Turned out to be 2nd to 3rd , changed fluid and filter , helped a while . Used some lucas trans additive .
Trans is slipping 2nd to 3rd , when you shift manually 1st to 2nd is fine , 2nd to 3rd has a sligh slip if you stay on the gas . Does not slip as bad as in Auto mode.
Can anyrhing be done , would the modulator help or is this trans on its way out ?
Thanks