Hey Frank, has it shifted hard since you bought it? If so I'm thinking that when the reman was installed, they probably put a shift kit in it, and the trans is doing exactly what it is supposed to do. If the shift is soft, it is slipping into gear. When it is harder, the trans is not slipping, therefor less heat build up, less wear etc. Lots of guys want to put in the kits to make it shift harder. A good shop, or someone who knows the 4r100 will be able to tell with the pan off. Hope that helps Frank.
Gord.