Instarand

i have a 997.2 C2S MT and I can't help but notice a mechanical thump like noise when shifting out of 2nd and into 3rd, most noticeably at slower driving speeds. If I consciously press the clutch in super fast I can often shift without the noise. Does anybody else hear this noise? if you've ever shifted too quickly before enough clutch was given...and you hear the transmission sort of forecefully disengaging, it's a similar noise that I'm experiencing. But it happens almost every time at slower speeds from 2nd to 3rd.

Linnm

Check motor mounts

Petza914

Probably the sound of the springs on the pressure plate as the friction disc is mating to the flywheel. If you have semi-solid motor mounts, this will be more pronounced than with stock ones. Try it letting the clutch out slowly and see it it makes the same sound. I don't think it's anything to worry about.

Instarand

What do you mean by "semi-solid" motor mounts? Also, I hear the clunk/thump noise on the early side of the shift out of second. By the time the gear shifter is in third and I'm re-engaging the clutch it already happened.

So the noise happens when I'm depressing the clutch in 2nd and beginning the upshift into 3rd. Strange why this doesn't happen in any other gear, or if the shift from second to third is done while drivin slightly more aggressively.

Thanks for the reply BTW!

Petza914

High performance motor mounts like those from RSS, We've, Rennline, etc. They are firmer and less isolating from engine vibration. They hold the motor more securely for better and more predictable handling.

if your noise is before the clutch reengagement then it's something else.

Instarand

Ah, thanks for clarifying. Yeah the sound is totally while the clutch is disengaging. It almost sounds like it's struggling slightly to let go of the gear. I'll have Porsche look at it during my next service. Thanks for the input.