I don't really know the specs on the one I have. It was listed as a 4 speed, but I have 5 forward gears. It included the shifter mechanism. The machanic that helped me with the changeout said " it lined up and slid in easily". It's made all the difference in the situation I'm in. I use it everyday for about 30 mi. round trip and maintain 30 mph pretty easily. I try not to go over 38 for fear of running the motor too fast. No clutch, it shifts comfortably when the rpm's line up. A little slower it seems to me without a clutch, but no problem. When I'm in a situation that's inconveniet to shift, I just take off in 3rd as a starting point, but usually I just shift normally as per rmay's advice.
