When i put my 2001 xj sport into 4 wheel drive and turn it wobbles and rattles . It feels like the tires are rubbing but there not i dont know whats wrong what do i need to replace?

 

Second post that's needed more info man.

What have you checked? Just the tires?

 

so when i put in in 4 and try to turn the vehicle around by stering, it shakes the **** out of the jeep and midway through turning it feels like it just stops . the whole front under side has rust my dad thinks its the ball joints and the my dad is also wanting me to ask is it ok to have lots of rust on an axle

 

Pictures. Let's see pictures

 

I HOPE you are doing 4 wheel drive on LOOSE sand, gravel or snow.

If you are doing this on clean blacktop or concrete, you are damaging your Jeep.

4 Wheel drive is for LOOSE driving conditions. Trails, Snow, Gravel and Sand only.

You are binding up your driveline as the front wheels need to turn FASTER during a turn than the rear wheels. When they are all locked together in 4 wheel mode there is no way they can alter the speeds and it makes the wheels "HOP" around. Very VERY VERY BAD on your XJ.

UNLESS you have a 242 Transfer Case. This has a 4 wheel drive "FULL TIME" mode that CAN be driven all the time in 4x4 mode as the transfer case allows the front or rear axles to spin at different speeds as needed.

IF you are doing this on the proper surfaces, you probably need the front outer U-Joints replaced in the front axles behind the knuckle. I had both my fronts replaced when I did the hub-bearings a few years ago.

 

Hmmm

 

It would depend on where you are testing it as the other guy said. You need to be in some loose stuff for it to operate smoothly in 4WD. 4 lo will be even worse. Also not sure what diffs you are running. Limited slip will cause chirping and a bucking type feel when turning. If you are locked then expect it to be even worse.
Take a look at your drive shafts and front axle shafts. If they are badly worn you will be loading and unloading them while moving forward and turning.

 

Please fill out your user CP so others can give you more help knowing what you have.

 

some have full time 4x4, I guess different years than this one, the full time can be driven just like 2wd, it switches back and forth from front to rear, no full lock, part time is full lock, confuses most people that didn't buy it new with owners manual, lol

 

tires are rubbing lower control arms would be my best guess

 

Guys - the original thread is 2 years old.