whining from rear of truck

[hickory]

have whining noise from rear of truck. went to dealer and found propeller shaft center bearing bad. replacement bearing on national back order wondering if any one else has this problem 2003 drw 3500

 

[dthorkelson]

Rear End Whine

I had the problem with my 03 and it turned out to be the rear end . The dealer replaced the ring gear and pinion and it quit whining. It is starting to do it again but mot nearly as bad. It does it only when under power, let off the trottle and it stops. Good Luck Don T

 

[Prairie Dog]

Whining from rear of truck eh, Your not making your wife ride back there are you?

 

[Deezul1]

Ya beat me to it I was going to say mine was the mother in law makin all that noise.

 

[bighammer]

Was it a pretty high pitch? I heard a sort of howling noise (sort of like a real big turbo) yesterday, but it sounded like it was in the back of the truck. It went away after a couple miles.

 

[Steve G]

Originally posted by bighammer

Was it a pretty high pitch? I heard a sort of howling noise (sort of like a real big turbo) yesterday, but it sounded like it was in the back of the truck. It went away after a couple miles.

Mine was doing this exact same thing. Took it to the dealer and found that the rear end was a quart low and front end was a pint low. It still does it a little after the truck has set for several hours and only for the first couple miles during acceleration.



Steve

 

[Steve M]

Are you sure you're not hearing the turbo? The second generation trucks have what's known as a "wine glass chirp" at around 1750rpm light throttle. It's the exhaust side of the turbo resonating through the exhaust. If the radio is off and it's cold outside, I hear the same sound in the new one except it's a lower pitched sound almost like a distant cider jug hoot with the bigger exhaust. It does it right around 1250rpm. It sounds a lot like gear whine.

If you let these little characteristics get to you, you'll become hyper sensitive to it and every sound it makes will keep you awake at night.

 

[Steve G]

Steve M. you may be right. I did some experimenting today and it appears it is associated with the throttle. When you let up slightly on throttle it quits. The noise quits after about 2 miles and will not do it again. It only does this when the truck has set for several hours. I have no idea what it is.

 

[rbattelle]

When I first read this, I thought pinion angle was off. But Steve M's solution seems pretty sane.



Try this test. When you pull off the highway, as you're barreling down the offramp, push the clutch in or shift into neutral. If you suddenly hear the noise, it could be pinion angle. Otherwise, it probably isn't.



I say this because I have a '94 Ranger with a slightly-off pinion angle (I believe). It only makes noise under very light throttle at highway speeds, and under the conditions I described above.



At the same time, Steve M's also right about the little noises slowly driving you into an asylum!

 

[bighammer]

I was driving on a 2 lane road outside of town with a lot of flat, some gentle downhill, and a long not real steep uphill. I didn't notice it untill just before the hill, then it got louder and more steady up the hill. It did it on and off after, and then I stopped at a light about a mile beyond. Never did it again. If I were to guess what a blown off intercooler hose would sound like (if the truck kept running normally) this might be close. A bit deeper than typical turbo music, but seemed to go along with it. It was strange that it seemed to be coming from the back.

 

[dslcummins]

I have a noise coming from the rear on mine. It appears to be coming from the tires. If I move over out of the wheel tracks on the highway, it goes away. The wheel tracks are not as smooth of a surface as in between the wheel tracks. Same thing happens when I come upon a newly paved section of highway. I have factory Michelins on mine.

 

[bighammer]

I got it to do it again taday as I was near the top of a hill. Of course my 4 year old son was chattering away in the backseat, but I wonder if it could be the fan locking up. I put it in neutral, and it went away. I tried to get it to do it again and it was gone. Can't beleive the fan would engage at freezing temps though. Still puzzled.