FINALLY fixed the common TRANSMISSION rough up/down shifting in W222!!!!!!!
"Good morning. Sorry for the delay. Below is what my shop foreman responded back to me on the email, you had sent.
What this document does not show you is the history that we have encountered while performing this forced adaptation . I have performed many of these “forced adaptations” and most of the time the adaptations are unsuccessful in that the adaptations do not improve and you actually wind up with more undesirable numbers than you started with. The transmission engineer for the USA is Sergio Akusha. I have worked together with him on multiple PTSS cases for this exact issue . We have replaced transmissions, flashed software, removed and replaced transmission internal transmission components, replaced ME modules, all without improving this condition. The issue is not transmission related but the torque calculation between the engine control module and the information that it provides to the transmission to perform the best shift for ambient conditions. This statement is known by Cory Sarver , Sergio, Germany as well as others that have fought this issue along with much finger pointing back and forth between German transmission vs engine engineers that each say that it is the others problem. The latest information is … Germany has developed the software to correct this condition however it has not been certified for application, this is more than likely due to emissions certification. It is very easy to copy / paste / highlight / and comment on technical issues in an email with limited information however there is much more to this than meets the eye. I have reviewed the shift adaptation values for this vehicle that were retrieved on 1-6-2020 and the adaptation values for shift member B-2 are as follows: 11.5, 12.0 and 6.0. These three numbers represent low, moderate and high temperature ranges. These adaptation numbers are a typical for this shift member and actually not as high as usually seen. The low value of 11.5 is actually good comparatively speaking regarding other like models. If this client insists that we do a “forced“ adaptation the results are typically that the 11.5 value will trend to 15.0 – 17.0. This is a very undesirable outcome resulting in a more harsh shift than was present before and cannot be adapted back to the lower number!
I do not recommend this procedure. I have reviewed the LI document on this subject this morning and the cause is still listed as “uncertain” with no remedy listed. "
Regards
"Good morning. Sorry for the delay. Below is what my shop foreman responded back to me on the email, you had sent.
What this document does not show you is the history that we have encountered while performing this forced adaptation . I have performed many of these “forced adaptations” and most of the time the adaptations are unsuccessful in that the adaptations do not improve and you actually wind up with more undesirable numbers than you started with. The transmission engineer for the USA is Sergio Akusha. I have worked together with him on multiple PTSS cases for this exact issue . We have replaced transmissions, flashed software, removed and replaced transmission internal transmission components, replaced ME modules, all without improving this condition. The issue is not transmission related but the torque calculation between the engine control module and the information that it provides to the transmission to perform the best shift for ambient conditions. This statement is known by Cory Sarver , Sergio, Germany as well as others that have fought this issue along with much finger pointing back and forth between German transmission vs engine engineers that each say that it is the others problem. The latest information is … Germany has developed the software to correct this condition however it has not been certified for application, this is more than likely due to emissions certification. It is very easy to copy / paste / highlight / and comment on technical issues in an email with limited information however there is much more to this than meets the eye. I have reviewed the shift adaptation values for this vehicle that were retrieved on 1-6-2020 and the adaptation values for shift member B-2 are as follows: 11.5, 12.0 and 6.0. These three numbers represent low, moderate and high temperature ranges. These adaptation numbers are a typical for this shift member and actually not as high as usually seen. The low value of 11.5 is actually good comparatively speaking regarding other like models. If this client insists that we do a “forced“ adaptation the results are typically that the 11.5 value will trend to 15.0 – 17.0. This is a very undesirable outcome resulting in a more harsh shift than was present before and cannot be adapted back to the lower number!
I do not recommend this procedure. I have reviewed the LI document on this subject this morning and the cause is still listed as “uncertain” with no remedy listed. "
Regards




"Good morning. Sorry for the delay. Below is what my shop foreman responded back to me on the email, you had sent.
What this document does not show you is the history that we have encountered while performing this forced adaptation . I have performed many of these “forced adaptations” and most of the time the adaptations are unsuccessful in that the adaptations do not improve and you actually wind up with more undesirable numbers than you started with. The transmission engineer for the USA is Sergio Akusha. I have worked together with him on multiple PTSS cases for this exact issue . We have replaced transmissions, flashed software, removed and replaced transmission internal transmission components, replaced ME modules, all without improving this condition. The issue is not transmission related but the torque calculation between the engine control module and the information that it provides to the transmission to perform the best shift for ambient conditions. This statement is known by Cory Sarver , Sergio, Germany as well as others that have fought this issue along with much finger pointing back and forth between German transmission vs engine engineers that each say that it is the others problem. The latest information is … Germany has developed the software to correct this condition however it has not been certified for application, this is more than likely due to emissions certification. It is very easy to copy / paste / highlight / and comment on technical issues in an email with limited information however there is much more to this than meets the eye. I have reviewed the shift adaptation values for this vehicle that were retrieved on 1-6-2020 and the adaptation values for shift member B-2 are as follows: 11.5, 12.0 and 6.0. These three numbers represent low, moderate and high temperature ranges. These adaptation numbers are a typical for this shift member and actually not as high as usually seen. The low value of 11.5 is actually good comparatively speaking regarding other like models. If this client insists that we do a “forced“ adaptation the results are typically that the 11.5 value will trend to 15.0 – 17.0. This is a very undesirable outcome resulting in a more harsh shift than was present before and cannot be adapted back to the lower number!
I do not recommend this procedure. I have reviewed the LI document on this subject this morning and the cause is still listed as “uncertain” with no remedy listed. "
Regards
You all might think this strange I find this kind of response somewhat comforting in that there is complete and forthright discussion of the problem and communication with the transmission engineering staff. It makes sense that they can't just roll out a software upgrade due to emissions certification requirements.
Additionally it echos what my indy has told me when I inquired regarding having the transmission shift quality improved via road test adaptations.
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They did say the technician spent most of the day on the line with someone doing tests and troubleshooting. I"m not sure what they were seeing because the rough shift only happened when the car was cold and was only bad on really cold mornings. It's been kinda warm lately. Maybe there is some history in there of shifts?
But in a repair situation, who would know the difference? When an ODB-II car is inspected annually for "emissions", all that's actually checked is that specific factory-equipped components (e.g. catalysts) are present and have no stored error codes. So a small change to transmission shift parameters couldn't possibly make a car fail in that context.
But in a repair situation, who would know the difference? When an ODB-II car is inspected annually for "emissions", all that's actually checked is that specific factory-equipped components (e.g. catalysts) are present and have no stored error codes. So a small change to transmission shift parameters couldn't possibly make a car fail in that context.








thanks..














