986 ticking in first gear from 1-3k rpm

[rwgottar]

Hi,

Hope someone can diagnose this problem I've been having recently. There is a ticking coming from the rear of my boxster when i accelerate in first gear from about 1000-3000rpm the best I can liken it to is the sound of having a playing card stuck in the spokes of a bicycle rim. The sound is not present if I just rev my engine when not in gear, or if I take off from second gear. Only in first gear..

anyone have any ideas or have experienced something similar?

Thanks!
Richard

[Steve Tinker]

1) If you roll down a hill in neutral is the sound still there?

2) There could be a chip on the 1st drive gear.

3) Check to see if there is any damage to your driveshaft rubber boots - if there's a tear and water / debris got in, the bearing(s) could be on the way out.....

Of course, it could be something simple like a stone embedded in your tyre or brake disc, but if it only happens in 1st gear probably not......

[Ghostrider 310]

Does the noise speed raise and fall with RPM? I'll guess noisy valve.