Differential question?

[greendragon]

Questions about the anti slip differential. Right wheel rear slips and spins on ice and left is sitting on a concrete driveway. all forward movement of truck stops, while the wheel is spining. The dealer said that is the way it is. Is that the way the anti slip works?

Bob

 

[J&LRam]

the dealer is right. The Tracrite is worthless in that situation. I ran a search the other day on the Tracrite and found some interesting facts on the Tracrite. Look on page 199-200 of your owners manual and it tells us to set the parking brake lightly to activate the Tracrite from a dead stop. Mine work so so if I have some forward movement but in the circumstance you mention I'm just stuck. From a post I found someone got a answer from "STAR that says the transfere of power from wheel to wheel is torque sensitive and must have both wheels spinning [not stationary] to function. It is possible for the Tracrite diff to not send power to a wheel not spinning. Example: Accelerating from a stop with one wheel on ice and the other on dry pavement. If accelerating is fast , the wheel on the ice may spin and never send power to thewheel on dry pavement side. A slow start may necessary to start the vehicles momentum".

The only way the Tracrite will work is if both wheels are turning which means run the red light/stop sign or get stuck. Works great for layin' down two black marks but is a POS at a dead stop.

JIM

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[DZink24]

Is that the reason I can lay down 2 patches when I powerbrake, because of equal pressure on the tires? (I have off-road package)

 

[Jason Hughes]

All of the above is correct. The factory also calls it a helical diff. It is very much like the Detroit true-trac unit. Very good for road racing. It has worm gears in it to help bias traction and that is why it needs to be moving to work. I am waiting patiently for a clutch style unit to be available. An open carrier will also lay down two rubber patches if the ground and traction are equal. And that is why it helps to use the parking brake for traction. If the resistance is the same for both wheels, then they will both spin. Hope this helps.

 

[DPKetchum]

Any idea why after towing 9k at interstate speeds for several hours and stopping then starting off a bad shudder/chatter from these Tracrite diffs even at no throttle in 1st gear(six speed) I experenced this and found a old post or two complaining of same thing. On one post the repair was a fliud change to the 80w140 gear oil.