Help!
Thread Starter
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Joined: Mar 2024
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S63
Help!
I hate to join and post under these circumstances (problems) but here goes.
I bought a 2014 S63 with 30k miles a few months ago. Everything is great but it had (has) a small issue. In certain, specific circumstances, it seems like the trans wants to shift, where there is a rhythmic surge... It doesn't do it all the time, only at around 30 percent throttle and normally only after aggressive driving, when it's warm (according to AMG screen for trans temp)...
So I put my foxwell scanner on it early on and saw it had an ISM fault. I did not record the number at the time, I cleared it, and it has been away since then. It has not come back.
So I did a trans service, filter fluid and the rest.
Now, on hard acceleration (full throttle) sometimes, there is a violent vibration between 1st and 2nd gear, right at the shift. It very rarely does it in sport mode, but nearly always in comfort.
Then, I got a code P07230 output shaft rpm sensor - which makes sense! Alas, I cleared it and it has not come back, the vibration continues.
At first I thought maybe I got fluid in a connector, so I took it back apart and thoroughly cleaned the connectors with electrical contact spray. I put it together and it seems a little better, but I can still get it to do it. Again neither the ISM code nor the output rpm sensor code have come back.
I have reset the adaptations and every thing that came up on the quick scan which was nothing to do with the drive line...
I'm down to thinking the trans needs a factory program/tune or the torque converter is messing up or trying to lock inappropriately. But this vibration is violent...
All regular mechanical things were thoroughly checked, like mounts and such.
Thanks for any help!
I bought a 2014 S63 with 30k miles a few months ago. Everything is great but it had (has) a small issue. In certain, specific circumstances, it seems like the trans wants to shift, where there is a rhythmic surge... It doesn't do it all the time, only at around 30 percent throttle and normally only after aggressive driving, when it's warm (according to AMG screen for trans temp)...
So I put my foxwell scanner on it early on and saw it had an ISM fault. I did not record the number at the time, I cleared it, and it has been away since then. It has not come back.
So I did a trans service, filter fluid and the rest.
Now, on hard acceleration (full throttle) sometimes, there is a violent vibration between 1st and 2nd gear, right at the shift. It very rarely does it in sport mode, but nearly always in comfort.
Then, I got a code P07230 output shaft rpm sensor - which makes sense! Alas, I cleared it and it has not come back, the vibration continues.
At first I thought maybe I got fluid in a connector, so I took it back apart and thoroughly cleaned the connectors with electrical contact spray. I put it together and it seems a little better, but I can still get it to do it. Again neither the ISM code nor the output rpm sensor code have come back.
I have reset the adaptations and every thing that came up on the quick scan which was nothing to do with the drive line...
I'm down to thinking the trans needs a factory program/tune or the torque converter is messing up or trying to lock inappropriately. But this vibration is violent...
All regular mechanical things were thoroughly checked, like mounts and such.
Thanks for any help!
Super Member
Joined: May 2011
Posts: 975
Likes: 270
From: Fort Worth TX
2020 S560, 2014 SLK55 (Prev. 2016 S65, 2013 SLK350, 2008 CLS63, 2006 E350, 2006 CLS500, 2005 C230K)
More likely that a sensor is on it's way out, check actual values.
Remember a fault only sets when the signal is completely implausible or out of range.
Remember a fault only sets when the signal is completely implausible or out of range.
Senior Member
Joined: Apr 2023
Posts: 480
Likes: 305
2014 S63 2010 ML350 Bluetec 2009 SL550
You have the MCT which does not have a torque converter. It uses a dual plate wet clutch (think motorcycle) and it sounds like something is terribly wrong in there.
I'd leave this one to a pro personally as that is not a cheap transmission to replace ....
I'd leave this one to a pro personally as that is not a cheap transmission to replace ....
MBWorld Fanatic!
Joined: Aug 2007
Posts: 1,843
Likes: 797
From: Pacific Northwest
2001 S600 V12 Sold, 2011 Jaguar XFR Sold, 2017 S550 4-Matic, 2018 S63 AMG Sedan
The pre 2014 S63 DOES have a torque converter. The MCT wet clutch began in 2018 for the S63, I think they were put into E63 a couple years earlier, but not until 2018 for the S63.
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Joined: Oct 2002
Posts: 4,976
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From: Cincinnati
2010 E350 4Matic
Assuming that you meant the pre 2018 (Pre 2014 wouldn't make sense here), I think that it is the other way around ie the pre 2018 have a MCT transmission and the 2018 and later have a torque converter.
Last edited by MBNUT1; Mar 15, 2024 at 09:21 AM.
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Joined: Nov 2015
Posts: 1,692
Likes: 826
From: Newcastle, WA
2019 S63 4Matic+, 2018 E400 Cabrio, wardens car.
2014 to 2017 S63's have the 7 speed auto with traditional torque converter. In 2018 they moved to a new MCT 9 Speed transmission with no torque converter.
MBWorld Fanatic!
Joined: Oct 2002
Posts: 4,976
Likes: 1,345
From: Cincinnati
2010 E350 4Matic
I stand corrected on the 2018 plus years, misread some articles when they said that the 2018 9 spd with MCT was as smooth as a torque converter unlike the sometimes jerky prior 7 spd with MCT. Which is to say the 2014 -2017's S63 have a MCT
https://media.mbusa.com/releases/rel...3-amg-4matic-1
https://www.mbusa.com/en/amg/performance/transmissions
https://media.mbusa.com/releases/rel...3-amg-4matic-1
https://www.mbusa.com/en/amg/performance/transmissions
Last edited by MBNUT1; Mar 15, 2024 at 11:17 AM.
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Thread Starter
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S63
What do yous think are the odds that this is wheel hop - hear me out.
I drove it today and got it to do it twice. First time, I noticed that the vibration happens a few beats before the shift. The second time, I induced it up my driveway, which is still asphalt, and sure enough it was significantly before the shift. Also, I felt the fall off of traction control kicking in (I think).
My GLI would do the same thing on a clutch dump, but at a lower frequency. With this issue seemingly moving around the RPM band, I am leaning toward believing that my fluid change has tightened up the shifts to the point that the tires are trying to break loose and the traction control interferes. I have Michelin pilot sports on it, and a long with it being 4matic makes me think that yes, at or near the peak HP the tires want to let go.
I have not tried it with the suspension in sport, as I've only thought to do that today after getting home. I will go out later and see if a former suspension will make a difference.
What are your thoughts?
I drove it today and got it to do it twice. First time, I noticed that the vibration happens a few beats before the shift. The second time, I induced it up my driveway, which is still asphalt, and sure enough it was significantly before the shift. Also, I felt the fall off of traction control kicking in (I think).
My GLI would do the same thing on a clutch dump, but at a lower frequency. With this issue seemingly moving around the RPM band, I am leaning toward believing that my fluid change has tightened up the shifts to the point that the tires are trying to break loose and the traction control interferes. I have Michelin pilot sports on it, and a long with it being 4matic makes me think that yes, at or near the peak HP the tires want to let go.
I have not tried it with the suspension in sport, as I've only thought to do that today after getting home. I will go out later and see if a former suspension will make a difference.
What are your thoughts?
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