3.73 or 4.10 Gears - Ford Mustang Forum
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post #1 of 16 (permalink) Old 04-18-2012 Thread Starter
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3.73 or 4.10 Gears

For my 2002 GT automatic what does everybody recommend that I go with for gears 3.73 or 4.10s? I sometimes do travel and hour or so highway so I don't know how much higher rpm the car would run with 4.10s if it would be harder on the car or not. What does everyone think?
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post #2 of 16 (permalink) Old 04-18-2012
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My 96 auto GT runs about 2200 rpm's at 55mph...just did a gas mileage...20.6 MPG. MPG with 3.08's was 23.6. Both MPG's are a mix of highway & town driving.
By the way, I used a frpp speed calibrator and am happy with it.
My cruise control seems a bit different (not as smooth, but stays closer to the set speed).
I really like to scrape rubber off the quarter panels.

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play OEM fog lights and switch.
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post #3 of 16 (permalink) Old 04-18-2012
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I was considering goin from my 3.55s to 4.10s on my dd. It sits at 2000rpms at 70mph. Someone told me 4.10s put his closer to 3000 at 70mph. Not good for what I use my car for.
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post #4 of 16 (permalink) Old 04-18-2012
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I have had 3.31, than3.73 and now 4.10's--I like the 4.10's best--I DON'T RACE, BUT i FIND THAT i GET BETTER GAS MILEGE I am in 5th an 6th gear more--Not sure what a automatic tranny would do for you..One thing for sure---4.10's have more grunt to 'em..

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post #5 of 16 (permalink) Old 04-18-2012 Thread Starter
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Thanks for the input everyone. You would think a decision like this would be easier than what I'm making it lol.
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post #6 of 16 (permalink) Old 04-18-2012
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Go big or go home. Get some 6.14 gears.

2003 Mustang GT
Intake & Exhaust: K&N FIPK CAI, Mac O/R H-Pipe, Custom Catback w/ Magnaflow Magnapack Mufflers.
Suspension: H&R Super Sport Springs, KONI STR.T Shocks & Struts, J&M Caster Camber Plates, Steeda Bumpsteer Kit, UPR Elite LCA's & UCA's.
Performance: BAMA 93R Custom Tune, FRPP 4.10 Gears w/ Terminator spec T-Lok.
Planned Mods: FLSFC, Eibach Sway Bars, Throttle Body, Plenum, Rims.
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post #7 of 16 (permalink) Old 04-18-2012
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it depends.. is this car a daily driver? If so than go with 3.73 becuase 4.10's will run at a higher rpm and wear out your tires alot more when you take off. But if your headed to the track... well then 4.10's
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post #8 of 16 (permalink) Old 04-18-2012
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Quote:
Originally Posted by MrWhynot243 View Post
it depends.. is this car a daily driver? If so than go with 3.73 becuase 4.10's will run at a higher rpm and wear out your tires alot more when you take off. But if your headed to the track... well then 4.10's
In city driving people have actually gotten better gas mileage with 4.10's than with stock gears. If you do most highway driving then 3.73's will probably suit you better, although the gas mileage isn't that much worse with 4.10's unless you drive all day long in 70mph.

2003 Mustang GT
Intake & Exhaust: K&N FIPK CAI, Mac O/R H-Pipe, Custom Catback w/ Magnaflow Magnapack Mufflers.
Suspension: H&R Super Sport Springs, KONI STR.T Shocks & Struts, J&M Caster Camber Plates, Steeda Bumpsteer Kit, UPR Elite LCA's & UCA's.
Performance: BAMA 93R Custom Tune, FRPP 4.10 Gears w/ Terminator spec T-Lok.
Planned Mods: FLSFC, Eibach Sway Bars, Throttle Body, Plenum, Rims.
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post #9 of 16 (permalink) Old 04-18-2012
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3.73s work great...you'll need to address wheel hop sooner with 4.10s
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Put 4:10's in my 1990 5.0 and did not like the them. Too whiney and tachy, even in 5th gear. Did bring my 1/4 mile time down from the 14's to the low 13's with a stock motor. Switched to the 3:55 instead, much better.

Have a 97 Cobra with stcok 3:73's and I have no problem with that ratio. If you're looking for short distance performance 4:10's are fine, but don't plan on too much freeway driving.
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Quote:
Originally Posted by DJAlsip View Post
Go big or go home. Get some 6.14 gears.
LOL. Togo's go-to response to gear threads.

Black with saddle 1996 Mustang GT convertible. Manual. NPI, 2v 4.6L. Full bolt-ons.
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Quote:
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LOL. Togo's go-to response to gear threads.
6.14's RULE THE WORLD

I'm tired of noobs not learning to use the friggin search button... but I gotta play it cool so I don't get banned again, lol.

2003 Mustang GT
Intake & Exhaust: K&N FIPK CAI, Mac O/R H-Pipe, Custom Catback w/ Magnaflow Magnapack Mufflers.
Suspension: H&R Super Sport Springs, KONI STR.T Shocks & Struts, J&M Caster Camber Plates, Steeda Bumpsteer Kit, UPR Elite LCA's & UCA's.
Performance: BAMA 93R Custom Tune, FRPP 4.10 Gears w/ Terminator spec T-Lok.
Planned Mods: FLSFC, Eibach Sway Bars, Throttle Body, Plenum, Rims.
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Most people say 4.10s for an auto.. But with 4.10s I don't think you will be keeping your tires stuck to the ground and then your gonna lose some top end if your a little highway roll racer warrior. I'm going with 3.73s in my auto when I get them. It will still help a lot and my tires will still be on the ground for the most part. And then my highway speeds wont suffer to much. Now if its a weekend drag car then go 4.10s I guess. But if its like my car just a car to mess around on the street with 3.73s all the way is my vote
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I have a 98 GT Auto. Just put 4.10's in. I have 17's on the back 275/55 Sumitomo. And a B&M shift kit set to the Street/Strip setting. It does not light up the tires it does however haul @ss.
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Quote:
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I have a 98 GT Auto. Just put 4.10's in. I have 17's on the back 275/55 Sumitomo. And a B&M shift kit set to the Street/Strip setting. It does not light up the tires it does however haul @ss.
Well said. .

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