Resident Audio Guru
Join Date: Sep 2004
Location: Worcester, Mass
Are you positive the front axle CAD is working properly? It is the culprit 99% of the time. The vacuum comes from the engine, 2 hoses go to the CAD, and one is a vent. There are only 4 possibilities for a fault: Lack of vacuum, the t-case switch and/or internals, the vacuum lines, or the front axle CAD.
Easiest way to make a definitive answer as to whether or not the transfer case is the issues, is to remove the switch from the T-case, connect the hoses and start the jeep. Actuate the switch by hand and see if the CAD actuates. If it does, then the T-case internals are to fault. If it does not, either you have no vacuum, the hoses are cracked, or the CAD is faulty.
White '94 YJ Sport
Green '94 XJ Sport - 57,000 Original miles
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