2001 S-10 Pickup making loud winding noise

AARONIS

MEMBER
2001 CHEVROLET TRUCK
120 MILES

Hi everyone. I am having an issue with my S-10 and hopefully someone can help me out.

I have a 2001 S-10 4X4 Ext. Cab with the 4.3 vortec motor with 120k miles and auto tranny. When I get the truck up to about 65-70 MPH, it starts making a very loud winding noise. The noise is coming somewhere from the front right side I believe. If I let up on the gas, the noise gets louder. If I get back on the gas, the noise gets softer.

Now, what I have found is that if while this is happening, if I pull over to the side of the road and put the truck in nuetral and roll about 5-10 mph and then engage the 4WD the truck makes a loud clunk noise and then the noise is gone. I then put back into 2WD and then it is good to go for a short time before it starts to happen again at about 65-70 MPH. So it seems like it is trying to or slipping to engage into 4WD automatically? Has anyone ever experienced or heard of this?

Also, my 4WD is a touch panel engaging system just in case that information is relevant.

If anyone has any suggestions or knows what is going on, I would greatly appreciate the help. Thank you much.

aaronis

3 Replies

HMAC300

MECHANIC
48,601 POSTS

Check to make sure t case and axle are engaging/disengaging fully first. It kind of sounds like it's not.

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Tuesday, May 29th, 2012 AT 4:46 PM

AARONIS

MEMBER
2 POSTS

After I put physically put it into 4WD after I pull off the road, I do put it into drive and it does got into full 4WD. I then do the same thing when disengaging it. So ya, that seems to be working ok.

Thanks.
Aaronis