ok i have an 88 bronco full size, it has 33/12.5/15 tires and has 3.55 gears, does anybody know what gear i will need to make my speedo correct, i know how to change it i had to do this in my 92 mustang gt when i put 3:73 gears in but i dont know how to figure out what gear i would need to put in to make the bronco read correct.