When driving in manual mode I notice sometimes when I press the paddles there is a 1-2 second delay before the transmission actually up-shifts. The trans just does this randomly with no pattern of a specific gear, shift modes, or throttle position causing this.

Just to clarify, I am not talking about a SLIPPING clutch, I am referring to the delay when I pull the paddles to the time when it actually decides to shift. For downshifts I have never experienced any delays, only up-shifts. It would never delay for two gears consecutively, I have felt it delay for all gears expect for 5th to 6th.

My car is stock. I've heard of modded sst's have loong delays shifting from 1st to 2nd, but has anyone with stock or near stock MR done this?

 

Yes this issue has been brought up in another thread but nobody has an answer..

https://www.evolutionm.net/forums/mi...nual-mode.html

 

Recently I've noticed it happens more on a set of gears on mine, 1-3-5, which could indicate a worn clutch or not enough pressure in the odd gears..

 

Same here, just very irregular with the shifting and noticeably more after the dealer service bulletin reflash

 

Bro my car is stock as well from what I know and my experience with it, it has something to do with the throttle for example with WOT in all modes the shift command is almost instant... But with light throttle load it does delay a little in all modes...I've also experienced this delay with the gtr and I've seen a mclaren P1 click the up shift and literally took it a sec to up shift while he was in race mode and he was easy on the throttle.....with me anything before half the throttle it delays half way and more it shifts immediately...and on top of that i think my clutches are fried Lool....

 

Yes, that is what I noticed as well. When going WOT the car shifts super quick, but in traffic and under low throttle it sometimes delay going into the next gear.

I guess it's just the nature of a dual clutch trans. It's annoying, but I've learned to deal with it.

Perhaps this is a problem that can be solved by someone who can tune SST tables.

 

This is most noticeable when driving S-Sport, manual, gentle driving. For the sake of kicking down RPMs, you upshift after lifting or having little/no throttle input. When you lift though, SST S-Sport program predicts you actually intended to downshift and so pre spins the opposite input shaft speed, clutch slip profile for a downshift. Why? So that the there won't be as much RPM delta and synchro wear in actually sliding into that lower gear. If you log it on Evoscan, you can see that when you lift, the opposite input clutch slip speed jumps from trailing to leading. Then you pull a fast one on the trans and select upshift instead. Now SST has to reverse the opposite shaft's momentum all of which takes more time than otherwise. You see this as the delay. This won't happen had you kept positive throttle input, consistent with the more aggressive program defined by S-Sport mode. I hope this makes sense.