I had some bad luck with a 256 a couple of years ago. I bought it at auction, and it had bearings, gears and shafts out of it. I bought all new parts from ford and restacked the gear box. I even put a grease fitting in the gear box, like it should have in the first place. I went out to rake and by the time I had reached the hay field, the rake had stopped working. It turns out that the new shaft/gear assembly from ford was defective! There were two high spots on the shaft 180 degrees apart , about 1/8" contact- the gear walked off the shaft. So I cleaned it up, mig welded the gear to the shaft and re-assembled. To get the hay raked in time, I used the old New idea 5 bar rake that has a belt drive. The New Idea is much more dependable than the Ford.