I just done a total cleaning of my tranny and put in a heavier grease!!!
I got the idea to go out to the garage and use the air compresser with the air blower attachment,,,, it works great to get out the old grease and clean the grim out of the gear teeth!!!! Also its strong enough to blow caked on grease off your tranny case..!!!
If ya got accesss to one its awsome,, but hold on to the gears good while cleaning them or youll lose them for sure.... Also great for all around cleaning!!