I did it for the top speed, we are doing desert racing. When I pulled it apart there was a second reason I liked it, the dog ring engagement is twice as thick as the teryx because its only high gear not a high and a low. I have hundreds of desert miles on mine without any issues. I have attached an exploded view of the vforce gear set and their part numbers, you'll need everything except the big shaft that goes out to the driven clutch, thats specific to the quad, you'll use your teryx shaft. You will also need the vforce gear that sits inside the dipstick tube cover (sorry don't know the name) its also specific to the vforce, its the gear that connects the tranny gears to the bevel gears (ring and pinion as most of us know it). The only thing I noticed when assembling the gearstack was the gear alignment was off between the primary and the secondary shaft inside the tranny, I took 2 thrust washers and had them surface ground and assembled one on each end so that I had maximum tooth engagement of the gears. If you take one apart and then assemble the Vforce gears its easy to see what you need to do. I beleive any Vforce from 04-09 would work as a reference.