I and Davis3 recently built a pretty killer rear end for my Stang. I've installed it with 3.73s. After installation the speedo was off a decent amount (I anticipated this). I recently purchased a LMR speedcal and installed it. I followed the instructions of the speed cal and it seems to work great. I configured the speedcal to the chart supplied by LMR. Now when I drive it, the speedo seems to be about 5MPH too slow. Does this mean I had a different gear ratio in the rear of the Mustang and I should calibrate it to something else? Help please! Hah 
1995 Mustang GT 5 Speed.
Nevermind. Looks like mine may have had an optional 3.08. I'll search before I speak. lol
1995 Mustang GT 5 Speed.
Nevermind. Looks like mine may have had an optional 3.08. I'll search before I speak. lol
