GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

How to test Truetrac

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Old 07-05-2012 | 02:52 PM
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Any thoughts on how to test it? Could I let it idle in 1st on jack stands and try to stop one wheel? Or I might find a place where I can put one tire in the dirt and the other on pavement and see if the dirt tire breaks loose.
Old 07-05-2012 | 02:58 PM
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i was serious. do a power break and check the tire marks to see if both are spinning. it's not rocket science.
Old 07-05-2012 | 03:16 PM
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Originally Posted by TXsilverado
i was serious. do a power break and check the tire marks to see if both are spinning. it's not rocket science.
I could burnout both tires with the stock diff.
Old 07-05-2012 | 03:35 PM
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Originally Posted by Ferocity02
I could burnout both tires with the stock diff.
Then the old unit was a Locker. Anything other then an open differential should leave 2 stripes. That's why open differentials are called Peg Legs. They only leave 1 stripe.
Old 07-05-2012 | 03:45 PM
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Originally Posted by 1FastBrick
Then the old unit was a Locker. Anything other then an open differential should leave 2 stripes. That's why open differentials are called Peg Legs. They only leave 1 stripe.
My open diff used to lock both wheels and do great burnouts, and then it failed.LOL The new locker is way more fun and keeps me from getting stuck in wet grass.LOL The true trac should be locked both wheels and usually causes the rear to fish tail.video it and post it.
Old 07-05-2012 | 03:47 PM
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Will the Truetrac lock at any speed?
Old 07-05-2012 | 03:59 PM
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Originally Posted by Ferocity02
Will the Truetrac lock at any speed?
Copied from there tech... http://www.eaton.com/ecm/groups/publ.../ct_128482.pdf

Typical TrueTrac differentials are shown above. As with a conventional differential, the TrueTrac side gears are interconnected by pinion gears, which allow one wheel to slow down or speed up as required. TrueTrac gears have spiral teeth, and the pinions are mounted in pockets in the case. If one wheel begins to lose traction, the pinions separate slightly from the side gear, and wedge in the pockets. As input torque increases, the separating force increases, thus slowing or stopping the spinout. This allows torque to be distributed to the wheel with the best footing.

Note: TrueTrac differentials require a certain amount of resistance at the ground in order to start
the power transfer. A TrueTrac differential may not transfer power if the spinning wheel is off the
ground. If spinning occurs, often a light application of the brakes, while carefully applying power,
will slow the spinning wheel enough to allow the TrueTrac differential to transfer torque to the
other wheel.
Old 07-05-2012 | 06:37 PM
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Originally Posted by Ferocity02
Mine is dead silent in turns. Is it supposed to make noise?
Mine locks up on tight turns when it's wet outside. When dry, it's bone silent.
Old 07-05-2012 | 08:10 PM
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So I tested it on the way home. Found some road where I could put the right tire in sand/dirt and the left tire on pavement. I then punched it from a stop and the left tire was chirping on the pavement as it struggled to get traction. The right tire spun enough to kick up dust, but the revs stayed low and neither tire seemed to actually break loose. I feel like this was a positive result.
Old 07-05-2012 | 08:29 PM
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Originally Posted by TXsilverado
just do a burnout. left foot on gas, right foot to floor and keep it going for about 2 minutes.
?? lol...

but with my truetrac you get on it and its just slide city....starts to pull the rear end around no matter what im trying to do lol



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