I recently had a r151f tranny shipped to me and it is stuck in reverse. The shifter however is in the neutral position and won't go into any gears. I know that it is in gear because when I spin the input shaft the output spins the opposite direction. Could something have happened from shipping? How do I fix it?

 

well, i found the answer on the marlin forum, pull the backup light sensor and shift it into reverse through that hole, if anyone was curious. sorry about the post.