Correcting Speedo after Wheel change.

Well I took it out and drove it today, and it looks like Im indicating 43mph @60mph on the GPS. Im going to get it up on a rack monday after work and remove the speedo gear and apply the .72 multiplier to get the correct gear. Thank you very much for the help, that was a great idea.

As for the speedo noise, Im pretty sure its a speedometer clock problem. Hopefully someone has a good one laying around.