ScienceguyXJ
NAXJA Forum User
- Location
- Colorado Springs CO
Running 37" tires with 5.38 gears and my speedo is reading over by 10%. I measured it by driving 10 miles based off of mile markers and setting my trip meter then doing some math to see how far it was off. I'm wondering if anyone knows how to figure out how many teeth I need on my speedometer gear in my transfer case to get my speedo/odometer back to reading correctly. Did this once before on another XJ with 33s and 4.56s that was also off by 10% I believe and called a performance shop and I think they told me I just needed a gear with 10 more teeth. Does that sound right to anyone? Thanks for any insight.