Shifting
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2004 CLK 500
Shifting
Hey guys my new valve body has definitely made the tranny shift nicer but I've noticed it still acts weird if you give it a little more than normal throttle off the line. I am always in sport so too, but when you give it more than just light throttle from a stop it starts to go and then feels like it can't make up its mind and either up or downshifts when it shouldn't be.. it's really annoying.. I'm almost wondering if it could be a speed sensor or something just very slightly off.. does anyone have any ideas by chance? Thanks!
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'06 MB S55 AMG; '04 Audi Allroad 4.2; '05 BMW M3 Conv.; '92 MB 500E
It may need to relearn your adaptations. I think 400 miles or so. Have you done the driver initiated TCU reset? Why did you need a new valve body?
I'm almost exclusively in M mode, so I've never experienced what you're describing, other than the basic computer mandated torque backoff between shifts. I think it's this factory safety that most TCU tunes mess with, resulting in so many failed transmissions in tuned cars.
maw
I'm almost exclusively in M mode, so I've never experienced what you're describing, other than the basic computer mandated torque backoff between shifts. I think it's this factory safety that most TCU tunes mess with, resulting in so many failed transmissions in tuned cars.
maw
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2004 CLK 500
The dealer did the adaptations.. I did the valve body because I could also feel the converter locking a little after it would shift.. I have felt it on my last three 220/221's also and heard it's a known issue with the valve body getting worn out in the valves.. well the new valve body solved that completely and took away 90% of this unsure of what gear it should be in when accelerating a slight bit harder than normal off the line but I can still feel it trying to do it once in a while vs almost every time before the body.. I'm thinking g60 is right though these new trannys all shift like crap from the factory trying to get MPG.. I think I may look into a tune..
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'06 MB S55 AMG; '04 Audi Allroad 4.2; '05 BMW M3 Conv.; '92 MB 500E
I got nothing. Sorry. I think it's the normal torque cutout thing. But now I'm curious and will pay attention to mine. I guess that means I need to get out of M mode... I think all factory adaptations suck because they assume no one wants to hold gear into 4K rpm in an SClass at light throttle. Bad assumption in my case, and probably for anyone buying an AMG. But since they let me opt out of those assumptions with M mode, I don't care. But we'll see. My guess is it's normal Mercedes TCU programming.
maw
maw
Last edited by maw1124; May 3, 2017 at 01:45 PM.
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2006 W220 S65 AMG
What I don't like about M mode is that it will hold 4th too long when I feel it should already be in OD, but I guess that's what the paddle nubs are for.
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2004 CLK 500
For me it's right after I hit the gas.. like as soon as I give it throttle I feel another clunk like it's shifting or maybe the converter.. the valve body solved the other issue I had but this is really annoying.. the best I could describe it would be a bad tranny mount or something and hitting the gas and having the tail clunk or driveline clunk but it's none of that and all the mounts are new.. just seems like something is either shifting or engaging when it shouldn't.. it may be the converter after all.. because I put it in m and gave it some gas and I felt it right about a second after take off.. I'll have to test more but that's what it seemed like.. maybe the converter is the culprit? I thought maybe a speed sensor or something throwing the timing off
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2004 CLK 500
I did my front flex disc the other day and the center support I didn't even think about but it's not play in the driveline.. it's like that but it's definitely the converter or trans shifting weird.. I think it's the converter trying to lock..
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2004 CLK 500
Well tonight for the first time I gave the car about 3/4 throttle which is the hardest I've ever been on it.. I had to go about 15 minutes out of town just to do that and wow let me tell you, what a ride!!
The trans is a slug though.. it reminds me of trying to race with a manual trans but shifting casually.. so rpm is roaring then sluggish shift... the sluggish shift feels just like the issue I'm having down low too.. I'm thinking I really should look into a tcu tune.. but then I'm wondering if I should go somewhere who is best and does both ecu and tcu.. who is the best for the s55?.. Thanks!!
The trans is a slug though.. it reminds me of trying to race with a manual trans but shifting casually.. so rpm is roaring then sluggish shift... the sluggish shift feels just like the issue I'm having down low too.. I'm thinking I really should look into a tcu tune.. but then I'm wondering if I should go somewhere who is best and does both ecu and tcu.. who is the best for the s55?.. Thanks!!
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2014 E63s
I would do a trans service, if you haven't already. I just had a race IQ tcu done on my S55 and it really updates the drive ability. No instant downshifts when trying to pass it will hold the gear, the driving manners are perfect, etc...! On my S65 the sluggish shifts I feel are to protect the trans and I don't really mind it, if you pull back the throttle to about 70-80 percent you can coax it shift a bit quicker up by redline.
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'06 MB S55 AMG; '04 Audi Allroad 4.2; '05 BMW M3 Conv.; '92 MB 500E
Thread Starter
Super Member
Joined: Oct 2011
Posts: 933
Likes: 25
2004 CLK 500
I would do a trans service, if you haven't already. I just had a race IQ tcu done on my S55 and it really updates the drive ability. No instant downshifts when trying to pass it will hold the gear, the driving manners are perfect, etc...! On my S65 the sluggish shifts I feel are to protect the trans and I don't really mind it, if you pull back the throttle to about 70-80 percent you can coax it shift a bit quicker up by redline.
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2004 CLK 500
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'06 MB S55 AMG; '04 Audi Allroad 4.2; '05 BMW M3 Conv.; '92 MB 500E
I don't think so. That clunk bothers me. Reading the way you drive your car, you shouldn't feel anything when the supercharger kicks in on stock components. Remember, it's supercharged, so it's always engaged. I know it has a clutch and all, but at 1/2 or 3/4 throttle, I wouldn't think you'd feel it. I certainly haven't. After almost 8 years, I'm only now starting to hear my supercharger (only with radio off) which tells me it's time to replace fluid. If you're in the thick of the power band (M Mode, like 3500rpm) and then mash it to the kick down, then you might feel the supercharger engage and chirp. But even then there should be no clunk. I'm pretty picky too, but have never experienced what you're describing. I hope it's not the TQC, but I notice people selling them. It's a new issue to me, quite honestly. I'd be looking at that, but center support bearing first.
maw
maw
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Joined: Oct 2011
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2004 CLK 500
I don't think so. That clunk bothers me. Reading the way you drive your car, you shouldn't feel anything when the supercharger kicks in on stock components. Remember, it's supercharged, so it's always engaged. I know it has a clutch and all, but at 1/2 or 3/4 throttle, I wouldn't think you'd feel it. I certainly haven't. After almost 8 years, I'm only now starting to hear my supercharger (only with radio off) which tells me it's time to replace fluid. If you're in the thick of the power band (M Mode, like 3500rpm) and then mash it to the kick down, then you might feel the supercharger engage and chirp. But even then there should be no clunk. I'm pretty picky too, but have never experienced what you're describing. I hope it's not the TQC, but I notice people selling them. It's a new issue to me, quite honestly. I'd be looking at that, but center support bearing first.
maw
maw
Thanks for the info, but it's not a clunk.. It feels like the car is shifting when it shouldn't, or the converter is locking.. I'd bet money it's the converter locking but I don't know.. I can check the center bearing but I don't think it would only do it at that one time after low gear.. It only happens when you first give it gas down low..
