TrueTrac LSD up front...bad for the front driveshaft / t-case?

[Lindenwood]

I understand an LSD up front will cause the non-ADD axle to still spin the driveshaft even in 2WD. I have heard folks mention this anecdotally, but havent confirmed that this won't cause any undue wear of these driveline components.

Yes, I am considering manual hubs as a way to minimize this effect for daily driving, but not set on it just yet.

 

[rocket2267]

Bump... no comments?

 

[maclean216]

I had one for a few years in the front of my 2001. There will not be any negative wear on the drive from the Tru Trac. It's great in sand and snow. Just don't go rock crawling.

 

[rocket2267]

I had one for a few years in the front of my 2001. There will not be any negative wear on the drive from the Tru Trac. It's great in sand and snow. Just don't go rock crawling.

Can you expand a bit on your admonition to not go rock crawling? Did the TrueTrac just not work when crawling rocks?

Thx.

 

[maclean216]

In my experience, I broke more axles with the Tru Trac. And because it becomes an open diff with one tire off the ground, which happens frequently when rock crawling. Just my experience.

 

[rocket2267]

In my experience, I broke more axles with the Tru Trac. And because it becomes an open diff with one tire off the ground, which happens frequently when rock crawling. Just my experience.

That is certainly good to know. Thank you.

I understand that a TrueTrac will behave like an open diff if one wheel leaves the ground... but I thought the whole idea with TRAC was that the computer would sense the wheel spin, apply a brake to just the spinning wheel... and then the TrueTrac would be able to apply power to the opposite wheel.

Sounds like this was not occurring for you?

 

[maclean216]

No. And I disabled Trac/VSC/ABS. Trac really didn't perform well off-road in my opinion and off road performance increased after I disabled it. Keep in mind I had a Detroit Locker in the rear. My advise to you would to temporarily disabled it and see for yourself.

 

[IBallEngineer]

In my experience, I broke more axles with the Tru Trac. And because it becomes an open diff with one tire off the ground, which happens frequently when rock crawling. Just my experience.

I get what you are saying here but your misstating it a little. An open diff sends power(or drives) to the wheel with the least amount of traction. So with one wheel off the ground an open diff simply spins that wheel and there is no traction.

If you are breaking axles(with a tru trac), it is because when you have one wheel off the ground all drive power(actually the torque) is transferred to the one wheel on the ground. If that wheel is in a bind, the axle or something else will break.

This would be true of a Detroit locker or a spool too. An air or electric locker act like a spool and would do the same thing, unless you turn it off as you should in a situation like that.

:cheer2:

 

[maclean216]

The break occurs when the axle in the air, which is the only one spinning, comes down and suddenly gains traction. Which occurs more frequently with a Tru Trac in my practical experience.

 

[calimobber]

The break occurs when the axle in the air, which is the only one spinning, comes down and suddenly gains traction. Which occurs more frequently with a Tru Trac in my practical experience.

Yea but thats no different than stock. Just don't want people to get the idea getting a tru trac will increase your chances of breaking a diff over stock. They will act the same. Try track is just supposed to help push some of the power back to the wheel still on the ground.

People just need to ex extra careful when its articulating like that. Go easy on the throttle so you don't slam down on a wide open spinning wheel


As for the factory abs limited slit. From my experience it mostly helps with breaking tires loose in the sand/ice/rain. If your car starts to break loose it straightens you out pretty quick. When crawling once a tire gets fully off the ground it fails to do enough to keep the vehicle moving. Mostly just makes the car jerk forward then back.

 

[calimobber]

As for the original question. No it won't cause an extra wear an tear on the drive train. when your driving normal its not doing anything. It never really full locks of the axle and only adds friction to help aid the solid tire. Its a good addition to a system.