I bought my mustang used from a guy who said he didnt put anything into the car other then a set of springs. With my car going 60 in 5th gear im at 2,000 rpm and when i put that info plus my tire dimensions and 98 gt tranny into a online gear calculator it says i have 4.10 gears. Can anyone with 4.10 gears and 17inch rims let me know if 60 mph at 2k rpm sounds right?

 

tire size and gear ratio please

 

This doesnt belong in Mod Tech.

 

Easy way to check: Jakc up the rear, put a mark on the drive shaft, turn your wheel one full rotation, and count how many times the driveshaft turns (you use the mark as a reference point). That will tell you your ratio right there. Make sure the car is in neutral too.