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therock88

Metal popping noise from rear when slipping under hard acceleration ?

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Hi All....

Haven't posted in a while, but was hoping someone may have some insight/thoughts on a new issue I just encountered.

My car has a Softronic tune, and runs great! I have not had it out much due to the lovely Illinois winter....The other day

I took it out for lunch...No snow on the ground but some residual salt dust from the last freeze.

So I probably did not let the car warm up enought (shame on me)....I drove a short distance and I punched it ( I missed that :))...When the turbos's spooled up the car broke loose all wheels like usual ( Tiptronic BTW)...As the wheels started spinning/slipping I noticed a not so good sound (sounded like the rear)...Sounded like popping metal...like something in

the drive train was slipping (or even breaking??). Never heard it before?? When I accelerate very hard (but not enough

to spin the wheels.....No noise at all...Drive normal or even hard...no noise....Only if I bury the pedal and it breaks looks I hear a few pops/knocks. No other time??

Notes: Car was not completely warm, temperature was in the 30's, salt dust on road, Tiptronic transmission.

I called my dealer and left a message for my mechanic to see if he has any thoughts...waiting to hear back. Service guy

said it may be due to it being cold (weather and car??)

Would love to hear any thoughts on the subject....Without scaring me too bad....I have no warranty any longer :)

Thanks

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Follow up for anyone checking....My dealer mechanic who is a Gold Master Certified Porsche mechanic suggested the combination of cold, slipping (cold) tires and traction control may be what I heard...No leaks or anything and no sounds at any speed accept when it was WOT and all four wheels slipping ..? I will likely get the fluid/filter and both differntial oil changed when it warms up just to be safe....

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Who services your car in the Chicago area? I suspect the noise you heard was the PSM kicking in, and activting your ABS to keep the car going straight-ish. All normal. If that's what it was. Coupld also have been the combination of the PSM and salt residue bouncing around in your wheel wells.

Be careful out there. The combination of cold weather, BIG F A T tires, dirty roads, gobs of turbo power (+450 HP and +425 torque) you are asking for trouble. And the PSM and AWD ain't gunna save your arse every time.:)

And don't hammer on her (as you knew) until she reaches full operating temp. I might want to buy her some day.:):)

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You are correct! And I know better...Just had a lapse of judgement and a short ride :) And it is putting down even more HP etc now with

the Softronic tune and other stuff :) Thanks for the comments....I will have to post up some new pics with the various additions like front DRL LED's and Rear Dectane LED lights...All white LED everywhere else...Sure changes the look!

Take care!

Donnie

PS..Mechanic is at Autohaus Porsche of Peoria...Chad. Great guy, and mod friendly!

Edited by therock88

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Donnie, I am driving (well, in April I will be again, currently in hibernation) your grandfather. She was "born" not too far from you. Isringhausen was the delivering dealership back in late 1996 to owner #1. I am at least owner #5, but have put the most miles on her. I've done more miles in our 3 years together (32Kish) than the prior owners combined.

post-9898-0-93833200-1359656206_thumb.jp

Edited by White987S

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Very Nice! I really like your car...I had one of those as well a while back and it was great...Still air cooled, and a blast to try and change the oil :) I actually bought my Turbo (and wife's last BMW X5) from Isringhausen (Luke Isringhausen to be specific).

Great delaership....Peoria is just closer to me and always treat me well....Thanks for sharing...Car looks great....

Edited by Loren

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