I have a good idea for a stock one , but lack capital to see it through , but it would of involved a new tailhousing kinda like a locking hub internally ( look at the internal part and how the inside turns with the axle and the body stays with the hub and rotor ) , on the end where it bolted over output and the flange inside tailhousing turned with the shaft while tailhousing stayed stationary , wouldn't shorten it at all , but it would be easy for someone with manufacturing facilities to make I'm sure . And make the flanged part same as front so CV's are easy as buying a front shaft and borrowing parts /forums/images/graemlins/thinking.gif