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Question on transfer case: Where does the vacuum come from in the transfer case? I have no vacuum coming from the transfer case can anyone tell me what may be the problem.:confused:
 

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it comes from the engine, you can follow the vac line from the front axle where the 4x4 shifting fork is and ID the vac source by following the vac line up to the engine. That vac line is clustered with the vac tube that goes to the tcase.

Do you not have 4x4 with ur jeep?
 

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I stole this off another users post, the tube leading straight up is the vac tube for the 4x4 leading to the tcase and front axle.

The tube taking a left turn in the picture is the heater unit vac line
 
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