Car nosedives on 2-3 shift
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,841
Likes: 202
From: miami / delray beach
2014 E63s amg 4matic, 2009 C63, 2006 E55 AMG , 2001.5 AUDI S4 stg 3+ w/meth
Just to be clear with my experience, I never had a problem prior to the TCU tune so I'm not sure we can rule it out. It is likely that the ECU is taking control of it but prior to the TCU tune I had no issues and it is not happening in all E55's either since there are 2 other cars local to me with similar mods that do not do it.
MBWorld Fanatic!
Joined: Jul 2009
Posts: 1,196
Likes: 1
From: SoCal
2013 E63 AMG
Just to be clear with my experience, I never had a problem prior to the TCU tune so I'm not sure we can rule it out. It is likely that the ECU is taking control of it but prior to the TCU tune I had no issues and it is not happening in all E55's either since there are 2 other cars local to me with similar mods that do not do it.
See my thread over on the C63 forum:
https://mbworld.org/forums/c63-amg-w...rag-strip.html
MBWorld Fanatic!
Joined: Dec 2005
Posts: 6,759
Likes: 96
From: NH
2012 C63 BS & 2014 E63 Estate & 2008 CLK63 BS
Guys, I really don't think it has anything to do with your TCU tune since my 2011 C63 does the same thing and my TCU hasn't been touched (nor can it for that matter since I think it's housed inside the tranny itself).
See my thread over on the C63 forum:
https://mbworld.org/forums/c63-amg-w...rag-strip.html
See my thread over on the C63 forum:
https://mbworld.org/forums/c63-amg-w...rag-strip.html
Super Member
Joined: Mar 2011
Posts: 502
Likes: 0
From: Porter Ranch, CA
E55, CTS-V Wagon, Duc 1098R
Maybe I wasn't being clear. All I said was not to rule it out and I agree that the ECU is likely controlling. In my case, once I did the TCU it happened. That's all I'm saying.
MBWorld Fanatic!
Joined: Mar 2011
Posts: 1,879
Likes: 22
From: Orange County, CA.
one car at a time
I am sorry but this problem does not happen on "all e55s" - stock and other modded cars have been free of this. I wonder if it is a heat issue.
SPONSOR
Joined: Jul 2007
Posts: 5,459
Likes: 152
From: Houston/ Austin /Toronto / UAE / Minneapolis / Orlando /Cincinnati
Eurocharged Performance ML63 and TT lambo
Just to be clear with my experience, I never had a problem prior to the TCU tune so I'm not sure we can rule it out. It is likely that the ECU is taking control of it but prior to the TCU tune I had no issues and it is not happening in all E55's either since there are 2 other cars local to me with similar mods that do not do it.
We are on top of it and will figure out a solution.....
SPONSOR
Joined: Jul 2007
Posts: 5,459
Likes: 152
From: Houston/ Austin /Toronto / UAE / Minneapolis / Orlando /Cincinnati
Eurocharged Performance ML63 and TT lambo
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Super Member
Joined: Oct 2008
Posts: 837
Likes: 25
From: seattle
1990 300ce supercharged and intercooled
Besides tunes there is also the distinct possibility that you guys are just slipping in the the transmission and that the computers are pulling power more from that. If you have a lot of power and the shift does not complete in the correct amount of time then the car will extend shift time and pull back more. The more power you make the more it will be noticeable. Might be time for a trans build or at least modified valve bodies.
MBWorld Fanatic!
Joined: Nov 2004
Posts: 6,697
Likes: 381
2005 E55
lol but you needto understand that we dont share a single thing with you c63 guys.
your issue can be something completely different.
We have an ancient tranny that was built from aliens and need to get this sorted out.
We only wish we had the 7 speed in our cars
your issue can be something completely different.
We have an ancient tranny that was built from aliens and need to get this sorted out.
We only wish we had the 7 speed in our cars
MBWorld Fanatic!
Joined: Nov 2009
Posts: 1,564
Likes: 6
AMG Fam
I don't think its slipping, It just feels like the car electronically does something to stop either fuel delivery, close throttle body etc for that split .5 second. It literally feels like a glitch of some sort.
Super Member
Joined: Dec 2009
Posts: 848
Likes: 6
From: New Cumberland, PA
ML63
Hey I said that I didn't notice this until my TCU tune I am not point fingers or suggesting anything. I also said I don't go full throttle much. With the TCU tune I might have pushed my car more than usual to see how well it shifted that is when I noticed the stalling or whatever you want to call it.
Damn I was hoping I could blame it on the TCU for a free fix by "Team Euro Charge".
Damn I was hoping I could blame it on the TCU for a free fix by "Team Euro Charge".
MBWorld Fanatic!
Joined: Dec 2007
Posts: 1,461
Likes: 9
From: Treasure Island, FL
GLE 63S
MBWorld Fanatic!
Joined: Aug 2010
Posts: 2,156
Likes: 7
From: Northern Va
Dirt Scooters
Besides tunes there is also the distinct possibility that you guys are just slipping in the the transmission and that the computers are pulling power more from that. If you have a lot of power and the shift does not complete in the correct amount of time then the car will extend shift time and pull back more. The more power you make the more it will be noticeable. Might be time for a trans build or at least modified valve bodies.
Super Member
Joined: Jul 2011
Posts: 503
Likes: 0
2010 E350, 2011 ML350, 2003 996TT
Super Member
Joined: Oct 2008
Posts: 837
Likes: 25
From: seattle
1990 300ce supercharged and intercooled
It's not slipping at all. I have a diesel truck with the stock trans back in that makes 1200+ft/lbs of torque and I know what slipping is. This is a computer related problem and the extra power just makes it happen a lot worse. Just another hurdle to get over that's all.
MBWorld Fanatic!
Joined: Aug 2010
Posts: 2,156
Likes: 7
From: Northern Va
Dirt Scooters
You are miss understanding me. If the computer detects during a shift that it cannot complete the shift in the set times. It will pull back more on the engine. Also if you are making a lot more power than stock it will pull back more for shifts. You might be able to tune it out by increasing the shift pressures to complete the shifts faster or in combination of reducing the torque reduction during shifts. You do not want to remove all the torque reduction though as this will seriously require a built transmission. I build and tune these transmissions all the time and the shifting is very complicated. Without tq reduction things need to be very precise on the clearances and pressures. It is a clutch to clutch transmission and it makes the shifts very difficult. Stock clearances almost require a fair amount of tq reduction to prevent a flair up in the shift. Especially the 3-4 shift. But regardless if you are pushing full throttle and the shift cannot be completed in time it will either hit the rev limiter or at least pull back on the motor pretty severely.
MBWorld Fanatic!
Joined: Nov 2004
Posts: 6,697
Likes: 381
2005 E55
I got the car at one point to hit the rev limiter in D going to the 2-3 shift and the next lap the car waited like .5 second to shift to 3rd.
I have not done a reset since then and I think its you car adapting and freaking out going down the track.
if the shift is to slow it will hit the rev limitor and didnt Jerry say they increased the shift point? maybe the ecu is hitting a limiter since the tcu is alowing the car to rev higher?
Super Member
Joined: Mar 2011
Posts: 502
Likes: 0
From: Porter Ranch, CA
E55, CTS-V Wagon, Duc 1098R
You are miss understanding me. If the computer detects during a shift that it cannot complete the shift in the set times. It will pull back more on the engine. Also if you are making a lot more power than stock it will pull back more for shifts. You might be able to tune it out by increasing the shift pressures to complete the shifts faster or in combination of reducing the torque reduction during shifts. You do not want to remove all the torque reduction though as this will seriously require a built transmission. I build and tune these transmissions all the time and the shifting is very complicated. Without tq reduction things need to be very precise on the clearances and pressures. It is a clutch to clutch transmission and it makes the shifts very difficult. Stock clearances almost require a fair amount of tq reduction to prevent a flair up in the shift. Especially the 3-4 shift. But regardless if you are pushing full throttle and the shift cannot be completed in time it will either hit the rev limiter or at least pull back on the motor pretty severely.
Member
Joined: Sep 2011
Posts: 143
Likes: 0
05 E55
My car does seem to reduced power in the split seconds surrounding a shift, but has never fallen on it's face or hit the rev limiter--niether when it was stock, nor with upgraded cooling, and EC ECU/TCU tunes. I am still on stock pulley. Interested to see if the warmer weather will affect it.
MBWorld Fanatic!
Joined: Jun 2010
Posts: 4,173
Likes: 7
From: Puerto Rico
2005 E55 AMG
I just got another reflash from Jerry and it feel MUUCCHHH better. It'll still do a tiny split second hesitation but it's no-where near as bad as it was before. While the hesitation was never LONG persay, it was very noticeable as if my car would lose 200whp for .5 seconds. Now it feels like loses maybe 40whp for .25 seconds. It's stupid quick now.
I'll be honest though, I think I don't want the shift any stronger ( bang, skreetch for example ) because we have to worry about our drivetrains and stressing the parts just to have a super strong shift is not really gonna make us much faster and will brake parts a lot quicker. I think that with quicker shifts ( such as those from EC's TCU ) and the amount of torque management my car has right now ( after the re-tune ) is perfect.
I'll be honest though, I think I don't want the shift any stronger ( bang, skreetch for example ) because we have to worry about our drivetrains and stressing the parts just to have a super strong shift is not really gonna make us much faster and will brake parts a lot quicker. I think that with quicker shifts ( such as those from EC's TCU ) and the amount of torque management my car has right now ( after the re-tune ) is perfect.
MBWorld Fanatic!
Joined: Dec 2005
Posts: 6,759
Likes: 96
From: NH
2012 C63 BS & 2014 E63 Estate & 2008 CLK63 BS
I just got another reflash from Jerry and it feel MUUCCHHH better. It'll still do a tiny split second hesitation but it's no-where near as bad as it was before. While the hesitation was never LONG persay, it was very noticeable as if my car would lose 200whp for .5 seconds. Now it feels like loses maybe 40whp for .25 seconds. It's stupid quick now.
I'll be honest though, I think I don't want the shift any stronger ( bang, skreetch for example ) because we have to worry about our drivetrains and stressing the parts just to have a super strong shift is not really gonna make us much faster and will brake parts a lot quicker. I think that with quicker shifts ( such as those from EC's TCU ) and the amount of torque management my car has right now ( after the re-tune ) is perfect.
I'll be honest though, I think I don't want the shift any stronger ( bang, skreetch for example ) because we have to worry about our drivetrains and stressing the parts just to have a super strong shift is not really gonna make us much faster and will brake parts a lot quicker. I think that with quicker shifts ( such as those from EC's TCU ) and the amount of torque management my car has right now ( after the re-tune ) is perfect.
