Potential gearbox problem?
Hello again guys,
First of all a little intro to what ive been doing so far. Brand new C2S with Tiptronic tranny, decided to go easy for the first 700 km's and then progressivly rev it harder from there until 1500 km's where its basically FFA. Got a few friends that have done the same with their Porsches and have had no problems, and possibly even better performance than the recommended break in technique (low revs up to 3k). Dont worry this isnt a thread about break in techniques
Anyway, just past 800 km's, I started flooring it every now and then. Between 800 to 1100 km's, out of the several full throttle applications that ive done, on 2 of them, the engine over-revved (got into redline) instead of shifting, while in normal D mode on the tiptronic. As soon as it overrevved, I felt significant engine braking and a kind muffled-tense noise (as youd expect when engine breaking is applied at over 7k RPM) until the revs went back to 7k, and only then the tiptronic tranny shifted to the next gear. Asked a mate of mine and he said it sometimes happens on his 997 Carrera too, and is nothing to worry about.
However, at 1200 km's, the same thing happened again, overrev and engine breaking etc. However, this time, a very high pitched "Awwwww" sound came from the rear of the car too that lasted for like 1 second, until the gear finally shifted.. and thats gotten me really worried. I have no idea what it was... it sounded a bit like a blow-off valve when releasing air or something.. I dunno.
Ive floored it many many times by now and its been ok all of the times, sports mode and in normal mode.. but those 3 times when it went wrong (all in normal mode, and oil temp between 80-90) have really gotten me worried
especially the last one cause of the sound it made.. Anybody got any idea if this is normal and if not, what could be causing it? And especially what that last sound was all about? Should I go and have my gearbox checked out?
Thanks for the help guys!
First of all a little intro to what ive been doing so far. Brand new C2S with Tiptronic tranny, decided to go easy for the first 700 km's and then progressivly rev it harder from there until 1500 km's where its basically FFA. Got a few friends that have done the same with their Porsches and have had no problems, and possibly even better performance than the recommended break in technique (low revs up to 3k). Dont worry this isnt a thread about break in techniques
Anyway, just past 800 km's, I started flooring it every now and then. Between 800 to 1100 km's, out of the several full throttle applications that ive done, on 2 of them, the engine over-revved (got into redline) instead of shifting, while in normal D mode on the tiptronic. As soon as it overrevved, I felt significant engine braking and a kind muffled-tense noise (as youd expect when engine breaking is applied at over 7k RPM) until the revs went back to 7k, and only then the tiptronic tranny shifted to the next gear. Asked a mate of mine and he said it sometimes happens on his 997 Carrera too, and is nothing to worry about.
However, at 1200 km's, the same thing happened again, overrev and engine breaking etc. However, this time, a very high pitched "Awwwww" sound came from the rear of the car too that lasted for like 1 second, until the gear finally shifted.. and thats gotten me really worried. I have no idea what it was... it sounded a bit like a blow-off valve when releasing air or something.. I dunno.
Ive floored it many many times by now and its been ok all of the times, sports mode and in normal mode.. but those 3 times when it went wrong (all in normal mode, and oil temp between 80-90) have really gotten me worried
especially the last one cause of the sound it made.. Anybody got any idea if this is normal and if not, what could be causing it? And especially what that last sound was all about? Should I go and have my gearbox checked out?Thanks for the help guys!
