blackdevildog.... to replace the gears you will need a snap ring plier and regular hobby tools... Take your time to make sure the gear mesh is correct, this is most likely the reason for the failure in the first place...you want to place paper between the gears to ensure the correct mesh...make sure your engine mounts are tight also... use locktite... enjoy... let us know how you make out...I ran my mt2 yesterday and everything worked great... I even jumped it off an 8 foot jump and landed on its lid... other than a broken body mount... truck drove away....... Love the mt2