Actually, I do have a Garmin GPS already, and am using it currently for getting more accurate speed
. Okay, so I either need to open up my transmission and change the gears, which I don't know how to do, or I can just buy an adapter that I screw right in and it accomplishes the same thing... I think I choose buying an adapter! Now I need to save up some cash.
Thanks for all your help! Now I'm on to fixing the backup lights, and getting the dash lights to work!