4.10 vs. 3.73

Mayrose901 · December 27th, 2011, 03:22 PM

Ok so I have a 2002 GT and want some gears. Im debating between 3.73 and 4.10. I do mostly intown driving with highway every once in a while. Gas mileage isnt too big of a concern unless I get like 10mpg lol. Just wanted everyone opinions. Thanks

me2dumb4college · December 27th, 2011, 03:27 PM

auto or man?

Froush · December 27th, 2011, 03:32 PM

If you have a manual and don't plan on fi the 4.10s. If you plan on fi 3.73s. If you have an auto then 4.10s either way

ReverendDexter · December 27th, 2011, 03:42 PM

You'll never get a definitive answer on that. There's a reason that it's the most commonly created thread on this board, lol.

One thing to keep in mind is that those gear ratios are very close.

If you peg out 2nd with 3.73s at 60mph, 4.10s will still have you at 55mph. If you cruise at 70 mph at 2400 with 3.73, you'll only be turning another 240 rpm with the 4.10s.

04GTdrop · December 27th, 2011, 03:53 PM

I went back and forth myself for months...my vote is without a doubt 4.10's. I do quite a bit of highway driving and actually can get better mileage if I keep my foot out of it. I don't think 3.73's would have been enough for me. Search some of the older 4.10 vs 3.73 threads... hundreds of em

Mayrose901 · December 27th, 2011, 03:57 PM

Its a manual forgot to add that. What about 3.90? Kind of an inbetween.

Shaun03GT · December 27th, 2011, 03:59 PM

Originally Posted by dbowen2007

If you have a manual and don't plan on fi the 4.10s. If you plan on fi 3.73s. If you have an auto then 4.10s either way

Why does everyone say that?? That's so much bs.

Go 4.10s either way. 4.10s with boost is not to much at all. I went from 4.10s with the blower, to 3.73s and regret it. I'm going back to 4.10s in a couple months.

Id consider 4.30s too.

T-Lee. 30 · December 27th, 2011, 04:02 PM

Originally Posted by 04GTdrop

I went back and forth myself for months...my vote is without a doubt 4.10's. I do quite a bit of highway driving and actually can get better mileage if I keep my foot out of it. I don't think 3.73's would have been enough for me. Search some of the older 4.10 vs 3.73 threads... hundreds of em

on the highway keeping your foot out of it want matter bc with 4.10s the rpms will be higher on the hwy vs 3.73s so flooring it or not the rpms will be higer with one vs the other and more rpms often means more gas being burnt. its easier/takes a lil less effort for the 4.10s vs 3.73s or 3.23s to get up to speed so in that sense getting on it a bit may make a lil bit of a difference but on the highway a diff story. All that bull aside though OP said he could careless about the mileage and I think the 3.90s would be a happy medium. thats just my opinion though.

But in a short way to answer your question a good answer is "its and endless debate" no definate answer bc opinions vary.

chiefsmustang20 · December 27th, 2011, 04:06 PM

Yea I agree with Shaun 4.10s either way boost or no boost all by buddies with boost have 4.10s

Sent from my Autoguide iPhone app

motoracer11 · December 27th, 2011, 04:37 PM

I have 4.10's in mine and love them although I don't have anything to compare them to since I bought it with them. The car is fairly quick and on the freeway at 75 I can average 20mpg still...driving the shit out of the car for a whole tank still yields around 18...

ham sandwich · December 27th, 2011, 04:42 PM

4.10 or suck a diiiick

TaintedStang · December 27th, 2011, 04:52 PM

4.88's or get the fuck out!

motox727 · December 27th, 2011, 06:04 PM

I have 3.73s and I hate them, call me crazy but I actually like stock better..

glittle75 · December 27th, 2011, 06:07 PM

I have 4.10's with my KB, and wouldn't have it any other way. I dont understand where the debate is? 4.10's or nothing.
Unless your car is set up for one specific thing, AX, 1/8th, etc..

T-Lee. 30 · December 27th, 2011, 06:22 PM

Originally Posted by Mayrose901

Ok so I have a 2002 GT and want some gears. Im debating between 3.73 and 4.10.

Endless Debate!!!

codycat91 · December 27th, 2011, 06:26 PM

Type of boost also matters, as well as power. For example, with a procharger at around 400rwhp, 4.10's should be fine. With a PD blower though, you would want lower since there is instant torque. For example, I will be around 575rwhp with a ported eaton and I have 3.55's

Mayrose901 · December 27th, 2011, 06:31 PM

Originally Posted by codycat91

Type of boost also matters, as well as power. For example, with a procharger at around 400rwhp, 4.10's should be fine. With a PD blower though, you would want lower since there is instant torque. For example, I will be around 575rwhp with a ported eaton and I have 3.55's

Thats another thing. Right now I only have a couple bolt ons. I was considering heads cams and a tun to get about 300whp or procharge it or put a kb on it ( If I can get the money from my fourwheeler) and get around 380

T-Lee. 30 · December 27th, 2011, 06:33 PM

Originally Posted by Mayrose901

Thats another thing. Right now I only have a couple bolt ons. I was considering heads cams and a tun to get about 300whp or procharge it or put a kb on it ( If I can get the money from my fourwheeler) and get around 380

depending on what heads/cam pkg you want you will be paying the same or even more than some vortech kits. But the procharger kits and kb's seem to be closer in price.

T-Lee. 30 · December 27th, 2011, 06:34 PM

Originally Posted by ham sandwich

4.10 or suck a diiiick

way off topic but nice car in your sig!!!!

SSG Pate · December 27th, 2011, 07:36 PM

Originally Posted by ham sandwich

4.10 or suck a diiiick

Ham whats with you and all the Dick stuff? Are you in the navy?

December 27th, 2011, 03:22 PM	#1
Mayrose901 Newbie Join Date: Jul 2011 Posts: 38 iTrader: 0 reviews	4.10 vs. 3.73 Ok so I have a 2002 GT and want some gears. Im debating between 3.73 and 4.10. I do mostly intown driving with highway every once in a while. Gas mileage isnt too big of a concern unless I get like 10mpg lol. Just wanted everyone opinions. Thanks

December 27th, 2011, 03:32 PM	#3
Froush Enthusiast 2002 Mustang launch soft, shift slow, stay slow Join Date: May 2011 Location: Newport News, VA Posts: 729 iTrader: 4 reviews	If you have a manual and don't plan on fi the 4.10s. If you plan on fi 3.73s. If you have an auto then 4.10s either way __________________ "Happiness is being blown and stroked at the same time" V6 => vt 302 forged stroker My Build Thread click link http://www.moddedmustangs.com/forums...shs-build.html

December 27th, 2011, 03:42 PM	#4
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,808 iTrader: 0 reviews	You'll never get a definitive answer on that. There's a reason that it's the most commonly created thread on this board, lol. One thing to keep in mind is that those gear ratios are very close. If you peg out 2nd with 3.73s at 60mph, 4.10s will still have you at 55mph. If you cruise at 70 mph at 2400 with 3.73, you'll only be turning another 240 rpm with the 4.10s. __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\

December 27th, 2011, 03:53 PM	#5
04GTdrop Regular 2004 Mustang GT convert Join Date: May 2010 Location: Denver Posts: 67 iTrader: 0 reviews	I went back and forth myself for months...my vote is without a doubt 4.10's. I do quite a bit of highway driving and actually can get better mileage if I keep my foot out of it. I don't think 3.73's would have been enough for me. Search some of the older 4.10 vs 3.73 threads... hundreds of em __________________ Borla Stingers, JBA O/R H, K&N CAI, MGW short throw, FRPP 4.10's, FRPP "c" springs

December 27th, 2011, 04:06 PM	#9
chiefsmustang20 Enthusiast '02 VERT 13.08@106.11 Join Date: Sep 2007 Location: TEXAS Posts: 646 iTrader: 0 reviews	Yea I agree with Shaun 4.10s either way boost or no boost all by buddies with boost have 4.10s Sent from my Autoguide iPhone app __________________ CMS STAGE II FRPP 4.10s LTS, O/R H, FLOWMASTER WELD ONS EDELBROCK INTAKE MHS 6061 ELBOW NX PLATE 100 SHOT SCT X3 TUNED BY JOE MANSFIELD AT ABOVE AND BEYOND PERFORMANCE

December 27th, 2011, 03:27 PM	#2
me2dumb4college Enthusiast Join Date: Sep 2011 Location: Reston, VA Posts: 866 iTrader: 0 reviews	auto or man?

December 27th, 2011, 03:57 PM	#6
Mayrose901 Newbie Join Date: Jul 2011 Posts: 38 iTrader: 0 reviews	Its a manual forgot to add that. What about 3.90? Kind of an inbetween.

December 27th, 2011, 04:37 PM	#10
motoracer11 Newbie 2003 Mustang GT Join Date: Aug 2010 Location: Acton, CA Posts: 23 iTrader: 0 reviews	I have 4.10's in mine and love them although I don't have anything to compare them to since I bought it with them. The car is fairly quick and on the freeway at 75 I can average 20mpg still...driving the shit out of the car for a whole tank still yields around 18...

December 27th, 2011, 04:42 PM	#11
ham sandwich Regular Join Date: Oct 2011 Posts: 195 iTrader: 0 reviews	4.10 or suck a diiiick __________________ 01 Bullitt #03179 Full bolt-ons. Cams incoming!

December 27th, 2011, 04:52 PM	#12
TaintedStang MM's Taint Shaver! 2003 Mustang GT Join Date: Dec 2009 Location: Oregon Posts: 6,528 iTrader: 5 reviews	4.88's or get the fuck out! __________________

December 27th, 2011, 06:04 PM	#13
motox727 FOBRA DRIVER 2002 Mustang GT Join Date: May 2010 Location: Omaha, NE Posts: 20 iTrader: 0 reviews	I have 3.73s and I hate them, call me crazy but I actually like stock better..

December 27th, 2011, 06:07 PM	#14
glittle75 Enthusiast 2003 Mach 1 Join Date: Apr 2011 Location: NC Posts: 726 iTrader: 0 reviews	I have 4.10's with my KB, and wouldn't have it any other way. I dont understand where the debate is? 4.10's or nothing. Unless your car is set up for one specific thing, AX, 1/8th, etc.. __________________ 2003 Azure Blue Mach 1 - KB, Suspension, Bolt-ons. 497hp, 460tq.

December 27th, 2011, 06:26 PM	#16
codycat91 MM Fanatic 2003 MUSTANG GT Join Date: Dec 2010 Location: Buffalo, NY Posts: 3,497 iTrader: 10 reviews	Type of boost also matters, as well as power. For example, with a procharger at around 400rwhp, 4.10's should be fine. With a PD blower though, you would want lower since there is instant torque. For example, I will be around 575rwhp with a ported eaton and I have 3.55's __________________ 4v MMR 4.75 Stroker, Teksid block .020 over, 9.27:1CR, Posi Race Ported Eaton 4v MMR Stroker 1000 / Posi Race Ported Eaton Build How To: 2v to 4v COP Swap

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