Gearbox issues C7.5 PE - Stage2
Posted: Thu Jan 13, 2022 4:45 am
Gents, first time RS owner - I got into a 2017 RS6 performance, here in australia they are a little more rare than europe!
This is my dream car, so i got straight into getting it to my spec - i've had brondex catless downpipes installed along with the evolve technik stage 2 tune.
Took the car to the drag strip - dynamic mode on, ESC totally off, brake boost launch. The car would get out of the hole fast, and then when i tried to click second gear, the gearbox wouldnt change. It went immediately into limp mode - i drove the length of the track in first gear, switched car off, switched back on - gearbox now works again.
However i've noticed, when the car is in Drive (auto), when taking off from a complete stop there will be almost a lurch in the gearbox immediately as it starts to roll away. If you take off fast, its very very noticeable. Its almost like the clutches arent engaging early enough and then suddenly it'll lurch forward. I also noticed that when the car is rolling, if you put your foot down to overtake or something, the car will BANG back down into gear, its not smooth at all like it was pre drag strip incident.
The other thing to note, is that the car drives perfectly smooth in manual mode. No lurch from standstill, changes up and down beautifully.
Anyone experienced something similar? Any advice on what i need to be looking at?
First steps for me will be to reset the tcu back to factory (i read that the gearbox learns? im thinking maybe its out of whack somehow). And i also intend to put a TCU tune in it to see if that makes a difference.
I understand issues like this are very hard to diagnose online - but its a fairly obvious issue and if anyones experienced it before i'd love to hear what you found.
cheers!
J
This is my dream car, so i got straight into getting it to my spec - i've had brondex catless downpipes installed along with the evolve technik stage 2 tune.
Took the car to the drag strip - dynamic mode on, ESC totally off, brake boost launch. The car would get out of the hole fast, and then when i tried to click second gear, the gearbox wouldnt change. It went immediately into limp mode - i drove the length of the track in first gear, switched car off, switched back on - gearbox now works again.
However i've noticed, when the car is in Drive (auto), when taking off from a complete stop there will be almost a lurch in the gearbox immediately as it starts to roll away. If you take off fast, its very very noticeable. Its almost like the clutches arent engaging early enough and then suddenly it'll lurch forward. I also noticed that when the car is rolling, if you put your foot down to overtake or something, the car will BANG back down into gear, its not smooth at all like it was pre drag strip incident.
The other thing to note, is that the car drives perfectly smooth in manual mode. No lurch from standstill, changes up and down beautifully.
Anyone experienced something similar? Any advice on what i need to be looking at?
First steps for me will be to reset the tcu back to factory (i read that the gearbox learns? im thinking maybe its out of whack somehow). And i also intend to put a TCU tune in it to see if that makes a difference.
I understand issues like this are very hard to diagnose online - but its a fairly obvious issue and if anyones experienced it before i'd love to hear what you found.
cheers!
J