austintimmerman

i am looking at putting gears in my car but i cant decide if i want 4:10 or 3:90 what would anyone prefer? and how much of an increase in rpm will these gears gime me on the highway? Let me know peeps!

Colorado_Mustang

RPM = ((336*gear ratio*MPH)/TireDiam)

You likely have a .68 overdrive right now.

Personally, I'm going with 3.73's, but the search function would net you a lot of 4.10 votes.

bestjudge

Iam getting 4.10(4.30 maybe)in 99gt vert in couple weeks..

2000GT4.6

There isn't gonna be a major difference between the 3.90s and 4.10s.

eRock08

which gears are better for highway driving? but still an upgrade from stock?

99gtstang

i just got 373s i like them i want more kick but i drive alot........... traction is great no spin just bark 2nd and 3rd. with street tires. First gear will only spin if i dump the clutch, with 315s.... if you don't drive everyday on the hwy i would go with 410 if so go 373s

eRock08

well. Were i live i pretty much am either stopped or going 55-80mph. so lower gears would help with fuel economy right?

Colorado_Mustang

3.27 will give you better mileage at highway speeds. 4.10's will help around town in stop and go traffic.

mustangman02232

fixed