66rfe valve body

[2012RAM1500RT]

Sonnax CHR145 and Grey Connector Solenoid? This is what I went through on my 65RFE, It may possibly help in some way.​

 

[Jack615]

This is what I found from sonnax

https://d2q1ebiag300ih.cloudfront.net/uploads/part/4451/44836A_B-IN.pdf?v=1683557353100

 

[mjcooper]

Just put chr146 in my ram 6.4 at 86k miles. I always had a hard shift 1-2 since it was new. Also, the occasional slippage going up steep incline in like 2nd. I need the truck to last me another 3-5 years so went ahead and did this upgrade as more of a preventative measure. Followed the instructions closely and added the proper springs, ended up having no issues doing this in the driveway at my house. I’ve only put a few hundred miles on it since but so far, every shift is smooth as can be. Might update this after a few hundred more and getting some towing in but I am pleased with results. Not sure i would trust this as fix if I had major issues already though. Also, this is my 3rd trans fluid/filter change and hardly anything on the magnet in the pan.

Just an fyi, I ran the relearn twice after bringing up to operating temperature and switching back and forth drive/neutral reverse. I didn’t trust calibration on first go around because I assume it would be bad data if all the orifaces/accumulators weren’t completely purged of air.

Hopefully this info helps someone