Car nosedives on 2-3 shift
Thread Starter
MBWorld Fanatic!
iTrader: (1)
Joined: Jan 2012
Posts: 2,092
Likes: 29
From: Orlando
1967 Pro Touring turbo LSX Camaro
Car nosedives on 2-3 shift
I saw a few people bring this up in e55amgrocket's "10sec" thread and didn't see the need for further hijacking so heres it's own thread.
Ive had this car two weeks and floored it from a stop for the first time today racing a 350z out of a toll booth. I instantly pulled a few car lengths on him but on the 2-3 shift felt like the car slammed into the rev limiter. It completely fell on it's face for about a half a second then came back alive and commenced the asskicking once again.
I have no way of data logging this car to see requested shift points vs rpm, and actual rpm observed vs. indicated and so on..
Is this a tuning issue? Trans hard parts issue? Both mabye as in the TCM not adjusting line pressure to compensate for worn friction material?
Ive had this car two weeks and floored it from a stop for the first time today racing a 350z out of a toll booth. I instantly pulled a few car lengths on him but on the 2-3 shift felt like the car slammed into the rev limiter. It completely fell on it's face for about a half a second then came back alive and commenced the asskicking once again.
I have no way of data logging this car to see requested shift points vs rpm, and actual rpm observed vs. indicated and so on..
Is this a tuning issue? Trans hard parts issue? Both mabye as in the TCM not adjusting line pressure to compensate for worn friction material?
Thread Starter
MBWorld Fanatic!
iTrader: (1)
Joined: Jan 2012
Posts: 2,092
Likes: 29
From: Orlando
1967 Pro Touring turbo LSX Camaro
MBWorld Fanatic!
Joined: Jul 2010
Posts: 4,921
Likes: 9
From: Streets of SoFlo
you to Hate
. My car does this also, but only at WOT. I've ran at the track in S and M. And M mode works best for me, as I have heat issues. And I shift at a certain rpm so that the car stays in peak tq. But my car is at the shop now being worked on and then all my cooling mods will be installed. Hopefully this will solve the heat issue, but we still have to fix the shifting problem. I'm getting a TCU tune and a retune from Jerry so maybe he can fix it.
MBWorld Fanatic!
Joined: Jun 2010
Posts: 4,173
Likes: 7
From: Puerto Rico
2005 E55 AMG
This is "normal" for the E55. Seems to be the engine pulling timing to allow for a softer shift. Jerry retuned my car today to see if he could eliminate the issue with no luck, my car still does it. Let's see what comes out of this.
Super Member
Joined: Mar 2011
Posts: 502
Likes: 0
From: Porter Ranch, CA
E55, CTS-V Wagon, Duc 1098R
On mine the logs show that it isn't pulling timing but closing the TB. I'll send Jerry some of my logs.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
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
Senior Member
Joined: Jul 2006
Posts: 469
Likes: 11
From: Santa Clara, CA
2016 CLS63S AMG, 2017 GMC Sierra Denali Ultimate, 2019 KTM 1290 Super Adventure R
That's what it feels like to me as well, as if the ECU was pulling timing on the 2-3 shift but it never did this before the ECU and TCU tune. I'm in S mode with the shifter in D (no manual shifting) and it does this at WOT near redline. Very annoying, we need to get to the bottom of it.
Super Member
Joined: Dec 2009
Posts: 848
Likes: 6
From: New Cumberland, PA
ML63
Mine never did this before the TCU tune.
I thought my car was hitting the rev limiter and that's what I was describing to the guys at E.C. but I see now that it is something different.
I didn't notice it at first because I rarely go full throttle. <---- I know those words bring back bad memories. LOL..
I thought my car was hitting the rev limiter and that's what I was describing to the guys at E.C. but I see now that it is something different.
I didn't notice it at first because I rarely go full throttle. <---- I know those words bring back bad memories. LOL..
Last edited by Roverron; Feb 21, 2012 at 05:56 AM.
Super Member
Joined: Mar 2011
Posts: 502
Likes: 0
From: Porter Ranch, CA
E55, CTS-V Wagon, Duc 1098R
Mine never did this before the TCU tune.
I thought my car was hitting the rev limiter and that's what I was describing to the guys at E.C. but I see now that it is something different.
I didn't notice it at first because I rarely go full throttle. <---- I know those words bring back bad memories. LOL..
I thought my car was hitting the rev limiter and that's what I was describing to the guys at E.C. but I see now that it is something different.
I didn't notice it at first because I rarely go full throttle. <---- I know those words bring back bad memories. LOL..
MBWorld Fanatic!
Joined: Jul 2009
Posts: 1,196
Likes: 1
From: SoCal
2013 E63 AMG
I had this same issue at the drag strip this past weekend and posted a similar thread on the c63 forum.
https://mbworld.org/forums/c63-amg-w...rag-strip.html
https://mbworld.org/forums/c63-amg-w...rag-strip.html
MBWorld Fanatic!
Joined: Jun 2010
Posts: 4,173
Likes: 7
From: Puerto Rico
2005 E55 AMG
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,239
Likes: 17
From: West
E55 AMG
Super Member
Joined: Jul 2011
Posts: 503
Likes: 0
2010 E350, 2011 ML350, 2003 996TT
Yep...me too. I thought my shift point was just higher than the engine redline, but it appears it's something else. Hopefully Jerry will have this all figured out soon so I can get it fixed while he does my retune to scale my injectors.
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
mine does this too and i only have headers and EC tune... the first time it happened i thought i blew the tranny lol but then it found the next gear and i changed my underwear
MBWorld Fanatic!
Joined: Nov 2004
Posts: 6,697
Likes: 383
2005 E55
Its to cold out for me to even go 40% throttle in secind gear ti even try to replicate it but i have felt this before and it did it right after i did the sneaky reset at the track.but back then i was on a different tune and i cant remember if its done it at all lately.
Ill let u know as soon as it gets warm out but from memory running my times the car shifted smooth going into 3rd at wot.
The only problem i get with my car is the tc is very sensetive to tire sizes.like when i ran a little taller tire out back the light would blink even if i had full traction
Ill let u know as soon as it gets warm out but from memory running my times the car shifted smooth going into 3rd at wot.
The only problem i get with my car is the tc is very sensetive to tire sizes.like when i ran a little taller tire out back the light would blink even if i had full traction
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
it is not from the TCU tune- it happens on all e55s... mine does it and i have no TCU tune as well as other members without TCU tunes reporting the same thing
Super Member
Joined: Mar 2011
Posts: 502
Likes: 0
From: Porter Ranch, CA
E55, CTS-V Wagon, Duc 1098R
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.
