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Discussion Starter · #1 ·
I have a 2001 get with a few mods, I'm looking to put more power and want to know the best gears you guys would recommend. I wanna try and keep as much top mph as I can but really wanna be thrown in the seats. I drive my car like I stole it so I like to have fun. Any input would be great! Thanks
 

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4.10s
 

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Discussion Starter · #3 ·
Now what brand would be the est. I mean when I goto do the swap I'm doing everything . Gears axles, spline, the whole rear end .
 

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Check out American muscle they have all that they have 4.10 gear install kit with everything you need and then search for axles and everything you need. Ford racing is a good one.
 

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Discussion Starter · #7 ·
Yea I usually go through them for all my parts. Now when you say stay original with 3.90s do you just mean that's what most people prefer and not the 4.10s because of the gas mileage and top mph loss.
 

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Yea I usually go through them for all my parts. Now when you say stay original with 3.90s do you just mean that's what most people prefer and not the 4.10s because of the gas mileage and top mph loss.
What I said was be Original. Lol. Most people go 3.73 or 4.10s. 3.90 is a good cross between the two. Better acceleration then 3.73s but better top end then 4.10s.
 

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Discussion Starter · #9 ·
3.73 were deff a top runner in my choices but I deff want a good launch when at the drag races . Have you tried other ones or just the 3.73

---------- Post added at 09:11 AM ---------- Previous post was at 09:10 AM ----------

Oh ok , yea I see it now lol. My bad . I was thinking the same thing. It's deff the in between set. Do you have those on your mustang
 

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3.73 were deff a top runner in my choices but I deff want a good launch when at the drag races . Have you tried other ones or just the 3.73
I've still got the stock gears in mine for now. That will be my last mod to my car when I'm done with the motor and everything else. But I'm thinking more along the lines of 3.73 if not 3.90 when I do.
 

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Discussion Starter · #11 ·
Yea thats going to be my choices i think as well, what gears do you like the most. Do you think you will change your spline out and axles
 

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Yea thats going to be my choices i think as well, what gears do you like the most. Do you think you will change your spline out and axles
As far as like brands and axles and all, I haven't really dug to deep into that just yet. Right now I'm focusing more on at either doing a top end build or turbo kit. Not sure which one I want to do first. Lol
 

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Actually 3.90s do not necessarily have a better top end. For best top end you have to figure out what top speed your car is capable of and then use the gear that will give you peak power at that mph.

example: 2004 Mustang Gt (Drag co .38, frontal area 22sqft, weight 3400lbs, rwhp 250) would have the potential of sustaining 160mph. So you want a gear that will give you peak h.p. at 160mph.

So if peak h.p. is at 5500rpms with a 25.5 inch tire and a .62 overdrive you will need a gear that hits 5500rpms at 160mph.

3.55 at 5500rpms is 189mph
3.73 at 5500rpms is 180mph
3.90 at 5500rpms is 172mph
4.11 at 5500rpms is 163mph
4.30 at 5500rpms is 156mph

Also remeber that you loose power in overdrive so a Gt that dynos at 250rwhp is probably only able to reach a top speed of 155mph.
 

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Actually 3.90s do not necessarily have a better top end. For best top end you have to figure out what top speed your car is capable of and then use the gear that will give you peak power at that mph.

example: 2004 Mustang Gt (Drag co .38, frontal area 22sqft, weight 3400lbs, rwhp 250) would have the potential of sustaining 160mph. So you want a gear that will give you peak h.p. at 160mph.

So if peak h.p. is at 5500rpms with a 25.5 inch tire and a .62 overdrive you will need a gear that hits 5500rpms at 160mph.

3.55 at 5500rpms is 189mph
3.73 at 5500rpms is 180mph
3.90 at 5500rpms is 172mph
4.11 at 5500rpms is 163mph
4.30 at 5500rpms is 156mph

Also remeber that you loose power in overdrive so a Gt that dynos at 250rwhp is probably only able to reach a top speed of 155mph.
Great info! But how often does someone reach top speed for real? The fun part is when you get kicked back into your seat when you launch, lower gearing will help that.
 

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Discussion Starter · #17 ·
Thanks a lot . Your thoughts and info are helping me a lot. I'm think then lowest ill go is 3.73 and the highest might be 3.90. 4.10 only if I wanna give my girlfriend whiplash. Lol
 

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There are a million of gear threads o this site. Do a search, read a little, make a decision based off of your research. . It seems like every week a new gear thread pops up.
 

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Discussion Starter · #19 ·
Well instead of searching its a lot easier to just ask what's on my mind. So if you want to be negative about what people ask. Don't bother posting bud. Mind your own and keep moving on.
 
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