When my truck is in nuetral it makes this humming sound, if you push in the clutch the noise goes away. Clutch is in great condition, engages good and smooth. I am pretty sure that the transfer case is shot due to the excessive play that is in the front output shaft, I am replacing this in about a week. What I don't know is if the noise could be a throw out bearing possibly, or if it is a noise from the transfer case. Oh when you put the transfer case in neutral, and have the truck in neutral the noise is different, and not nearly as loud. I just would like to know if this could possibly be something to due with the clutch, so when I am putting the t-case in, I could fix the other problem at the same time, so I don't have to take it out twice. What do you think?

 

sounds like a throw out bearing...

 

x2 on the throw out bearing

 

Throw out bearings make noise when the pedal is pushed in, that's the only time they move. So it's something other than the throw out bearing, maybe the crank pilot bearing or tranny input bearing. Or the transfer case.

 

throw out bearings make noise when idle on the shaft and quit when the clutch pedal is depreesed and the brearing pushes against the fingers for the pressure plate.

 

So then the consensus is that it IS the throughout bearing?

 

It does sound like a throwout bearing......

 

Ahh glad you posted this. I am having a similar problem with my 99. It makes a whining noise when the clutch it pushed in, but no noise at all when you release it. I guess my throwout bearing is goin. . .

 

Mine always made a "little" bit of niose... Compared something, how audible is the sound difference between compressed clutch and non-compressed?

 

Throw out bearing!!!

 

When the clutch is pushed in there is no noise, when released and in neutral, sound like there is a nut bouncing around in the tranny. Weird thing is, two days ago the noise went away completly, but to my dismay came back today. Oh well, time to do some work!

 

My 82 made a similiar sound when the bearing on the imput shaft went out.

 

YES

 

Yea, it's a throw out bearing.

 

Frt input bearing , the throw out bearing makes noise when clutch is pushed in

 

you guys should hear my trany it sounds like monkey sex in nutral and when im driveing look out lol it so loud my frinds wont drive next to me on the road!!! but my trans is shot sorry i didnt help to much but hey im over tired and going to bed goodnight yt!!!

 

its the input shaft bearing if:

if noise stops when depressed

when rolling in 3rd at 15mph you engage 2nd with clutch still depressed and noise increases in intensity

 

Well, I think that it is definatly the input bearing. How long do you think I can drive on it the way that it is (it's freaking freezing in Wisconsin right now), and how much damage could be done if left to totally decinerate? I would like to fix it myself, any pointers? I have purchased the alldata.com program for my truck, but it is fairly useless when it comes to anything associated with the clutch, or transmission. (I've used that program for newer vehicles, and it is unbeliveable how great it is, but for this old of a truck, it was definatly a waste of money). I also have a Haynes manual, but everybody knows how useless those are. Thanks

 

I was playing with the truck again tonight and noticed that if you let the truck roll a little bit, stop it in a different spot, and let off of the clutch that the noise will go away. It seems to only make noise when in just the right spot, almost like once every rotation of the tire. I would think that if it were the input bearing, it would make noise anywhere the truck were parked? Somebody tell me if this makes sense, because now I am ready to rip out my hair, and don't want to put a new clutch in if not needed.

 

i exploded a t/o bearing because i figured it wasnt a big deal.......... IT Is. I the pilot bearing tough is generally quiet compared to the t/o bearing . soooooo, pedal in sweeeel- t/o, pedal out softer sweeeeel- pilot. dont let the t/o get too bad....they will blow up .