S-tronic hesitates
11-23-2011, 06:40 AM
#11
AudiWorld Super User
No disrespect intended, as I do appreciate your help: downshifting to accelerate for a pass is routine. On a 2 lane road, putting along in 7th/2000rpm's at 65 I would expect I would grab 3rd at whatever rpm's to execute the pass and quickly get to XX mph
.
Otherwise, yeah, I'm doing it to slow. When I do, the rpm's rise appropriately, but on engaging there is a lurch as the resistance hits.
I just went out in the S4 and then my R32/DSG and will start a new thread to report......
. Otherwise, yeah, I'm doing it to slow. When I do, the rpm's rise appropriately, but on engaging there is a lurch as the resistance hits.
I just went out in the S4 and then my R32/DSG and will start a new thread to report......
clutch, disengage 7th, rev the **** out of the engine to the speed it needs to be to match where 3rd will place the engine RPM, engage 3rd, release clutch.
Very normal for it to hesitate while revving the engine for a change on the same shaft, however if in this same scenario, you pull the "-" paddle 4 fast times, will be faster (oddly enough) and sequentially drop through the gears.
Here's a video I shot showing how fast you can downshift hitting the paddles - note the gear indicator in the bottom left of the DIS and the tach - you almost cannot even see the individual gears as it moves through them
I start this video in 7th gear BTW
http://www.youtube.com/watch?v=k2W4Pj3DsTg
11-23-2011, 07:35 AM
#12
Audiworld Junior Member
Join Date: Jun 2011
Location: NH
Posts: 52
Likes: 0
Received 0 Likes
on
0 Posts
Scenario
I would be very interested in seeing a video from gmermel of what he is describing. But it sounds different than your video because you are downshifting while slowing and the tach is not downshifting to over 4K. Sounds like he is downshifting while accelerating in the meat of the powerband. So he is gassing it around 3500 RPM right when the car is in the sweet spot and downshifting to 5K while accelerating.
11-23-2011, 08:05 AM
#13
AudiWorld Super User
I would be very interested in seeing a video from gmermel of what he is describing. But it sounds different than your video because you are downshifting while slowing and the tach is not downshifting to over 4K. Sounds like he is downshifting while accelerating in the meat of the powerband. So he is gassing it around 3500 RPM right when the car is in the sweet spot and downshifting to 5K while accelerating.
11-23-2011, 12:03 PM
#14
AudiWorld Member
Thread Starter
Join Date: Jun 2011
Posts: 173
Likes: 0
Received 0 Likes
on
0 Posts
See in this exact situation you list, 7th and 3rd are on the same input shaft, and it will take a long second for the DSG to hit 3rd, as it has to:
clutch, disengage 7th, rev the **** out of the engine to the speed it needs to be to match where 3rd will place the engine RPM, engage 3rd, release clutch.
Here's a video I shot showing how fast you can downshift hitting the paddles - note the gear indicator in the bottom left of the DIS and the tach - you almost cannot even see the individual gears as it moves through them
http://www.youtube.com/watch?v=k2W4Pj3DsTg
clutch, disengage 7th, rev the **** out of the engine to the speed it needs to be to match where 3rd will place the engine RPM, engage 3rd, release clutch.
Here's a video I shot showing how fast you can downshift hitting the paddles - note the gear indicator in the bottom left of the DIS and the tach - you almost cannot even see the individual gears as it moves through them
http://www.youtube.com/watch?v=k2W4Pj3DsTg
Your description of the mechanics involved is helpful, but the description I've made applies to a 7-4 downshift as well......
Your video looks and SOUNDS the way I would expect the S-tronic to work. Even the sound as the RPM's jump is musical. Mine ain't that way....
I'm sure something is wrong. And am getting the car serviced.
Thread
Thread Starter
Forum
Replies
Last Post
AndrewM (azdaspeed3)
A4 (B5 Platform) Discussion
4
10-30-2001 09:50 AM
