I have a 360 Duster with a 727 and Turbo Action reverse manual valvebody. The issue I am having is 3rd gear. First & second are great. When shifting into 3rd it won't always go into gear without playing with the throttle. Often when shifting into 3rd it acts like it pops into neutral. If it is in third and I let off the throttle and then accelerate, it also acts like it pops into neutral. Is the 2/3 band or clutches going bad?