Need Information. What trans?

If you have this tranny it is a A-500 or A-518 type tranny.Other versions are the 42RH,46RH used on gas power mopar engines.These tranny started in 1989 and move forward with more mods and electronic control.Normally you would have a tag or serial number on the side of the tranny to ID the unit.This would be a 17 digit letter and number code.Take a nother look and post a pic if you can or do a search under mopar 500/518 transmissions,Mrmopartech