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Unread 02-01-2013, 07:09 PM   #1
54bobby
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Join Date: Jan 2013
Location: wildwood, nj
Posts: 19
noob 4x4 question

so guys, how can i tll if my front drive is engaged? haven't had it off the pavement yet and don't wana do it on dry road. i have pulled the lever into all positions but can't tell if it's goin in. will the front shaft spin if in 2wd? if so, and the wheels aren't turning, what next? what is the cad and does my 87 2.5 have one? there is no light comming on the dash but bulb could be blown.

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Unread 02-02-2013, 08:27 AM   #2
mj40
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1989 MJ Comanche 
 
Join Date: Jul 2011
Location: north bay/corbeil, ontario
Posts: 282
it should have the vacuum unit on right side front axle.. my 86 parts mj has it..

start it up put it in 4x4. shut it off and jack up the right front tire.. in 4x4 it'll only rock back n forth.. if it spins around the vacuum unit is not engaging the axle lock.you'll have to check the vacuum lines for leaks and the unit..
your tranfer case is a chain driven either 231 or 242-part-time/full-time..
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Unread 02-02-2013, 12:23 PM   #3
dnuccio
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1995 ZJ 
 
Join Date: Jul 2012
Location: Phoenix, AZ
Posts: 3,484
put the whole thing up on jackstands, all tires off the ground. start it up and have someone sit in it and shift it into 4wd. if the front tires turn, then its working. you could just shift it yourself, but its a good idea to have someone sitting inside to cover the brakes, just in case it fals off the jackstands.
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Unread 02-04-2013, 07:04 PM   #4
54bobby
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Join Date: Jan 2013
Location: wildwood, nj
Posts: 19
vacume line from cad to tc was off. all fixed now.
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Unread 02-13-2013, 11:01 AM   #5
Hitman72
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1988 MJ Comanche 
 
Join Date: Dec 2012
Location: napa, ca
Posts: 78
what you can do on the fly is when on pavement engage it and make a hard right turn, if it is engaged the inside tire should hop.
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