I currently have my manual tranny filled with syncromesh fluid ... the fluid have been there for about 5k miles .. I planned to change it next spring when pulling the car from storage. Learning about ARX, I would like to use a dose in the used fluid, run it like 1k miles next spring and then change with all new syncromesh to make sure my tranny is clean... I dont have any issue with the tranny ...could that be done? or do I need to do the treatment with all new-fluid from the start.