Larry, not sure if you sorted it out yet. I had a similar thing on a 3 ton Hangcha forklift gearbox we rebuilt. From memory there was an idler shaft (from memory it was just a shaft with a gear either end)which we put in back to front which caused the same thing as you are having happen
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.