Tigers, I recently swapped my stock 2.88 rear end gears for a 3.73 posi unit. I'm using an Auto Meter Pro Comp speedometer connected to a T-5 tranny. Of course, the speedo is indicating more than 2x the actual speed. How do I find out which reduction gear (or something else) I need to have it indicate the correct speed? Thanks in advance. Tym McDowell