My 82 928 A/T slips when cooled. Changed fluid and filter a few weeks ago-did not help. When I first star off in the things are fine till the car shifts up. If I hold speed it's fine, but if I try to speed up even just a little it just slips. After the tranny warms up it works perfect. Any thoughts, been doing it for a while not get better or worse.>>
If the fluid level is correct, you may want to try synthetic trans fluid. My 86 auto started to shift erratically when cold and changing to Redline fixed it immediately.

Louis Ott