uphoto

actually it seems that it’s not that unlikely, I know I’ve read of a few people who have had multiple pdk failures in the same car. I’m guessing that there probably is a problem with the cars and not the pdk in those instances.

Jack F

What I meant was 2 PDK transmission failures in one car seems very unusual. This guy is the third owner. Cant likely blame it on the driver unless all 3 regularly beat the **** out of the car. 2 PDK failures in the same car should require that a Porsche regional specialist come evaluate the car for the real cause. Either they are being misdiagnosed and/or something else is causing this failure.

Arent there a bunch of PDK calibrations that can the dealer can perform?

Ark20

Thanks for the information. I have a icarsoft ii so will check if it can read temps.

Ark20

Will request the evaluation from a regional tech. Thanks

asellus

if by "a bunch" you mean "the only one" then yes. It's part of the PDK installation process.

Multiple failures of a single part typically leads to moving upstream. In this case, that's the controller, the shifter module, and the driver.

WP0

I've been at the race track regularly, and never heard of a driver causing a problem with PDK. How could a driver cause a PDK to fail (as the PDK is fool-proof, as far as I have determined)?

Jack F

You make a great point. When discussing over revs with the Porsche shop foreman, he said the only way to get overrevs with a PDK would be to be at the top of the rpm range and at that point get the wheels air borne. Then the car could get into the over rev range.mSo it seems extremely unlikely to have this happen.

good to hear that the OP’s car is going to be looked at by a higher up. It just makes sense to prevent unnecessary financial outlay and to find the cause of the problem.

Jack F

You make a great point. When discussing over revs with the Porsche shop foreman, he said the only way to get overrevs with a PDK would be to be at the top of the rpm range and at that point get the wheels air borne. Then the car could get into the over rev range.mSo it seems extremely unlikely to have this happen.

Good to hear that the OP’s car is going to be looked at by a higher up. It just makes sense to prevent unnecessary financial outlay and to find the cause of the problem.

WP0

How much do the Fidelity Platinum warranties cost annually? Thanks.

Fullyield

Overheating the PDK (usually on the track) and then continuing to drive the vehicle until PDK goes into limp mode instead of allowing vehicle to cool down. The distance sensors are electronic components located on shift rods inside the main case of the ZF case. The Cobb Accessport does allow drivers to monitor PDK oil temps while driving.

WP0

Never heard of PDK over-heating. . .but if it goes into limp mode, then it forces a cool down. .

Fullyield

Of course, that is why Porsche designed limp mode. The pre 2012 PDK lacked a gear oil cooler which was redesigned starting in 2012 PDK to add a gear oil cooler that uses engine coolant to warm gear oil on cold starts and cool oil when hot. Oil cooler functioned by ECU through a COV. So, engine cold/heat directly affects PDK oil cold/heat via heat exchanger. Some on here reporting driving their GT 4/ GT 3 while racing on track at 275-295 oil temps. LN Engineering recommends cool down at oil temps greater than 240 degrees. Limp mode is designed to force cool down but how much damage done to electrical components (distance sensors mounted to shift rods inside transmission case in oil) between 240 degrees and limp mode??? So, overheating PDK oil is a driver-controlled variable that can cause damage to the electronic components locate inside the PDK transmission case(shift rod distance sensors) which is the number one cause for PDK failures that cause PDK replacement. (DTC 173X….usually 1738).

WP0

Awesome detail! Thanks for sharing!

fsmich

LN Engineering recommends cool down at oil temps greater than 240 degrees(quote).......Engine oil temps or PDK oil temps? And do you know what the normal difference is between the 2 temps.

On the track I regularly see engine oil in the 270 range if outside air temp is above 85. I'm assuming the PDK oil runs cooler. I have not gone into PDK limp mode.

WP0

I don't look at other peoples' oil temperatures, but my 991.1 GT3 RS oil temperature hasn't ever gone over 220 degrees, as far as I've noticed. .(and I drive at Sebring and Daytona) .