I just swapped to 3.73 from 2.73 gears. The place that did the work put a black 20t speedo gear into the T45 transmission. At 60mph my speedo was saying I was doing 71-73mph. I swapped out the 20t for a red 21t speedo gear and now at 60mph its says I am doing closer to 65mph. Has any one else had this issue at all? I am not sure what is offered past 21t but it appears to me that I may need a 22t gear. The speedometer was pretty damn close to being right on before the gear swap.
Any ideas?
Any ideas?