The Mud Pit > Wrenching
yj 4wd issues
tx_country:
So a buddy of mine bought that 91 yj we found some issues... We got the 4wd to engage, but now he can only drive about 5 feet before the front axle locks up... The diff is good... T case maybe? Any. Ideas thoughts or suggestions?
kirksjeep:
Sounds like the axle disconnect is working :-\. Can you shift back out of 4wd and put it into 2wd? When I talked to the P.O. he said it took him a few days to get it back out of 4wd.
If the front axle is locking up it, I am thinking it must be in the gears. When in 4wd the passenger side shafts become engaged and the differential acts like a open diff just like the rear. The fact that it rolls about 5 feet with 33" tires would equal 3/4 of a rotation ( 33"x 3.14= 103.62 103.62"/ 12"= 8.64 ' I'm stuck on the couch, and I'm a Nuke). If it was the transfer case, the largest gear for the 4wd activation is only about 5", so 1 rotation is 15.7" so the math alone points to the differential.
Pull the front drive shaft and then shift into 4wd. The axle disconnect will slide and engage. Try to drive and see if it still locks up. If it does it is in the gears, if not I would then suspect the transfer case.
Have you tried shifting in the 4wd low and trying it? Do not give it much gas, since the lower gearing could cause something to break if it is binding in 4wd Hi.
The more info you can tell us the better we can keyboard analyze.
tx_country:
It shifts out of 4wd just fine... Will try your suggestion... Might take a few days tho. We unfortunately went 3 sect duty and a gang went shift work and chris ( the thickness) went on nights. Will post more as I find out more
kirksjeep:
Shift work sucks!!!!!!!! But it will end. Just let us know what you find.
The_Thickness:
it does the same thing in 4 low. it engages fine no problems with it. shifting out is easy other then the only way to get the front end to unlock is drive in reverse for about 10 ft. when its is in 4 wheel drive about the time it locks up if i remember correctly the drive side tire still wants to rotate or it atleast feels like it.
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