Strange noise at highway speed.

[grooveman]

1057333

I have a 92 YJ 2.5L. The last few days Ive noticed a high pitched "whining" noise at highway speeds that fades in and out. I cant tell where its coming from yet. Anybody else had this problem or know what it may be? Its not the tires or the road.
Thanks[addsig]

 

[Tug-n-pull]

1057347

Welcome! Check you belts to see if they are tight, Lub everything that moves often, Get some one else to drive and you lay on the hood and listen, Just kidding about that one sorry, Is there any thing catching the wind and maken it whistle. I don't know but good luck tug[addsig]

 

[Bounty__Hunter]

1057364

Check the air intake on the engine, make sure everything is tight (CCV, etc.). Also check for vacuum leaks around the intake manifold. Is it running okay?[addsig]

 

[grooveman]

1057367

It is running fine, all pressures and temps are normal.[addsig]

 

[flyboy]

1057485

It may also be one of the wheel bearings. The easiest way to check these is while driving swerve back and forth enough to get some body roll and listen to see if it is louder turning one way than the other. Listen to which side it comes from.[addsig]

 

[JP]

1057487

check the tensioner bearing make sure its lubed, you can disassemble this pretty easily. it may also be coming from an alternator or water pump bearing. I've heard a similar sound, kinda like a whistle, but only at higher RPM's, I sprayed the alternator & tensioner and dont really hear it anymore... usually only on really humid cold mornings.
Good luck... -JP[addsig]

 

[grooveman]

1057511

Yeah in fact Ive only noticed it on the way to work in the morning when its colder and it has been humid the last few days. Ill check that, Thanks.[addsig]

 

[ToolmanII]

1057630

I hope you luck is better than Mine... Same noise but got worse.. Transmission toke a crap....

Started only in low gear but went away after a while.. Now it does it all the time...

Good Luck
[addsig]

 

[exjay33]

1058825

I have an 03 getting the same noise but mine is the dana 44 rear soon to go to the dealer. The sound does it go away under power then when you back off the gas a little bit you can hear it that what mine does I think pinion bearing.[addsig]

 

[jeepster]

1059004

id checkthe alternator. see if the noise changes with speed and accessories on and off. most times whing is electrical, growling or rumbling is most times h2o pump ,bearing or pulleys. hpoe you get it figured out before it gets worse. [addsig]