MotoJB

Thanks KC-FunnyGuy...there is a very distinct difference between the turbo sound and the sound I am experiencing. Do you have a turbo? If so, did you listen to my videos? Does your car sound similar? I bet not...did you already offer up any ideas?

MotoJB

Thanks for all of the input...car has 44k miles and not sure about track time. I was told none of course. Last owner had a different gt3 track car, so none for him. Prior to him, I don't know. Given where it was owned I suspect not.

KC-CarGuy

Yes I have a turbo. Yes I listened to the videos. No it does not sound like yours. I thought it was going to be the stereo ... but you ruled that out. My 944 Turbo developed a whine at highway speed. Fresh tires fixed it.

Just take the comment to be the light hearted comment it was intended to be. Good luck with solving your problem. :-)

MotoJB

All good...I get the humor but until I figure it out, it's not terribly funny (hopefully not terribly expensive)

Thanks.

Kevinmacd

Another area to check is the belt tensioners

KC-CarGuy

Solution yet?

MotoJB

Hey there, not yet...been traveling extensively. Have a mechanic looking at it on Tuesday. Will report back as soon as I know. Thanks.

993GT

check:
-wheel bearings
-and change , fluid levels in front diff and transaxle, drain plug for contaminants
-play in output flanges of diff/trans
-flex disc/guibo
-CV shafts for 'fluid' movement and play

fpb111

Did anyone watch the videos he posted somewhere on another thread? Would be interesting to hear comments after you watch them.

MotoJB

Wow, sorry...I thought I posted them on this thread.

Here they are:

Here are some videos where I tried to capture the noise. Pretty audible in these (poorly shot) videos. Thanks for your continued help/input!

911mhawk

Yes, and just did again.
Sounds close to what mine sounded like before getting rebuilt and I had similar on/off throttle characteristics.
Still, check what everyone's suggesting first and you have some great resources for advice based on your pm

911mhawk

Did you ever figure out what the noise was?
Figured since you're choosing wheel color it may have worked out ok.

MotoJB

No, not yet...mechanic checking it out tomorrow.

Can't let the new wheels/tires and suspension work be held up by whatever else is going on. Have to get it all done.

Will report back when I know! Thank you.

911mhawk

Know the scenario well, good to hear that's your attitude too

MotoJB

Well, it's official. My transmission is toast.

How foolish it was to trust Zuluracerx and his "fresh" PPI from BBI.

With an extremely loud kline 3" decat exhaust and the stereo, I didn't hear the transmission noises until after I bought the thing. The noises only became evident with no stereo and after a bit more time, while on the freeway. Couldn't hear it around town.

Moral of the story? Don't trust anyone (no matter how well they check out and what they say) and get your own PPI done. (DUH)

In the end, people who say they'll "stand by the car should you have any problems"...don't. Instead they accuse you of ruining the transmission by "launching the car", etc. Not the case. I cautiously drove the thing home in 6th gear, to and from the grocery store, to and from cars and coffee (in town) and to and from the Porsche shop to diagnose the noises. That's it. Anyhow, my fault for buying without getting it thoroughly checked.

Anyhow, I'll be happy with the car once the transmission is rebuilt but damn, what a HUGE unexpected expense right out of the gate. Big lesson learned.

Good thing my wife is taking it so well.