I had AAMCO do some work on my transmission (yeah, I know) in my 2000 Dakota.

My new local transmission guy is convinced they did NOT replace the solenoid/valve body they charged me for.

Does anyone know how to find a manufacture date based on serial number/markings for this type of part (assuming it's a MOPAR part for a 45RFE) ?

Maybe a link or website or phone number ?
Thanks !