Please confirm which gears to put in my mustang

[02mach6stang]

i have a 02 5 speed 3.8l and others in the forum said to use 3.73 gears on a manual and 4.10 gears on a automatic. Why do people not recommend 4.10 gears on a 5 speed if it adds much more get up and go?

[iwannagofast]

Eh it dont matter, i got a buddy that has a 5-speed with 4.10s.
The only problem with taller gears is, if you put on a power adder u wont hook on your launch

[chris7869]

How's the wear and tear on the engine rps when cruising the freeway.

Anyone an authority on that one. I here it should be installed w/the t-lok at the same time for v6's so there's no 1 tire fire.

[02mach6stang]

yep def needs t-lok for dual posi but i think the 4.10 gears might put out alot more acceleration than the 3.73 gears

[1234]

but then again you will be cruising down the highway at about 4000 rpms, maybe not 4000 rpms but you get what im saying

[02mach6stang]

my mustang with stock gears at 70mph is at about 2800rpms

[1234]

mine is at about 2400rpms at 70mph, if my buddies math is correct. With 4.10s it should put you around 3500 to 3800 rpms at 65 mph there are quite a few factors in that he cant account for, anybody correct me if im wrong

[SimplyOrangeTPS]

with 4:10s you will be doing 2417rpms at 70mph with 275/45/17 tires(26.74 diameter)

my math is correct...

4.10s are the way to go on a v6, we run 4.10s on a 450rwhp cobra and leave the line just fine.

[1234]

so with 4.10s you will lose rpms in a stock situation

[SimplyOrangeTPS]

what is your final gear ratio?, i put in stock gt 5th gear ratio. im using an online calculator.

[1234]

whatever is stock in an 03 gt

[Scut95]

Quote: whatever is stock in an 03 gt

3.27's

[1234]

good to know thanks

[iwannagofast]

SimplyOrange when i run my friends 95 GT wit Spray on 3.73 catching traction is a pain, what kind of tires you got?

[SimplyOrangeTPS]

ok those numbers i gave you were for a t45, may be a little better with the tremec 3650.

im running 315/35/mikey thompson drag radials, they hook fricken awesome but they are pricey and wear out on the street fast, i paid 700 for 2 shipped, mine hooks solid more due to the suspension, i have fulltubular coilover front and solid race rear. all with no urethane bushings.

[02mach6stang]

so basically you will save gas on the freeway at 70mph just not in the city.
Would there be any problems not hooking with 4.10 gears if i instal a t-lok and have a race suspension all the way around

[SimplyOrangeTPS]

not if the susapension is set up right, i launch at 5K rpm with just a tire chirp hen my nitrous comes in.

, you wont really gain or lose mpg either way

[Scut95]

with 3.73 or 4.10's you'll lose a little bit of mpg on the freeway but you probably will gain some driving in town

[chris7869]

My main concern is about any type of premature wear any where as a result of the gear change.

[SimplyOrangeTPS]

no premature wear on anything else, we havent found much difference on average for mpg by switching to 4:10s its just more tempting to romp on it so most people lose mpg because of that fact.

[Y2E0L0L5OGWT]

"Don't fear the gear!"

4.10's in conjunction with a T-Lok for a V6 is the way to go without a doubt....

[chris7869]

I dont know why I had 3.73 in mind for a V6 stick. I thought 4.10 was for Automatic for smoe reason. NO?