How does your PDK downshift in Sport/Sport+ mode?
02-10-2019, 06:32 PM
#16
Instructor
Thread Starter
2009 is early software. I would insist no software upgrade.
Due to early version PDK drain plug problems your pan may need to be replaced. Don't assume ...
Pull the plug first and replace the pan only if needed (save $500).
Gear selection is different based upon how you are driving. Does it shift like this under heavy braking or hard acceleration or only when you gently coast to a lower speed?
Rev matching is so fluid you can almost miss it on these cars. It is not like the blip you get with a manual transmission.
Due to early version PDK drain plug problems your pan may need to be replaced. Don't assume ...
Pull the plug first and replace the pan only if needed (save $500).
Gear selection is different based upon how you are driving. Does it shift like this under heavy braking or hard acceleration or only when you gently coast to a lower speed?
Rev matching is so fluid you can almost miss it on these cars. It is not like the blip you get with a manual transmission.
I haven't really driven the car hard so I haven't experienced heavy braking downshifts. And because I've seen this behavior, I tend not to downshift in higher RPMs, say 4k in third gear going into 2nd because I feel like there's unnecessary stress on the engine and transmission. I liken it to when you downshift in a manual car and just release the clutch without blipping the throttle, the engine gets "forced" to go into higher
RPMs.
I was not referring to you. Your definition of rev matching is correct. When the transmission downshifts, say on braking hard from 4th gear, the engine will blip up to match the higher revs of 3rd or 2nd. That blip is more dramatic when this is done energetically - say 60MPH approaching a sharp turn in 4th gear, hard on the brakes, the engine blips up and the PDK engages 2nd to make the turn at 35MPH.
Since you are taking the car to Fremont, Gunter will check it out. Miles-wise you are low, but PDK requires clutch oil change at 6 years or 60k miles whichever is lower.
Since you are taking the car to Fremont, Gunter will check it out. Miles-wise you are low, but PDK requires clutch oil change at 6 years or 60k miles whichever is lower.
If you are referring to downshifts that occur because you are slowing down, there is no need to rev match as the downshift won't occur until rpms drop. If you are referring to gear kickdown when you accelerate hard, the rpm increase and shift occur very closely and is not all that exciting. If you expect neck snapping acceleration you have the wrong car.
02-10-2019, 07:37 PM
#17
Nordschleife Master
02-10-2019, 07:56 PM
#18
Instructor
Thread Starter
Two things:
- I have the Base model
- I didn't say it's not there, I just said I didn't expect it
I do get some of that "put you back in your seat" acceleration from first to second gear, but not like the ones I experience from my C43 or F80 M3.
- I have the Base model
- I didn't say it's not there, I just said I didn't expect it
I do get some of that "put you back in your seat" acceleration from first to second gear, but not like the ones I experience from my C43 or F80 M3.
02-10-2019, 08:00 PM
#19
Nordschleife Master
02-10-2019, 08:04 PM
#20
Instructor
Thread Starter
02-10-2019, 11:01 PM
#21
Yes, that is correct. I drove it yesterday for a good 40-50 mins and everything was up to temp. Still, the tachometer needle wasn't snappy at all on downshifts. Instead of snapping into the higher RPMs, the tach needle would take its time to get to the RPM of the lower gear.
Had my wife take a short video yesterday while I was driving. Is that how it really shifts even in Sport+ mode? The warning indicators are for my TPMS
https://www.youtube.com/watch?v=7_M5BT592Mw
Thanks for the insights folks, I will bring the car tomorrow to the dealership and have a tech ride with me and they can confirm if the behavior is normal or not for the first gen PDK.
Had my wife take a short video yesterday while I was driving. Is that how it really shifts even in Sport+ mode? The warning indicators are for my TPMS
https://www.youtube.com/watch?v=7_M5BT592Mw
Thanks for the insights folks, I will bring the car tomorrow to the dealership and have a tech ride with me and they can confirm if the behavior is normal or not for the first gen PDK.
02-10-2019, 11:12 PM
#22
Instructor
Thread Starter