Gents, need a little help here.

I have 2011 Cayman S with factory PDK. The car is a track only car for me (DE and open track, no wheel to wheel).

Sometimes, when I go to reverse out of the trailer, or out of the garage, after the car has been sitting....I have no reverse.

I can hear it go "into" reverse, but if I apply throttle its as if the car is still in neutral.

No codes, no CEL. No difficulty moving the shifter. If I go to "drive" it immediately works going forward, but I may or may not have reverse.

Ordinarily I wouldn't care, but.....on track outs coming out of fast turns, the transmission sometimes will fail to shift and its extremely unsettling to the car at speed, as if it cant make up its mind what gear it wants to be in while running is sport plus.

I can't make it happen, its completely random so my local dealer has no idea......

thoughts??

 

have you had it serviced ?

 

Had the exact same issues on my '09. Mine resulted in the tranny being replaced. It appears that if the clutch fluid gets too hot is does something to an internal sensor. Seems porsche has recognized this and now offers a sensor update. I have a guards LSD and this just adds heat to the clutch side fluid temperature.

Better take it to the dealer. Then run a cooler if you do track days.

 

Bill, I've got the same, both Guard LSD and a cooler.

Did you have the valve body replaced or just the sensor? Do you remember the cost and or part number?

 

Porsche just replaced the entire trans under warranty. Dealer even swapped the Guard LSD from the old to the new trans.

I bet John at BGB knows the answer.