stay with 3:55 or go 4:10

screamingmach1 · Apr 9, 2004

i have an 04 mach1 with stock 3:55 gears. Should i go with the 4:10 gears, and what do i need to change them properly? i.e. speedo corrector, gears, and what?

CottonBurnerz · Apr 9, 2004

Since you have more rpm range than 2v.. I say go with at least 4:30

you will need to change the speedo to match with the gear and tire diameter..

You can correct the speedo by speedcal, reflash EEC, or a chip

billyfe390 · Apr 9, 2004

screamingmach1 said:
i have an 04 mach1 with stock 3:55 gears. Should i go with the 4:10 gears, and what do i need to change them properly? i.e. speedo corrector, gears, and what?

never fear the 4.10 gear. Get the 4.10's and just have the computer reflashed to correct the gear ratio.

JOHNS01GT · Apr 9, 2004

screamingmach1 said:
i have an 04 mach1 with stock 3:55 gears. Should i go with the 4:10 gears, and what do i need to change them properly? i.e. speedo corrector, gears, and what?

Definately change the gears, 4.10s or 4.30s like CottonBurnerz said, and that Mach will scream!!!

2002BLGT · Apr 9, 2004

screamingmach1 said:
i have an 04 mach1 with stock 3:55 gears. Should i go with the 4:10 gears, and what do i need to change them properly? i.e. speedo corrector, gears, and what?

if you change them , ill give you 50 bucks for the 3.55s , friend on mine has a fox body we are building on a budget , and i mean LOW dollar budget , 2.73s have to go

CatmanJJ · Apr 9, 2004

Just a thought, I barely have traction with my stock gears, so going to something like 4.10s + will make launching even more of a task, so you might want stickier tires too but, a fair amount of Mach owners who have used DRs have broken an axle and need to upgrade their rear which is a lot of $$$.

That being said, I loved 4.10s in my GT, they are sitting in my bedroom right now, I'm debating on having them installed on my Mach.

wms004 · Apr 9, 2004

4.10 that beast

downsouthman1 · Apr 9, 2004

I have a Mach also & have been dabating for a couple weeks getting either 4.10s or 4.30s installed. It'll be a future mod, definetely if I ever do it. But I want to beef up w/ rear-end @ the same time w/ either some 31 or 33-splines & other stuff.

krly79 · Apr 9, 2004

If you have an auto then you don't have more rpm's than a 2v. If you have a 5spd then you do have more of an rpm range and you should go with 4.10's or 4.30's maybe. I love my 4.10's and would have been really disappointed if I went with anything less. I also have a speedcal that is really easy to set and can even adjust for different tire sized, but only works for a 5spd.

screamingmach1 · Apr 9, 2004

my car is a 5spd. also, i am 21 and dont have a lot of excess moneyto burn, so how common is it to blow a rearend out with the 4:10's?

billyfe390 · Apr 9, 2004

screamingmach1 said:
my car is a 5spd. also, i am 21 and dont have a lot of excess moneyto burn, so how common is it to blow a rearend out with the 4:10's?

Its not.

If you dont beat the crap out of the car you are extending the life of the drivetrain with the higher ratio gears simply because it is easier for the engine to get the car moving.

Slapyo · Apr 9, 2004

4.10s!!

GinoGT · Apr 9, 2004

AT LEAST 4.10's! With a 4v 5 speed, I would SERIOUSLY consider 4.30's since you got that big rev limiter to enjoy.

Awesome opportunity to build the rear end while you're at it. 31 spline eaton limited slip and moser/strange/whatever axles. Weld the torque boxes and axle tubes.......high rpm clutch dumps onto slicks for you.

Oh yeah, TKO tranny and nice clutch too. Then some better control arms and.........

RedGTvert · Apr 9, 2004

Don't waste your money on 4.10's, go with 4.30's.

screamingmach1 · Apr 10, 2004

i already have the 4:10's fromm when i had my 98 cobra. so those would be the gears i would put in. thanks for all the help

Dark Knight GT · Apr 10, 2004

If I had a 7k rpm rev-limiter, Ide go with 4.56 gears.

White Stang · Apr 10, 2004

If my car had 355's I would just leave them in and be . I would not do that jump to 410's unless all you are doing is 1/4 mile runs and city driving. I really think 373's are the best over all gears for daily driving and performance. But changing from 355's to 373's would not do much. But if you installed some drags in the back and installed 410's you would love that launch. I would not do it though unless I had a six speed

wms004 · Apr 10, 2004

RedGTvert said:
Don't waste your money on 4.10's, go with 4.30's.

you are the first person i've heard say that 4.10's are a waste

GinoGT · Apr 10, 2004

Maybe a waste if you have the RPM range of a 4v. They can get away with 4.30's.

Do NOT fear 4.10's for highway driving. I love being on the highways, the ride is fine, and I don't burn fuel like a fighter jet. An aluminum driveshaft makes a HUGE difference, especially with taller gears since you're revving higher.

Dark Knight GT · Apr 11, 2004

RedGTvert said:
Don't waste your money on 4.10's, go with 4.30's.

I have to agree with RedGTvert here. Anything less than 4.30's in a serious 4v car would be a waste. Just my opinion. If the Mach 1's have a 7k rev-limiter like the Cobra's, Ide go with 4.56 gears. No doubt in my mind.

stay with 3:55 or go 4:10

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