Sir-Boost-a-Lot

iTrader: (1)

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?

Shifter

What drive mode were you in? Manually shifting?

Denroll

We need to get to the bottom of this. Next time I go to the track, I'm going to try shifting in M mode with the foot planted to the floor.

Sir-Boost-a-Lot

iTrader: (1)

Just plain old "D". Does the manual mode even do anything? In my 335 it was aways a tenth or two quicker if you left it the **** alone.

RedBullJnky

I agree. . 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.

GT-ER

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.

adianaty

On mine the logs show that it isn't pulling timing but closing the TB. I'll send Jerry some of my logs.

GT-ER

That could be it as well.

mrweelr

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.

Roverron

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..

audibiturbo

Same issue for my cls55, car makes 510whp, with camshaft.
really wanna fix.

adianaty

Same here. Never had a problem until TCU tune was installed.

Evolved8

Same issue here mods as followed in my sig. Track use at WOT does it every time

xtyper

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

audibiturbo

In my case it happened 3-4 and 4-5 shift feel like TB closed

KLR CLS

Happens for me too...Jerry will fix it..I am sure.

skratch77

Try turning off traction control and see if it does it.

GT-ER

I tried with both way and it does it the same. In C is does it way worse than in S but it does it.

jmb614

https://mbworld.org/forums/5065021-post62.html

BlkE55K

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.

gaspam

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

skratch77

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

cij911

Big bummer as I just bought the ECU and TCU tune....The TCU tune has been out for a long time, so why is this just being reported now ?

gaspam

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

adianaty

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.