Question about 1999 Jeep Cherokee

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Does anyone know anything about a viscous disk in a drive shaft to a 1999 Jeep grand cherokee?

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Viscous coupler is inside the transfer case. Failure is not "chronic" but they do fail. Easiest way to make one fail is to use different sized tires front and back (one size at front, different on back. tires do not need to be marked differently as tire actual height varies with manufacturer)...,a one inch difference in height results in a 3inch difference in tire rolling distance. Since all your wheels are connected to a single point, the transfer case, eventually if everything was not permitted to slip, something would snap. With different rolling distances, the coupler needs to slip all the time, which causes it to overheat and fail. Being a mechanical component, they do fail all by themselves sometimes though.

Posted on Sep 13, 2009

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