Yachtcare, I currently have the Heavy Duty 3 speed. It's short and stumpy so I need to cut down my drive shaft to fit the new OverDrive tranny. It does look like I will need a new yoke for the new tranny, but I have a few lying around and might not be a problem. LONGBOX55, could you measure the front half of your drive shaft, from tranny to carrier bearing, and tell me what you come up with? That would be a HUGE help! Thanks for the info so far fella's.