I hope this hasn't already been covered before....

I have an 85 d 100 with a 225/6 and a 3 speed torqueflight. generally all is well, that is, until i have to shift into reverse. it will unfailingly stall, unless i keep the rpms up. this will happen every time, regardless of air temp, whether the truck has been warmed up or not, driven hard, or not... is there something i could do, short of pushing this truck into the river....