Can I use a second bottle of Trans Tune for a dirty and heavily neglected transmission? I did a filter and fluid change, added a first bottle of Trans Tune and it started to downshift better. Erratic shifting is 70% gone at 100 miles driven. Or should I flush again and use one bottle of Trans Tune. Tranny has a 9qt oil capacity. Out of 3 other products I tried, yours works… Saved me big $$ bucks on rebuilding… Thank you Sea Foam!!!