the trans I got out of my 89 Ram TBI 318 parts truck is it a 904 or 999?

I read where the lockup converter is electronicly controlled? is this true on a 89 truck? I read it somewhere on the internet

Because I had this trans looked at and cleaned at a transmission shop & im getting ready to put it into my 84 D150 with a 318 4BBL

Last edited by 98RAM1500; 03/19/14 11:46 PM.