Howling C4S

[WARDHOG]

I've notice a strange howling noise cruising in second gear at exactly 2900 RPM and will go away as soon as the throttle is pushed a little bit. It sounds like it's coming from the rear of the car. Can't really tell if it's the engine or tranny. It only happens once in awhile. Car has 12800 miles on it and all the fluids are checking good. Have no leaks that I can tell. Have been using 10W30 Mobil1 as directed by my dealer because of the hot and humid climate I live in. It's about due for it's first inspection and would like some ideas on what it could be to maybe have the dealer check it out. TIA!

P.S. I'm going to start using 0W40 Mobile1 as directed by Porsche. Will that be alright to do?

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[Scouser]

Have you upgraded the exhaust tips. I know that misaligned tips can catch the wind at some speeds.

[WARDHOG]

Have you upgraded the exhaust tips. I know that misaligned tips can catch the wind at some speeds.

No, same stock tips.

[Dr. T]

Wardhog,

Have you noticed the howling go away when you depress the clutch? If so it could be from the hydraulic system. Here's a recent post from 6speedonline Hydraulic noise

Good luck,

-Glen

[WARDHOG]

Wardhog,

Have you noticed the howling go away when you depress the clutch?  If so it could be from the hydraulic system.  Here's a recent post from 6speedonline                    Hydraulic noise

Good luck,

-Glen

I haven't tried pushing the clutch in while it's howling. I'll try it next time it starts howling and try to keep the RPMs at 2900 at the same time. just hope it's not a bearing going out.