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Unread 01-19-2002, 05:19 PM   #1
jeep thing
Registered User
Join Date: Aug 2001
Location: canada
Posts: 13
lost my 4wd

hey whats going on. This is the problem i was playing in the snow and went through a big bank half way through i lost the 4wd. I thought it might be the shifting fork so i took it apart it wasn't it. If it is my vacume motor is there any way i can pinch off a line if it is broke. They wan't almost $300 here for one. If anyone has a spare one they want to sell i would bye it. By the way it is a 92yj.

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Unread 01-19-2002, 06:56 PM   #2
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Join Date: Mar 2001
Location: Michigan
Posts: 471
Check all of your vacuum lines going to the front axle. It sounds like you knocked one off. Do you still have the indicator light saying it's in 4 wheel drive or did that go out too? If it's out, then I'd say that a vacuum leak is the problem.
89' YJ - 4.2 - NV4500 - NP231w/sye - 1" Body Lift - 2 1/2" Rancho Suspension Lift - 31" Firestone MTR - AR Outlaw II - Tomken Bumpers F & R - Warn 8000 front - Warn 6000 rec. mount rear - FlowFit Seats - Tom Woods Rear & Custom 2" front driveshafts
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Unread 01-20-2002, 09:05 AM   #3
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Join Date: Nov 2001
Location: KS
Posts: 318
You can get whats called a posi lock that runs off a cable and hooks to a lever inside you jeep. My friends yj had the same problem and we replaced it with the posi lock and no more problems. Its nice not having to worry about the cold weather or vacume lines effecting the 4wd system any more.
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Unread 01-20-2002, 12:55 PM   #4
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1992 YJ Wrangler 
Join Date: Aug 2001
Location: Pt. Charlotte, FL
Posts: 168
I have a '92YJ also and couldn't find a manual anywhere with the type of diagram that looked like the one I had. Evidently in '92 they changed the vacuum switch to only two ports on top instead of three. Only one has vacuum at a time, to either engage or disengage. Put the entire jeep up on jack stands or lift and switch into 4WD and see if the vacuum is present in each. If the vacuum is there respectively you may have to buy a new vac switch but don't go to the dealer you can get the exact same one (Dana Spicer) from 4WD Hardware for about $100 bucks cheaper.
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