First timer here. Performed my 50 hr maintenance on my L3800 HST. Decided to also change the trans oil. On refilling, manual says it will take 6.2 gallons. I've gone over that amount and cannot see the full "line" in the little window. I put a little more in and still cannot see the "line". In fact, it does not appear as if any trans oil is showing up in the little window. I think I've put in so much that I've filled up the window completely. That, plus the new trans oil is so clean it is hard to detect that it is there. Thoughts? Has anyone else run into this issue? Sure wish I had a dipstick in lieu of the little window. Maybe I'm the dipstick but I would appreciate your comments. I hate to just drain it back to 6.2 gallons and assume I'm safe without seeing that it is full in the little window. Thank you for any advice.