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Torque bind


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2 replies to this topic

#1 imprezaII

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Posted 22 July 2009 - 08:45 PM

What is torque bind and how can you tell if you have it with you car?:-\
Had lots of 4x4 bronco II's and rangers. Never heard of this term,
that I remember........

#2 Olnick

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Posted 22 July 2009 - 09:34 PM

It's basically an uneven, unsmooth transfer of power to the rear wheels. The problem is in a clutch mechanism in the tail housing behind the transmission, sometimes bad enough to wear grooves in the clutch plates.

Best test is to find a big paved area. From a stop, crank your wheels hard to one side, then put it in drive and let the car idle forward. Try the same thing to the other side. Then the same thing in reverse.

If you get jumpiness, shuddering, wheel hop--that's torque bind.

Sometimes an ATF flush-and-fill or a series of drain-and-fills will alleviate the problem. Some have taken that clutch apart and ground the grooves smooth.

Hopefully someone with more knowledge will chine in here.

#3 nipper

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Posted 22 July 2009 - 11:15 PM

It's basically an uneven, unsmooth transfer of power to the rear wheels. The problem is in a clutch mechanism in the tail housing behind the transmission, sometimes bad enough to wear grooves in the clutch plates.

Best test is to find a big paved area. From a stop, crank your wheels hard to one side, then put it in drive and let the car idle forward. Try the same thing to the other side. Then the same thing in reverse.

If you get jumpiness, shuddering, wheel hop--that's torque bind.

Sometimes an ATF flush-and-fill or a series of drain-and-fills will alleviate the problem. Some have taken that clutch apart and ground the grooves smooth.

Hopefully someone with more knowledge will chine in here.



You basically said it. It occurs in all 4wd vehicals, sometimes it is controlled because you are using a Manual 4wd on slippery surfaces so you never feel it. However have the vehicle in 4wd on pavement (if it is a simple 4wd system) you will notice it is very hard to turn the steering wheel, almost impossible to get it to full lock, and just as hard to get it out of 4wd.

On AWD vehicals it comes from driving on a flat or mismatched tires. The differnce in wheel speeds causes the AWD unit to overheat and destroy itself. This only happens really in true full time AWD systems. There are many differnt AWD systems out there, including some that are "on demand AWD" (meaning it waits for the wheel to slip to do anything).

On Subarus, fords, jags, volvos and others if you do a full lock turn in aparking lot, it should take very little throttle (if any) to make the turn. If you have TB you will have to give it moderate or heavy throttle to do this manuver.

nipper




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