I have been told that ORileys sells a transmission conditioner that will help with shifting problems and will not swell up and damage the seals. Does any one know the name of this and has it helped with shifting? Comments and suggestions welcome. This is a 1984 300sd automatic that after the car gets hot it does not want to shift into the last gear. When it does this I have to put it in neautral and let the RPMs lower and it will shift into gear. Help Please