66RFE valve body replacement. Is PCM flash necessary?

[Bill Erb]

My vehicle is a 2018 ram 2500 HEMI. The truck goes into limp mode intermittently; once after driving 3 hours on the interstate without stopping, once when pulling a heavy load in town traffic, once when hitting passing gear, etc. It also has hard shifts intermittently. It finally threw error code P0871 which points at the valve body. I am having my valve body replaced by a local repair shop using a SONNAX valve body. The question I have is; will the PCM need programmed/flashed after the replacement? If you've experienced this, please give me any advice that you think is pertinent.

 

[Richard Kim]

Bill,

They reflashed by 66RFE (I have a 2016 Hemi 2500) after they replaced the solenoid pack under recall. They also reflashed after transmission service (fluid / filters). Most likely yes.

 

[18CrewDually]

For a valvebody replacement all is needed is memory cleared and a Relearn will have to be performed. It's not a "flash" but instead it's a procedure for the TCM so it can readjust to the new parts. You can use a good scanner or ALFAOBD to do a Quicklearn . It's under "Transmission ".

 

[Bill Erb]

Thank you Richard and 18crewdually. I an not replacing the solenoid pack, just the valve body. I will reinstall same solenoid pack on rebuild valve body. I'm not familiar with clearing memory or relearn procedures. What I don't want to do is clear memory that will require a flash/reprogram..