aode08

I WENT FROM STOCK GEARS 3:08 TO 4:10 GEARS AND HAD THEM INSTALLED AT THE DEALERSHIP.

IM NOT NOTICING ANY MAJOR IMPROVEMENT IN ACCELERATION. Does it take time for the gears to break in or something, or does that mean its the engine not producing enough power?

the rpms climp up on the highway now though.

see my sig

creepshow

3:08 to 4:10....yeah, should be big difference? What RPM`s are you at 60mph?

aode08

im at 2200 SOME AOD TRANNY

91lxstang

u should be at 2600 at 70 mph.... if not then u dont have 4.10's unless ur runnin a diff than stock tire

5.0 MPG

yea everyone notices a big difference with gears. something isnt right

aode08

dam!

your right ill have to check my stock tire size!!



i know they are 15's on there, but now also my speedo is off, so i need to know what to look for here as far as your calculations

All4n

you need to get a $10 speedo gear for 4.10 gears.

PX429

You have an Auto right? so all your doing is riding out your OD more. So there is a differance but nothing too noticeable

Goosepoop302

with 3.73 gears where sould my tach be at 60 mph?

PX429

http://www.fordmuscle.com/calculators/rpm.shtml