200R4 update
Okay, I took it on the highway. My vibration at 60 mph and higher is gone. I always thought it was the rear end, but after the fan broke I wondered if it was the fan out of balance. Now with a new fan it is smooth as silk. At 55 mph it runs at 2200 rpm and at 72 mph it was just below 3000 rpm. Before, with the 904 tranny, it was 3200 at 55 and 4000 at 70. I am much happier. I came off the highway, rolled around the corner and got to 30 mph in second and hit it. The tires broke loose and started to fishtail just a bit. Holy **** this thing is fast!