terrymargate

I am told the valve body/TCU are locked to the VIN on my 2011 S550

I think that I have a problem with my valve body (some gunk stuck in causing unsmooth shifts)

I am going to try to clean it, but if something goes wrong or it does not work, I do have another transmission sitting here.

Would it be possible to use the mechanical valve body from the new transmission but use the conductor plate/tcu (electronics) from my original transmission? This will save getting the new transmission recoded, in fact to save swapping transmissions, If I can just use the new valve body and original TCU electronics, I can do the job without removing the transmission from the vehicle

am still hoping the clean the original valve body, then will have a decent transmission for sale :-), but nice to have a fallback plan in case it goes pear shaped

Grizz1

Yes, if the issue is just the valve body, you can replace just that and transfer the conductor plate.

rogersdba

Good lucky. I just went thru the same process. In the end I had to purchase a rebuilt transmission. My extend warranty would only cover a used/rebuilt trans. Trust me I was pissed.