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Old 10-22-2010, 08:43 PM   #1
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4wd

Just bought 1st jeep. will go into low but will not go into any 4wd? What's missing?

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Old 10-22-2010, 08:49 PM   #2
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Okay, auto or stick? What do you mean it will go into low but not 4wd? Do you mean the t-case will be in the 4wd position but 4wd does not work? Or you put in in 1st gear and the t-case can not move into 4wd? either way could be the linkage or the vacuume disconnect on the front axle.

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Old 10-22-2010, 08:53 PM   #3
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The t-case is in fwd position but 4wd doesn't work. Stick 2.5. Are there any wires going to the vacuum disconnect That would either engage or give me an indication on the dash?
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Old 10-22-2010, 08:57 PM   #4
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Its located on the passenger side of the front axle, there are wires and hoses for the vacuum to make a shift fork move and "lock in" the front shaft. I would check the connections 1st. Then worst case you can lock the fork over with either washers or a spring. There is also an adjustment screw on the t-case linkage.. so maybe start there. it might just need a slight adjustment to slip into 4wd.
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Old 10-22-2010, 09:09 PM   #5
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Yea, you're probably right. The guy I bought it from has jury-rigged about everything else on this thing. Wouldn't surprise me if he either didn't hook the vacuum back up or just left the wires off completely. Thanks for the help. I normally build airplanes so if there is anything you need to know about welding, machining, or fabrication, feel free to ask. Thanks and I'll look at it in the morning. Take care and have a good night.
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Old 10-23-2010, 08:48 PM   #6
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you need to do a frt diff vacuum by pass .
it is free and will take ya 30 minutes.

i have run it for a very long time .
it will not effect mpg,ride,handling or add extra wear.

http://www.wranglerforum.com/f8/4x4-...tml#post374350

i promise it is the best thing you can do for your jeep.

the vacuum on the frt diff is the weakest part of your 4 wheel drive system

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