nicknack1016

wow really? 3.55s? I thought they were 3.31s but thats with the autos. So about 2500 rpms doing 70 won't really bother me much, and 3.73s would really be a waste. Thanks for all the help guys =)

gman73

05-10 autos come with 3.31

Local Yokel

I have 4:10's with a 5 speed and a Vortech and I am SO glad I past up the 3:73's. I still cruise at 75/80 on the highway and the lower gear makes the car so much easier and fun to drive.

Margarita Girl

If you have low miles, you won't need to switch the bearings. Ask your installer first. They may already have everything you need, including the gears. Make sure you purchase the FRPP and not the Motive.

I have a manual and switched out the 3.55's for 4.10's two years ago.

bynumj

Here is a gear chat that may help. I have a Vortech and have no problems.

https://mustangforums.com/forum/2005...ear-chart.html

alkemist

I have 4.10's and love em, driving an auto. If you have an auto and you run custom tune, you need to make sure the tuner rewrites it because the shift points will need to be adjusted. I've never used Bama but I'm too satisfied with Brenspeed to change out.

joutcelt

I have an auto with 410's and i think its a great gear to have. Not just for the fun factor. I recently drove from indianapolis to atlanta and there are some goo sized mountains u go up and down. My car never once down shifted or lost any speed going up. Plus going down ur not pressing on the brake pedal as much. plus when ur are on a on ramp and u need to get going U can. I was getting 23 mpg also when i made the trip to atlanta

REDBOSS1

I have had 4.10's in my car for about 8 months and the whole RPM/Gas thing is garbage. If you are N/A it's 4.10's or bust IMO. I'm having my 3.55's put back in because I'm having a supercharger installed and I want the taller gear to let it work but the 4.10's are the way to go for N/A. Don't let MPG or RPM's scare you, I drove from Pensacola to Cincinnati and got 25 mpg at 2500 rpm.

Greg06GT

OP did you decide yet? I'm installing my 4:10s saturday cant waitttt

Simon1

I'm on my 4th set of gears since I've had the car.

You will need:

ring/pinion
pinion nut
crush sleeve
bearings
shims and races.

If you get the kit from latemodelrestoration.com it includes thegasket, fluid and friction modifier. $249.99.

Ask your shop what they have and what they charge for parts.

Labor is usually $300-$400 at the most.