The 6175 after starting will go into forward gear and shift up but once you push the clutch in to back up it will flash Error Code 46 then go into failure sensor on the post display. Then push the clutch in to clear the failure sensor then goes into 1 1R F. Then will not move forward or backward until you shut it off and restart then it may move, or it may not. It seems once you get it to go forward it will keep going forward until you push the clutch in to backup or even to resume forward motion. The error code only flashes does not stay on. Once and a will it may flash error code 53 as well and go into failure sensor mode. Tractor has 4800 hours on it.