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bill
bill, jeep master tech
Category: Jeep
Satisfied Customers: 1627
Experience:  25 years with jeep drivability and electrical expert
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89 yj stuck in 4 wd

Customer Question

89 yj stuck in 4 wd
Submitted: 1 year ago.
Category: Jeep
Expert:  bill replied 1 year ago.

i need a bit more info please, what transfer case do you have?

what do you mean by "stuck" in 4wd does the lever move properly and just the light stays on or something else, how do you know it's still in 4wd do you feel the wheels bind?

also what have you already done to diagnose the problem if anything

Customer: replied 1 year ago.
1989 Stock base model...Light remains on...lever moves freely but still in 4wd...jeep is 35mile from my current location
Expert:  bill replied 1 year ago.

ok moves freely as in you feel the detents?

I am trying to get a handle on what is happening.

you should have a 231 transfer case which is 2wd,4wd high, neutral and 4wd low.

there may also be a front axle disconnect with a shift motor on the right side, all controlled by vacuum, so if you feel the detents in the shifter the transfer case is coming out of 4wd and either the axle disconnect shift motor(vacuum operated from a switch on top of the transfer case) and thus not allowing the light which is also on the front axle disconnect housing, to be shut off, IF it is indeed somehow stuck in 4wd even though you feel the detents then it is an internal failure inside the transfer case which could be a broken shift fork, what needs to be done FIRST is see if the truck is TRUELY in 4wd this is easiest with all 4 wheels off the ground if the shifter is in 2wd and all 4 wheels still turn then there is a failure in the transfer case if the rear wheels are all that's turning then the problem is in the vacuum switch on the transfer case OR the axle disconnect shift motor

Expert:  bill replied 1 year ago.

following up to see if you still need assistance or were able to solve your problem