997 carrera 4 gearbox grind / problem

[996turbotim]

Hi all, bought a 997 carrera 4 cabriolet 06my just out of warranty and all was going well. 2 weeks ago some slimeball tried to pinch my wheels by putting a jack under passenger side sill just in front of rear wheel arch area (right hand drive car) and missing jacking point, so when they attemted to jack car up it went straight thru plastic cover and thru the blue clutch pipe and brake vacuum pipe. i got a local porsche specialist to replace these items as porsche main dealer had a 2 week backlog in their workshop. after picking car up i noticed that when i changed in to 4th gear there was a grinding sound or if i changed down to 4th gear the same happened, however if i put my foot down on the clutch longer and dont rev the grinding doesnt happen. i have also struggled to get it in to 1st occasionally from standstill. i took the car back to the garage who replaced the pipes and they said it must be the gearbox however this didnt happen prior to the attempted wheel theft, i didnt notice someone had tried to steal my wheels untill the clutch pedal stuck down while i was driving the car, obviously the fluid had leaked thru the broken pipe, so a recovery truck had to pick me up and the car wasnt driven or a gearchange wasnt attempted, so could the new clutch pipe have a possible airlock in it or perhaps not have been bled properly, because i cant understand how my gearbox could be shot if i didnt change gear once the pedal stuck down, i couldnt even get it in to gear. i have also noticed the clutch pedal is lighter since the new pipe was fitted. i must point out that this has become a very stressfull problem, the thought of having to replace my gearbox sends a shiver down my spine as i am anticipating this could cost a small fortune, any help or ideas would be greatly appreciated,

many many thanks Tim.

[Loren]

Hi all, bought a 997 carrera 4 cabriolet 06my just out of warranty and all was going well. 2 weeks ago some slimeball tried to pinch my wheels by putting a jack under passenger side sill just in front of rear wheel arch area (right hand drive car) and missing jacking point, so when they attemted to jack car up it went straight thru plastic cover and thru the blue clutch pipe and brake vacuum pipe. i got a local porsche specialist to replace these items as porsche main dealer had a 2 week backlog in their workshop. after picking car up i noticed that when i changed in to 4th gear there was a grinding sound or if i changed down to 4th gear the same happened, however if i put my foot down on the clutch longer and dont rev the grinding doesnt happen. i have also struggled to get it in to 1st occasionally from standstill. i took the car back to the garage who replaced the pipes and they said it must be the gearbox however this didnt happen prior to the attempted wheel theft, i didnt notice someone had tried to steal my wheels untill the clutch pedal stuck down while i was driving the car, obviously the fluid had leaked thru the broken pipe, so a recovery truck had to pick me up and the car wasnt driven or a gearchange wasnt attempted, so could the new clutch pipe have a possible airlock in it or perhaps not have been bled properly, because i cant understand how my gearbox could be shot if i didnt change gear once the pedal stuck down, i couldnt even get it in to gear. i have also noticed the clutch pedal is lighter since the new pipe was fitted. i must point out that this has become a very stressfull problem, the thought of having to replace my gearbox sends a shiver down my spine as i am anticipating this could cost a small fortune, any help or ideas would be greatly appreciated,

many many thanks Tim.

I would start by using a power bleeder to completely bleed the brakes and clutch (they use the same circuit). There is a DIY in the 996 DIY section.

The fact that you can not get it into gear in first makes me think the clutch slave is not opening like it should - so bleeding would be first on my list.

[996turbotim]

Hi all, bought a 997 carrera 4 cabriolet 06my just out of warranty and all was going well. 2 weeks ago some slimeball tried to pinch my wheels by putting a jack under passenger side sill just in front of rear wheel arch area (right hand drive car) and missing jacking point, so when they attemted to jack car up it went straight thru plastic cover and thru the blue clutch pipe and brake vacuum pipe. i got a local porsche specialist to replace these items as porsche main dealer had a 2 week backlog in their workshop. after picking car up i noticed that when i changed in to 4th gear there was a grinding sound or if i changed down to 4th gear the same happened, however if i put my foot down on the clutch longer and dont rev the grinding doesnt happen. i have also struggled to get it in to 1st occasionally from standstill. i took the car back to the garage who replaced the pipes and they said it must be the gearbox however this didnt happen prior to the attempted wheel theft, i didnt notice someone had tried to steal my wheels untill the clutch pedal stuck down while i was driving the car, obviously the fluid had leaked thru the broken pipe, so a recovery truck had to pick me up and the car wasnt driven or a gearchange wasnt attempted, so could the new clutch pipe have a possible airlock in it or perhaps not have been bled properly, because i cant understand how my gearbox could be shot if i didnt change gear once the pedal stuck down, i couldnt even get it in to gear. i have also noticed the clutch pedal is lighter since the new pipe was fitted. i must point out that this has become a very stressfull problem, the thought of having to replace my gearbox sends a shiver down my spine as i am anticipating this could cost a small fortune, any help or ideas would be greatly appreciated,

many many thanks Tim.

I would start by using a power bleeder to completely bleed the brakes and clutch (they use the same circuit). There is a DIY in the 996 DIY section.

The fact that you can not get it into gear in first makes me think the clutch slave is not opening like it should - so bleeding would be first on my list.

hi loren, thanks for your swift response, so am i right in assuming that the grinding sound may be down to the system in need of being bled, is it a possibility? the grinding happens more than the first gear problem,

regards Tim

[Loren]

If the clutch is not completely disengaging or the slave is leaking back then it could be the cause.

If you did not have the problem before the damage then the most likely cause is air trapped in the system.