99 Cab top problem

[butch199]

I have a problem with my 1999 996 CAB top, first my rear window delaminated and I founnd a shop that would stich in a new one. I had not dropped my top for several wweks and it would only unlatch at the windsheild and time out!

I manually got the clamshell open and discovered that one of the hydraulic rams was leaking. I have pulled that and am getting it rebuilt(saves a lot as Porsche wantts $600. for one)

My question is why di my clamshell not open? it is driven by a motor not hydraulics. When I manuallyu open and close it(by using emergency procedures in the manual, I can feel resistance, but I assume that is because the motor is resisting.

Any ideas on what could go wrong with the drive mechanism of the clamshell, looks like motor and cable would be easy DIY.

What does a new or used clamshell drive unit cost?

Thanks for help in advance

[wvicary]

The drive assembly for the clam shell has been updated because the old one would break teeth off the internal drive and cause the clam shell to go out of time.

[JeTexas]

I would try to calibrate the top once you get the ram re-installed and see if that cures things before you start messing with the clamshell motor. The entire top mechanism is very dependent on timing and microswitches. If one thing is off, it won't start moving the next piece. You can also check the clamshell's position sensor, which is right by the hydraulic release nut.

[spankey]

I have a ram leaking also.

The question I have is where can I get it rebuilt. I live in Oshkosh Wisconsin. The last time I paid $250.00 for a used one and I would rather rebuild the one I have now.

I have a 1999 cab.

Thanks for any info.