Plans are to acquire a shaft drive motorcycle, remove the swing arm and install a widened frame to attach a car rear end. This is to run errans, go to the feed store, ect. The one problem to overcome will be the gear ratio, motorcycles turn their shaft about 6 times to turn the rear wheel once, however automotive rear ends turn their shaft at about a 2.5 to one ratio. There needs to be some kind of transmission before the rear end to regain the torque that will be lost. I am thinking of useing some kind of auto manual trans to accomplish this needed change, any one know of anything else that will fill the bill? An auto manual trans will allow highway speeds when the engine is at an idle when in high gear, but will need to be in a lower gear for around town daily use. Suggestions?