question bout noise right when crank up but goes away when clutch is applied

badasslx13 said:

alright i sent a thread on here before bout this but n-e way when i crank my stang it makes this whining/roaring no vibration or nothing but when i push the clutch in it goes away an when im going down the road it makes this racket noise but when i push in the clutch or put it in neatrual it stops..guy at a local parts store said its the ''THROW OUT BEARING'' which i would be better off to go ahead an replace the clutch etc... so im buying a clutch kit for 115.00 ..so do yall think that is my problem please let me know your thoughts THANKS!

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Actually it sounds like the pilot bearing to me, not the throw out. Usually the throw out bearing will make noise when you push the pedal down. When the pedal is depressed, the throw out bearing contacts the fingers of the pressure plate and if it is bad, that is usually when it will make noise.
The pilot on the other hand, turns with the crank until you push the pedal down, then the needle bearings inside, stop with the input shaft. Therefore, if it is bad, it'll usually make noise because the casing is still turning with the crank while the inside bearings are not moving and are stopped with the input.
Just my .02


Richard
Tech Support
Tremec TKO Transmission Systems

LIke I said in my original post, sounds like the pilot. In all honesty, no one can tell for sure until you pull the tranny and inspect both the throw out and the pilot. The pilot bearing should cost no more than $15 and it would be a good idea to do the rear main seal while you're right there. That'll run about another $10-$20.
Once you get the transmission out, you can inspect the throw out. Hold it in one hand and spin the face of it with the other hand. A bad throw out will feel rough when spinning it. It should be smooth as silk when you spin the face of it. Next, check the collar of the front retainer(the piece that the throw out rides on). Make sure it is smooth and not scuffed up. The pilot is a little more tricky to diagnose because the only real way to check it is to pull it. In pulling it out of the crank, more often than not, it gets destroyed when removing it. You might try inserting your little finger in it and feel around for rough needle bearings and such. Like I said, when you start the car and the clutch pedal is not being depressed, the pilot turns with the engine. As soon as you step on the clutch, the input shaft stops turning and so does the needle bearings inside the pilot but the outer casing of the pilot continues to turn with the crank. Thus, the pilot is now "turning at 2 different speeds". That is where the noise comes in if it is bad.
Let us know what you find.

Richard
Tech Support
Tremec TKO Transmission Systems