Transmission sound, possible causes?

[navy'sporsche]

Rather frequently (but not always), I come to a stop, put it in neutral and let out the clutch and I can hear a marked "dry bearing" or "marbles rubbing together" noise from what seems like right below the center console storage box. If the clutch is depressed it completely disappears. If I quickly press it in and let it out, the sound sometimes goes away. It doesn't always happen, sometimes the tranny is dead quite.

I recently (< 3000 miles ago) had a new engine, clutch, and flywheel installed. This sound never occured before. Perhaps throw out, clutch alignment, etc?

My mechanic supposedly heard the noise and said it was typical gear noise, suggested an oil flush. Anybody have gear noises disappear after a tranny oil flush?

Any ideas or experiences welcome. Thanks

[larez2]

What you describe sounds like your throwout bearing. I had a similar issue - mine didn't start doing it until about 15k miles though. The noise mine made was really faint and if i pushed the clutch pedal down like 1/2 inch the noise would go away. A dab of grease did the trick applied by pulling back the dust boot on the clutch fork did the trick.

[phillipj]

Do you have a light flywheel?

[Loren]

I agree a throw out bearing and possibly the lever actuator if it has never been replaced.

Porsche upgraded the throw out lever arm after MY99.

[navy'sporsche]

thanks for the replys. I suspected the throw out bearing and not something more grave myself considering the noises started immediately after a new engine install and had never been there before.

It's a standard dual mass FW.