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2500hd 8.1 transfer case leak NOT PUMP RUB!

vucelick
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vucelick Enthusiast

vucelick

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I was having some exhaust work done and noticed some tcase fluid weeping out of the transfer case where the shift control unit bolts to the side of the transfer case.  Is there a sensor port near there? Or something else? I installed the pump rub upgrade years ago.

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davester Senior Enthusiast

davester

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There's a seal on the shifting shaft that may be leaking.  There is a mode sensor in a separate spot that signals the truck when it's in 4wd, it's got a separate plug from the electric shift module (which it sounds like you have).

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