I recently finished swapping my rear axle from a Dana 35 with 3.08 gears to a Dana 44 with 3.73 gears. I have 245/75R16 tires so 30.5”. Referencing the numerous charts online, they all said to use a 33 tooth gear for the VSS. Swap it in and my MPH is reading 5mph over the GPS verified speed. I ensured I had the VSS clocked correctly to show 32-38 at the 5-o’clock position and verified the gears are in-fact 3.73 by counting pinion to tire rotations. Prior to the axle swap I the speedo was reading very slightly slower than actual speed since I had smaller tires from the factory.
So I am at a loss on what my issue might be. Any suggestions?
So I am at a loss on what my issue might be. Any suggestions?