Question about 1990 Jeep Wrangler
Check you vacuum motor and vacuum lines going to the vacuum motor from the top of the transfer case. when u engage your 4WD the valves on the transfer case are opened by a switch on the transfer case. the lines coming from the switch cross the top of the transmission and up the passenger side of the engine compartment. these lines will be red, blue, green and yellow, and often covered by a black sheeth, about 1inch in diameter. check these lines to make sure they are connected. if they are not, the vacuum motor will not engage your front axle. your front driveshaft will still spin, because the transfer case is engaged as normal, but the right front axleshaft is a 2 piece system engaged by this vacuum motor. if they lines are messed up, the motor will not engage the axle collar connecting the 2-piece axle. if your vacuum motor is working, then you might have a broken collar, or perhaps a broken axle shaft. but it's probably just the vacuum hoses or the motor :) i hope that helps!
Posted on Nov 18, 2008
Check the front hubs could be frozen. if it hasen't been used in a while
Posted on Nov 16, 2008
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Posted on Jan 02, 2017
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