I dropped the trans pan (as well as replaced both filters) and let it drain for around 1.5 days because I was waiting for O'Reilly to get a new pan shipped as it was dented and gasket was leaking. I don't know how much fluid I drained but I'm already up to 9 quarts of trans fluid that I've put in.

Procedure I do when checking. Drive it around for around 10 minutes, cycle through park neutral and drive then put it in park and check.

I've added 9 quarts and still on the half way mark between cold and hot.. Should I keep adding?

 

not sure what tranny you have ,but, i put 12 quarts in my 46re after dropping the valve body..

 

Drive for an hour or so to get trans up to temp... suppose to be at 180 degrees when checking fluid level. Cold tranny will show a lower level..... as trans warms the level on stick will rise accordingly.
Going on memory pretty sure I put 9 1/4 into my 4X4..... 2 wheel drive has smaller pan so less fluid is needed. ALWAYS never over fill...... slightly under filled is better than overfill.

 

no idea which trans you got...shouldn't you be checking the fluid level in neutral?

 

545RFE... Check in Park

 

says check in park in the service manual but the dipstick says idle in neutral...unless someone changed out the dipstick on my 2007 dh 2500 with 545rfe