Okay, so I have done a search but nothing came up. Which speedo gear do I need to correct for 4.56 gears and 33" tires. I have checked several different websites and some say I need 38, some say I need 39 and one says I need a 37...... so which is closest to factory. Right now I am roughly 7mph off and while the speed doesn't bother me not having a correct odometer does (just being ocd). I found some of each on ebay for around 50 bucks but before I shell out the money I want to make sure I get the right one.

 

You need a 39 tooth gear. I have the same specs as you (4.56 - 33s) and that's what I'm running. Do you need a long or short shaft?