re: solenoid/rpm problem

hi, this is my first post.I have the O/D off light on my camry LE 93 4 cyld dashboard with code 63. Understand this is a problem with the #2 solenoid (gear). Can someone tell me where n how to access to this solenoid. I also have problem with my car after moving from a stop, the rpm stuck at 2000-2200 for a good few seconds b4 it can slowly goes up again, having my leg on the gas pedal. Sometime the rpm gauge goes up pretty fast to 4000 rpm when I step on the gas (not sure is this a problem). Pls let me know if these problems are related or what is the cause of my problem. Hope to get some help. Thank u.