Ok had the trans sitting on the floor for 10 years or so went through it new seals and sealing rings clutches all good this came out of a everyday driver and I know it all worked when last in and now no reverse!! I air checked everything before put in everything work and held!! Also new vac mod valve good vac to it brand new clean fluid new converter what am I missing?!! All valves in valve body seemed free but didn't go through that is that a possible prob?!! Any help would be good!! Thanks