the trx is great in the revo I can pull wheelies with it most of the time you have to sink alot of money into the tz to be able to use it in the revo so I have heard. You have to get an os 18tm crank, back plate and grind some fins off the crank case. I have aluminum rear hubs and steering nuckles on my mt2 thats all I think im going to use from now on. I had everything aluminum at one time but its all bent up now.