Funny noise from engine bay

While driving our 348 I am hearing a sound from the engine bay that oddly sounds like a turkey. I know, I know, interesting way to describe a sound, but that is what it sounds like.

While cruising at just about any speed it is faint, but noticeable. It is not constant, and comes and goes randomly. If I put the car in neutral and coast the noise goes away. While still in neutral if I rev the motor the sound is not present (should eliminate tensioner bearings, water pump, A/C, alt). Only after putting the car back into gear does the noise come back.

I do not hear the noise while sitting still, only when moving.

Any ideas?

 

LOL..... Yeah, no turkey in there. Tranny fluid level is fine. Just put Mobil 1 in there a month or so ago. Bumps do not seem to affect it at all. The only time I hear it is when we are driving. If I take it out of gear and coast the noise will go away until I put it back in gear. So it doesn't appear to be something loose rattling around back there. A/C has been off.

If I understand the workings of the tranny, everything is spinning while the car is rolling so I don't suspect a bearing going out. Or should I? I can rev the engine while in neutral and there is no noise so it doesn't appear to be engine related. I am scratching my head here.

 

One thing to note... I found a few drops of gear oil today when I pulled her out of the garage. So my tripple seals are going out. But this wouldn't cause the noise I am hearing, or at least I would think it would.....

Either way, I at least have a clutch job coming up.

 

I pulled the pumpkin off today to see where our leak was coming from. The leak was from the slave cylinder/TO Bearing. I have ordered the Hill T/O bearing from Daniel along with the triple seals(not currently leaking).

After pulling the clutch apart I noticed that the bearing at the back of the flywheel sounded a little rough. It wasn't horrible, but it was not as smooth as you would expect. So I will probably replace that too while I am in there.

Had some typical hot spots on the flywheel, but I don't know if I should have it machined or just leave it alone. Thoughts?

On another note... Since I have the entire back end of the car apart I decided to go ahead with removing the mufflers and run pipe from the cats back. Which in hindsight is pretty stupid because the noise problem that I was having will not be heard whether I solved the problem or not.. LOL!!!



BTW... When does the clutch fluid stop dripping out??? It's like the energizer bunny.......still going!!!

I will post photos shortly...

JL

 

I posted photos in the tech section...


http://ferrarichat.com/forum/showthread.php?t=144661

 

After months of chasing this mysterious sound I was finally able to track it down. As it got louder and louder it was a little easier to pin point the location..

And the winner is.......... right rear wheel bearings... Since we just had our baby girl in January I have not had time to get under there and do the job myself so I took it to a shop where they verified that it was in fact the wheel bearings. Should have her back on the road next week...