osan1030

Hey everyone I need some help. I bought a 90 xj a couple months ago and it needed some love. I fixed it up a bit but during the first snow fall I put the 4x4 on and it felt like something was holding it back. Turns out the front right tire was locked up. So I brought it back home and now even the rear right tire is locking up. I tried to take it out of 4x4 but it wont come out. Im fairly new to working on 4x4 so I don't know what is going on. If anyone has any idea that would be great.

Fred/N0AZZ

Check brakes and brake lines.

97grand4.0

Check rusted solid parking brake cable to back brakes. Check all brake hardware for missing broke stuff.

Kscha41

I would think it would be something to do with the 4wd because it didn't happen till he put it into 4wd. Maybe the previous owner swapped axles and there is two different gear ratios.

jedijeb

Do you have only 4Hi or 4Hi part time and 4Hi full time on the shifter?

Were you driving in the snow before you put it in 4x4 or were you on dry pavement?

If there are different gears front and rear, you could put it up on jack stands so all four wheels are off the ground and the stress should come off and allow you to take it out of 4x4 if nothing in the transfer case is broken.

nujeepguy

you would not make it around the block

osan1030

Yeah i dont think its the brakes

osan1030

And whats the way to fix that? Get gears for the front too?

osan1030

I was driving in the snow. And okay thanks ill give that a try just so im able to atleast move.

97grand4.0

bump

97grand4.0

U joints on the front shafts? Jack it up try rotating wheels watch u joints, have a close look with a flashlight

jedijeb

If you have two different gear ratios, you have to either regear the front or the rear to match the other one.

Engaging 4x4 with different ratios causes the front and rear axles to rotate their wheels at different speeds. On dry pavement you won't go a few feet before the stress locks things up. On snow the wheels can slip and you will get a little further but the numerically higher ratio axle is turning slower and holding the other back, think pulling a kid in a wagon while they drag their feet. Eventually you will gain enough traction with all four wheels that it will cause the transfer case gears to bind up and you will stop.

If you can get all four wheels off the ground and they will spin when idlng in 4x4, then mismatched gears could be the problem. If they still don't spin then you have other problems.

If the front only had bad wheel bearings or brakes then it should have given problems even when in two wheel drive. If the parking brake cable was frozen, it is attached to the rear wheels and engaging 4x4 should not have caused everything to lock up, it would have been dragging just before you engaged. Bad U-joints in the front could cause problems, but unless you have a CAD axle, they should have been causing the same problem in two wheel drive.

You just have to imagine how each part works and how it is connected to the rest of the parts, then think how they interact if one breaks. This problem seems to be caused when the transfer case is engaged, so it is either internal to the transfer case or something due to the transfer case locking the front and rear axles together. Then work out from the transfer case to the wheels thinking how each part might affect the whole system.

nujeepguy

did it EVER drive normally? if it did ,this business of different gear ratios is over. you could not drive anywhere with 2 different axel gears. not on your driveway!

Martlor13

Not true man, if you aren't in 4wd.

nujeepguy

go to 4wd and drive straight on grass or gravel. normal you can go. if 2 different gears you aint going.
that how to check it.

i just did it 5 minutes ago on my gravel drive and a SHORT way on the street!
in 2wd you could go,its like having no gears up front