th-350 tailshaft

hey guys got a question with my tranny. recently i wave noticed a clicking sound when ever i coast(got a loud exhaust so i cant hear when im moving) and for the life of me i cant ficure it out. today i pulled my driveshaft and a lot of tranny fliud came out. befor i puled it i tested my u-joints but it seemed to move slightly on the slip yoke. when i pulled it there was play in the tailshaft splines. what is in there that could malfunction?

intermediat sprag gear works kinda like a rachet only turns one way. maybe its wore but hard to tell with your description.

My sprag gear use to do that , till one dat I jumped on it. It confirmed it when it broke. :eek: