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I replaced the Mechatronic shift solenoids in my 2006 RR HSE with the ZF 6HP26 transmission.

My first issue was a no start due to shift lever not connected to unit properly and thanks to Mark_C and RRPhil I was able to correct that, and the vehicle starts.

However, I can’t communicate with the transmission control module via my RWS software and I get the following three error messages: 1-Transmission Fault Limited Gears Only 2-Transmission Range Change Not Available 3-HDC Fault System Not Available.

I did drop the the entire Mechatronic unit about six inches and it hit the metal drip pan on the asphalt driveway fairly flat. It slipped out of my hands. There don’t appear to be any cracks or broken pieces, but I’m fairly certain it houses the ECU for the tranny.

Anyone have any ideas? The electrical harness appears good, and it did start, whereas befor it didn’t.

Anyone have a part number for the plastic electronic unit bolted to the valve body or where I can source one?
 
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