Hey guys, I know this isn't z related but I trust everyone here for advice. My dad has a 1955 ford thunderbird that has a tranny that likes to slip when in reverse (for example, going uphill).
What could cause this? Sorry its such a noob question, but I have no experience with auto trannies and would like to help him out!
Trans fluid is topped off and full in park, at idle.
Thanks - Evan