After accidentally draining out approx 4 quarts of atf (as it came from the factory), the tranny only wanted about 2 1/2 - 3/4 quarts back - a net loss of 1.25 - 1.5 quarts.

I did the sealed tranny check/fill procedure carefully and do wonder if the factory is slightly overfilling.

Maybe +/- 1 quart isn't that serious on this tranny? I always thought it needed to be pretty exact. Otherwise, I made an error somewhere but can't see where unless the AT temp sensor isn't accurate or I wasn't exactly level, perhaps.

07 4Runner V8 4WD

 

how good is your measurment on what you accidentally drained?

If it was on the floor and you are guessing vs captured and measured is a big difference.

But I am coming at it from a lack of tranny knowledge thats for sure, just wondering if you are overestimating your loss.

 

I caught the atf in an empty oil pan and then poured the fluid into one-quart oil containers which were empty. I measured it that way at the 800 ml points. After posting around it seems that a lot of people with the A750F have had this same experience.

I dunno.