I've had three different transmissions in my 300SD now so I feel like I had a good breath of shifting problems. Transmission with 75K on it should be good. I am assuming that after all the work you did on it there was no change in how it shifts?
Assuming you played around with the shift cable tension?
I have not experienced with the valve body kit you are speaking of though I messed around with swapping out valve bodies on one of my transmissions.
Does the shift quality in those two shifts points change when you change the acceleration - slow or fast? I think that you definitely can have smooth shifting at all points with this car. (I almost do).
It it good to remember that for the transmission to shifts properly the engine has to be working properly. If you have engine performance issues, you will have shifting issues. It is all design to work in a delicate balance. I had a ALDA line that would come off resulting in no turbo. Every time that happened I would experience it as a transmission shift issue because it started shifting different. So a rough shift can be the results of not enough horsepower but the transmission is fine.
Sounds like you know what you are doing so you could try the valve body kit and see what happens though I think it is just a shot in the dark.
This book was helpful for me though I started without much car mechanic experience:
https://mercedessource.com/store/di...n-peak-performance-tuning-manual-kent-bergsma
Good luck!
Bill
Assuming you played around with the shift cable tension?
I have not experienced with the valve body kit you are speaking of though I messed around with swapping out valve bodies on one of my transmissions.
Does the shift quality in those two shifts points change when you change the acceleration - slow or fast? I think that you definitely can have smooth shifting at all points with this car. (I almost do).
It it good to remember that for the transmission to shifts properly the engine has to be working properly. If you have engine performance issues, you will have shifting issues. It is all design to work in a delicate balance. I had a ALDA line that would come off resulting in no turbo. Every time that happened I would experience it as a transmission shift issue because it started shifting different. So a rough shift can be the results of not enough horsepower but the transmission is fine.
Sounds like you know what you are doing so you could try the valve body kit and see what happens though I think it is just a shot in the dark.
This book was helpful for me though I started without much car mechanic experience:
https://mercedessource.com/store/di...n-peak-performance-tuning-manual-kent-bergsma
Good luck!
Bill
