I decided to change my transmission fluid tonight, but it seems to be taking more fluid than both Tremec and Ford say. The TR-3650 service manual and my car's owner's manual both say that it holds 3.8L (4.0 Qts). I bought 5 just in case. As of now, I have about 4.5 quarts of Mobil 1 synthetic ATF in it so far, but it's still not up to the bottom of the fill hole. The car is on jackstands at all 4 corners and is level (I even measured front and rear - I'm a perfectionist when it comes to my car ). I really don't want to overfill it, so is this normal? How much does everyone else's tranny hold? Please help, my poor car hasn't been driven in like a week . Thanks.