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Old 08-04-2013, 06:02 PM   #1
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Need Help With Gearing!

Right now I have an 08 GT with 3.55's. I was thinking of going 4.10's but I have a couple of questions!

1) is it REALLY as big of a difference as everyone says?

2) what's the difference between 3.55s and 4.10s feeling wise?

3) I'm planning on installing a turbo over the winter and was wondering I'd the 4.10s will hinder the turbos boost or help it? If it will help it get to boost faster if the boost is made at a higher rpm, them ill get a larger turbo, if it doesn't at all, then I don't really know what to do yet! Thanks guys!
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Old 08-04-2013, 10:16 PM   #2
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do it!

Personal experience......
410s are fantastic on my 07 gt 5 speed, had factory 331 gears.
I did 410s on a automatic car, and I would say these are a must on a auto ....
As for turbo or sc applications, you may want to do a 373 or stick with your 355s. It seems like boosted cars just make 1st gear useless IMO....
I would do 410s and when you boost go to 373s, and sell your 410s, but I do them myself and have zero labor cost..... good luck, and check out the american muscle acceleration pack video clips.
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Old 08-04-2013, 10:42 PM   #3
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Ghabks for the help. I have a 5 speed car. Does anyone have any more advice?
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Old 08-05-2013, 05:36 AM   #4
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if it is your daily then I would go with 3.73 and that's what I got and its a hell of a difference I think. but if not go for 4.10 to help you get the high rpms that you might be looking for especially if you want your car on the track. I run the track with my 3.73 and I run mid 7 on a 1/8. so that might help you
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Old 08-05-2013, 07:01 AM   #5
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ok.

Do your research online first and see if someone with 410s will take you for a zip. Anyone that was undecided, I sell them on 410s with a normal ride and a hard power run.
Just keep in mind these are not the old fox body stangs that are at 4500 rpm at 65mph on the highway ......
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Old 08-05-2013, 07:13 AM   #6
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Do your research online first and see if someone with 410s will take you for a zip. Anyone that was undecided, I sell them on 410s with a normal ride and a hard power run.
Just keep in mind these are not the old fox body stangs that are at 4500 rpm at 65mph on the highway ......
I don't care about MPG, i didnt buy a mustang for its gas milage but I do care about spool time. I'm just worried that if I put them in, and then turbo it over the winter, the gears will make the turbo useless. I know if I had a turbo, 4.10s and a wot box running a 2 step, it would launch HARD. But I'm just wondering, do 4.10s pull as hard as everyone says? ( torque feels higher?) Because I've heard that the car pulls in 3rd gear like it would in 2nd or even 1st, is this true?
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Old 08-05-2013, 06:56 PM   #7
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I would do 410s. Launches hard and if your turbo, run a 10" slick. You will find out what a hard launch is..... install some prothane bullet poly engine mounts and your golden. Everything in your center console will be shaken, not stirred now.
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Old 08-07-2013, 11:35 AM   #8
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+1
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Old 08-07-2013, 11:43 AM   #9
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4:10 is a deadly gear setup. Don't expect much in the hiway tho other than a screaming motor. Lol. I run 3:83 in the hatch. It's super fun in town, but if a vette pulls up beside you on the hiway don't expect to outrun him.
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Old 08-07-2013, 12:43 PM   #10
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4:10 is a deadly gear setup. Don't expect much in the hiway tho other than a screaming motor. Lol. I run 3:83 in the hatch. It's super fun in town, but if a vette pulls up beside you on the hiway don't expect to outrun him.
At 70 mph I'm at like 2600 rpm with 410s, 355s is what 2300 rpm at 70? The difference is not insane but it gets up and goes a lot faster
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Old 08-07-2013, 12:51 PM   #11
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At 70 mph I'm at like 2600 rpm with 410s, 355s is what 2300 rpm at 70? The difference is not insane but it gets up and goes a lot faster
Compared to 70mph @1750rpm with 3:23's. lol. But who's looking for fuel mileage!!
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Old 08-07-2013, 02:16 PM   #12
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I know a guy who has a 05 GT, 5speed, built motor, supercharged & nitrous making high 600hp. He has 4.10's & he says he loves them & it's not too much gear. I got 4.10's as well spraying nitrous & yes the gears made a huge difference to me, compared to the 3.31.
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Old 08-07-2013, 04:07 PM   #13
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A fox body is a different beast with gears hands down.
410s are what you want.
I put them in my 05 gt manual and my 07 gt manual.
They ReallY wake up a automatic.
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Old 08-10-2013, 10:23 PM   #14
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I put 4:10's in my manual supercharged mustang against the advise of others... now after driving and racing this car as much as I have I would like 3:90's
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Old 08-11-2013, 09:48 AM   #15
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Key word is supercharged....
I have had good experience with 373's and people being pleased, I have not done 390's before
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Old 08-11-2013, 10:32 AM   #16
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Key word is supercharged....
I have had good experience with 373's and people being pleased, I have not done 390's before
and if you read his previous part he said he wants it to work even if he put a turbo on his car this winter.........
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Old 08-11-2013, 11:22 AM   #17
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87 89 or93? Ok so right now my Stang is stock, except for I pulled my mufflers off. All that did was raise my horse and lower my torque, but seriously I love the sound and I can't feel a diff. So I been researching this octane dilemma and did some experimenting. Gas mileage isn't my concern lets face it just stop hittin it so dam much.... So I ran 93 in him for a while, ran good, but one day the gas attendant gave me 87,? and I was empty for sure. Drove to work got about half way, it sounded different and he was pullin. I was like whoa what just happend? Played a Lil on my way to work. I was confused so research began. 93 octane fuel is only good if your compression is 10 to 1 or better or if you run a tune along with a cold air intake. That alone is 40 50 horse good gains.. My 05 is 9.8 to 1 and so it's not quite 10 I guess makes sense in the world of fuel study and the numbers behind them. After all that and what I understood. Fuel compresses and ignites by spark. For max horse out of combustion that timing of spark and compression need to be in sync for optimal performance. The fuel octane reading is the number that tells you how much compression it needs to burn it. The higher the number 93 the higher the compression you need. My suggestion is to run 89 in your stock mustang gt for maximum performance out of your fuel. That's what I did and he runs real good and sounds real nice. Races a charger with a Hemi I had him In First and second and I know I had him, but I let off. I also beat 91 with a 5.0 and he had a gt40 motor with exhaust ignition 373 gears I took him and dusted him in 3 rd was pullin. I just wanna say cams is next for me I can't wait to live that sound and power.... I hope this helps someone and thanks for reading...

Joe stock 2005 mustang gt.... Check out the super snake and the cobra jet......
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Old 08-11-2013, 05:40 PM   #18
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This last post really lost me......?

I did read the original post but it has gotten away a little here....
I would do the 410s now....
Plans over the winter may change and then your asking the same question this time next year.... used 410s are going to bring at least $125 if you go to 373s, maybe find someone willing to trade as well...
Your call.
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Old 08-12-2013, 04:03 PM   #19
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Sorry new to this I posted it in the wrong spot...
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