I did front diff and transmission fluid pan drop and filter change today . 2 qt for front diff and almost 9 qt for transmission . Most peoples say it took 7.5 qt for pan drop and filter change on the 6r80 Ford transmission . Idk I over fill it not .
I was add 5 qt and it’s already come out the fill hole . I start up the engine and it’s empty on dip stick . I keep add half qt and shift from park to 1 . And back to part . Fan come on 2 time . And fluid level was at hot cross mart . Tight everything back up . Take it out for a drive . Drive awesome ! Went home and put in park while engine run and my dip stick level was way way above the cross mark . Did I over fill ?
anyway I use 2 jug of Valvoline Max life . Even though Ford not approve or Licence .Mercon LV . I do trust valvoline max life . I been use it for ever in many different vehicles for not to trust it
Anyway the front diff . I was using a bottle pump . Fluid come out white milky and thick . I was gonna replace with cheap super tech 80-90 and flush it . But I end up using valvoline full synthetic 75w90 .
look like the atf filter never been change . Still have Ford original number
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