Only in 4WD Noise

[Vette66]

I have put my 02 Yukon XL into 4WD before when I went to the mountains but did not notice any noise a couple weeks ago. Well yesterday I went to the beach and drove around the beach for a couple miles. As soon as I put it into 4wd high I heard a worble sounds, sort of like a warped rotor for brakes, it did not seem to slow me down any and got more consistent as speed increased. As soon and I put it back into 2wd the noise went away.

So does anybody know what this is? Low fluids? Kinda at a loss here.

Any help is appreciated.

Chris

 

[03Yuk0n]

Hey, not here to jack the thread, but I got the same problem in my 2003 yuk0n. Pretty much the same symptoms as Vette66.

thnx all
k0n out

 

[Vette66]

Maybe if 2 of us have it now, many have had it in the past. Hopefully a easy cheap fix, haha. Always welcome in my threads..lol

BTW I did search for answers and I got nothing on noises from the 4WD when in engaged so yes I have search a bit.

 

[03Yuk0n]

Hey Vette yea thnx, same here did some research but still ended up with nada. Lol yea hopefully someone will chime in later on.

 

[MABX13]

well my truck is only 2wd and the only closes i get to 4wd is the traction assist button

 

[Donnie Yukonie]

where is the noise coming from? more center or forward of the vehicle ? The most probable cause is the transfer case bearings going bad. The NP246 Tcase has issues from the factory known for the pump to wear through the magnesium casing , check to make sure yours is dry and filled with fluid , if so check the color (should be blue) Auto tracII report back with your findings

 

[Vette66]

Forward of the cab. I will check it out in the next couple days and report back.

 

[GeneralNoobzor]

DItto! Bump

 

[Rd05lly]

This is a picture of inside of 246 transfer case. With pump rub

Check the front diff lube and u joints.