Another A8 question - downshift
Thread Starter
Burning Brakes
Joined: Oct 2017
Posts: 1,230
Likes: 467
From: Colorado
Another A8 question - downshift
I have a 2016 A8 and I don't think I have what has been described as "shudder".
My problem: I live in Colorado and the hills that go with it. While in M mode downhill, I'd downshift to assist in braking. As it holds the gear for about 5seconds and then it appears to just let go (like it pops into a much higher gear, not neutral but close), causing downhill acceleration and more brake. It does this about 10seconds, then decides it wants to go back decelerating. This happens on big mountains and small downhills.
I did a search and couldn't find similar issues. Any suggestions? Ideas? Heard of it?
My problem: I live in Colorado and the hills that go with it. While in M mode downhill, I'd downshift to assist in braking. As it holds the gear for about 5seconds and then it appears to just let go (like it pops into a much higher gear, not neutral but close), causing downhill acceleration and more brake. It does this about 10seconds, then decides it wants to go back decelerating. This happens on big mountains and small downhills.
I did a search and couldn't find similar issues. Any suggestions? Ideas? Heard of it?
Instructor
Joined: Jul 2016
Posts: 140
Likes: 14
I have a 2016 A8 and I don't think I have what has been described as "shudder".
My problem: I live in Colorado and the hills that go with it. While in M mode downhill, I'd downshift to assist in braking. As it holds the gear for about 5seconds and then it appears to just let go (like it pops into a much higher gear, not neutral but close), causing downhill acceleration and more brake. It does this about 10seconds, then decides it wants to go back decelerating. This happens on big mountains and small downhills.
I did a search and couldn't find similar issues. Any suggestions? Ideas? Heard of it?
My problem: I live in Colorado and the hills that go with it. While in M mode downhill, I'd downshift to assist in braking. As it holds the gear for about 5seconds and then it appears to just let go (like it pops into a much higher gear, not neutral but close), causing downhill acceleration and more brake. It does this about 10seconds, then decides it wants to go back decelerating. This happens on big mountains and small downhills.
I did a search and couldn't find similar issues. Any suggestions? Ideas? Heard of it?
Burning Brakes
Joined: Apr 2018
Posts: 1,051
Likes: 690
Torque converter lock-out. Or the lack of it. When it senses that the difference in load from the transmission side is greater than the load on the engine side, the TC will release the lock-out clutch and allow the transmission side to spin faster than the engine side and let the fluid and the turbines in the TC to ease the load, rather than let the engine take the brunt of the deceleration load.
Every auto I've ever driven does that.
Every auto I've ever driven does that.
Pro
Joined: Jan 2014
Posts: 585
Likes: 65
From: Sierra Nevada Foothills CA
I have a 2016 A8 and I don't think I have what has been described as "shudder".
My problem: I live in Colorado and the hills that go with it. While in M mode downhill, I'd downshift to assist in braking. As it holds the gear for about 5seconds and then it appears to just let go (like it pops into a much higher gear, not neutral but close), causing downhill acceleration and more brake. It does this about 10seconds, then decides it wants to go back decelerating. This happens on big mountains and small downhills.
I did a search and couldn't find similar issues. Any suggestions? Ideas? Heard of it?
My problem: I live in Colorado and the hills that go with it. While in M mode downhill, I'd downshift to assist in braking. As it holds the gear for about 5seconds and then it appears to just let go (like it pops into a much higher gear, not neutral but close), causing downhill acceleration and more brake. It does this about 10seconds, then decides it wants to go back decelerating. This happens on big mountains and small downhills.
I did a search and couldn't find similar issues. Any suggestions? Ideas? Heard of it?
