transmission ??? 2000 grand prix 3800
After I drive longer distances 70 + miles sometimes I lose overdrive.
When I check the fluid at that time ideling ,hot, and in park the fluid seems above the full line with some bubbles in it. I does not feel hot or smell bad.
I am wondering if it is maybe overfilled a 1/2 quart or so and that when expands it messes up some line pressures or something. or is it a sign of it going bad?
It has 130,000 on it and I changed the fluid and filter at 110,000 when i bought it. not sure of previous maint.
when it is cold it runs normal, even when it will not shift into overdrive it still shifts smooth in the first 3 gears.