i had a similiar problem. i dropped my genesis off at debbies rc world and had them look at it. he adjusted the gearing and still couldnt get it to shift into third. i brought the monster home and ran it and it hit third..i will say one thing, the transition from 1st to 2nd gear is very loud and noticable, from 2nd to 3rd is not. you can just hear the engines rpm drop and it continue to grab speed.. just gotta listen very closely, specially with stock muffler. hope this helps out.