wd, unless one tire gets off the ground it works very close to a locker, but if a tire comes off the ground it will transfer most of the power to the tire in the air, Unlike a real locker which is split even no matter if a tire is in the air or not.

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Old 04-07-2011, 12:58 AM   #3
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Thanks for the info. Just didnt want to make that investment and have it handling like a tank on the road.
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Old 04-07-2011, 01:22 AM   #4
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Most of the guys running TruTracs front and rear love the road handling they have...even in snow.

Edit: And looking at your signature...if you can handle the Detroit locker in the rear, you will have NO problems with the TruTrac in the front.
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Old 04-07-2011, 10:18 AM   #5
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In my experience, in 2wd - the TrueTrac is transparent in the front of my Jeep .
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Old 04-07-2011, 10:28 AM   #6
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You won't even notice the Truetrac's presence 03Ruth. I ran with front and rear Truetracs 10-12 years ago and was kind of disappointed I couldn't even tell they were there after I left the shop that installed them. They do work well offroad until the point the trail gets uneven enough to start lifting tires off the ground.

Regarding the often repeated rumor of only one side of the axle pulling in 4x4 (or 2wd), that is absolutely untrue. It's simply an old wive's tale repeated by those who don't understand how an axle (differential) works. The differential always... always (!!) splits the torque 50:50 to both sides. In all conditions.

I know that may not sound right but here's a writeup I did years ago that will help explain it... 4x4 & Torque answers -

And if that way-too long writeup didn't leave you snoring at your keyboard, here's one more that will explain a little more about lockers and limited slips... What? Why do I need a locker? I thought I had 4WD! -
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Old 04-07-2011, 06:17 PM   #7
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Quote:
Originally Posted by Jerry Bransford View Post
You won't even notice the Truetrac's presence 03Ruth. I ran with front and rear Truetracs 10-12 years ago and was kind of disappointed I couldn't even tell they were there after I left the shop that installed them. They do work well offroad until the point the trail gets uneven enough to start lifting tires off the ground.

Regarding the often repeated rumor of only one side of the axle pulling in 4x4 (or 2wd), that is absolutely untrue. It's simply an old wive's tale repeated by those who don't understand how an axle (differential) works. The differential always... always (!!) splits the torque 50:50 to both sides. In all conditions.

I know that may not sound right but here's a writeup I did years ago that will help explain it... 4x4 & Torque answers -

And if that way-too long writeup didn't leave you snoring at your keyboard, here's one more that will explain a little more about lockers and limited slips... What? Why do I need a locker? I thought I had 4WD! -

Jerry,
Thanks for the info. Your write up great and I now have an understanding of how it all works. Looks like it time for a trutrac in the front. Now I just have to convince the wife! Wish me luck!
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Old 04-07-2011, 08:21 PM   #8
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I've go a TrueTrac in my front D30 and I cant even tell its there.
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Old 04-11-2011, 12:25 PM   #9
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I have tru-tracs front and rear on my 97 TJ. Can't even tell they are there.
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Old 04-15-2011, 06:56 AM   #10
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I have a tru-trac in my dana 30 97 TJ and it works great! If you get into a place where 1 front tire is off the ground, you can apply slight brake pressure to stop the one in the air spinning to transfer the tork to opposite wheel.
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Old 04-15-2011, 09:05 AM   #11
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I've got TT's front and rear. Love em. It's a beast in the snow and gets me through Colorado just fine.


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Old 04-16-2011, 04:36 PM   #12
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If you guys could only put the TruTrac into one diff, would you do the front or rear?

I know the rear is the more common choice, but I'm wondering what you would do.
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Old 04-16-2011, 04:38 PM   #13
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That's a bit more complex question than meets the eye. It really depends on a few things... like if you also want a locker, what your rear axle is (Dana 35c or 44), if you need 4x4 during the winter, etc.
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Old 04-16-2011, 04:52 PM   #14
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First, decide if you are going to re-gear, second, think about ur on vs off road driving ratio, 3rd think about conditions u will be driving in.

I threw mine in the front because im eventually going to re-gear, for my dana44 I will have to change the carrier to go any taller on gears so im probably just going to change the rear to an ox locker when I do it.
Also, I drive mine daily and though lockers are great off road they can cause problems on road in slippery conditions so I know im gonna need a selectable in the back. When in 2wd my lockright doesnt interfere. As a bonus it makes a cool clicking sound when turning.
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Old 04-17-2011, 08:52 AM   #15
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Quote:
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in my experience, in 2wd - the truetrac is transparent in the front of my jeep .
hey island, what are you doig with a picture of my girl friend???

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