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Old 09-23-2011, 02:13 PM   #1
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Re: 4.10 Gear Speed/RPM Video

im glad u made that video... it definatley makes me wanna stay away from 4.10's for a highway driven car. im gonna assume you have stock injectors.. i definatley cant afford that kinda 65-70mph rpm with 30lbs inj.

if i had a 6spd i think i would be all over it.

again, thanks for the video.. it clarified things for me
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Old 09-23-2011, 02:51 PM   #2
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Re: 4.10 Gear Speed/RPM Video

Excellent idea!
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Old 09-23-2011, 03:16 PM   #3
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Quote:
Originally Posted by svtlx
im glad u made that video... it definatley makes me wanna stay away from 4.10's for a highway driven car. im gonna assume you have stock injectors.. i definatley cant afford that kinda 65-70mph rpm with 30lbs inj.

if i had a 6spd i think i would be all over it.

again, thanks for the video.. it clarified things for me
Heard that! Glad it helped you make your decision! And yeah, I still get over 20mpg cruising 65 on the interstate. Lol. Stock injectors.
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Old 09-23-2011, 09:03 PM   #4
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Re: 4.10 Gear Speed/RPM Video

Oh, and just to add to this. 4.10 adds about 300-400rpm on a stock gear of 3.27 with the tremec 3650 5speed. So 3.73 will be slightly less than this but still a relatively noticeable difference. I'd guess in the 200-300rpm increase range. City mpg will go up if you short shift, and hwy mpg will only go down by 1-4mpg.

The reason people seem to see such bad gas mileage is because it's so hard to not stand on it all the time. And third and fourth gear finally do something so hwy and interstate driving is much more fun! When I stay in the throttle I can get down to 12-15mpg. Lol

It's so worth it.
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Old 09-24-2011, 06:55 AM   #5
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I do all city driving in my car, so with 4.10's I should get better mpg then or maybe 3.73?
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Old 09-24-2011, 06:59 AM   #6
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Re: 4.10 Gear Speed/RPM Video

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I do all city driving in my car, so with 4.10's I should get better mpg then or maybe 3.73?
For the most part yes, you can always have a heavy foot and get lower mileage, but for the most part you will see an increase in normal city traffic.
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Old 09-24-2011, 08:59 AM   #7
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Re: 4.10 Gear Speed/RPM Video

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For the most part yes, you can always have a heavy foot and get lower mileage, but for the most part you will see an increase in normal city traffic.
That is correct. But if you love the sound of your car in higher RPMs.. Your MPGs can always dip way down. But if you behave yourself it does increase city mpg. :]
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Old 09-24-2011, 09:37 AM   #8
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That is correct. But if you love the sound of your car in higher RPMs.. Your MPGs can always dip way down. But if you behave yourself it does increase city mpg. :]
Well the thing I hate the most about the stock gears is, it feels like 3-4 has no power in it. Just wondering if its worth the swap if I do get worse mpg. My 02 GT is a daily driver right now.
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Old 09-24-2011, 09:58 AM   #9
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Re: 4.10 Gear Speed/RPM Video

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Well the thing I hate the most about the stock gears is, it feels like 3-4 has no power in it. Just wondering if its worth the swap if I do get worse mpg. My 02 GT is a daily driver right now.
My '02's 3rd and 4th really woke up! I'm completely satisfied with it and it's completely worth any mpgs less. Remember.. With Mustangs, we more or less base ourselves on smiles per gallon. :p
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Old 09-24-2011, 10:05 AM   #10
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My '02's 3rd and 4th really woke up! I'm completely satisfied with it and it's completely worth any mpgs less. Remember.. With Mustangs, we more or less base ourselves on smiles per gallon. :p
Ha! Love it
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Old 09-28-2011, 06:15 AM   #11
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Re: 4.10 Gear Speed/RPM Video

GOOD Post.
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Old 09-28-2011, 07:46 AM   #12
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Re: 4.10 Gear Speed/RPM Video

another thing to point out: from my research if your ever gonna supercharge with a roots or twin screw type blower, 4.10s are gonna be pretty brutal. no 1st gear at all lol. idk about centrifugal sc's tho
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Old 09-28-2011, 09:19 AM   #13
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Originally Posted by tigercrazy718
another thing to point out: from my research if your ever gonna supercharge with a roots or twin screw type blower, 4.10s are gonna be pretty brutal. no 1st gear at all lol. idk about centrifugal sc's tho
Good point. It's said that if you go forced induction at all, really, then you should stick with something more like a 3.55 or even stock 3.27.
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Old 09-28-2011, 10:11 AM   #14
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Even with my vortech and 373s first and second are useless. I run nitto 315 widths on rear and still dont hook. I drive around town always startin in second gear for normal driving. I love the gears and the way they pull but if going big power they hurt a little
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Old 09-28-2011, 11:36 AM   #15
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Re: 4.10 Gear Speed/RPM Video

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Even with my vortech and 373s first and second are useless. I run nitto 315 widths on rear and still dont hook. I drive around town always startin in second gear for normal driving. I love the gears and the way they pull but if going big power they hurt a little
luckily since im missing 2 cylinders when i get a blower i wont have that problem lol
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Old 09-28-2011, 12:33 PM   #16
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Re: 4.10 Gear Speed/RPM Video

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Everyone seems to be really scared about changing out their stock 3.27 gear with a steeper gear like 3.73, 3.90, or 4.10. I elected to go big or go home and went with the 4.10s. And I'm so happy I did! Here's a video to put to rest all the stories about how terrible the gas mileage is and how much it affects your car... This is a video of me on the interstate running at 65mph, 70mph, 75mph, and finally 80mph. The speedometer and RPM gauge is all correct thanks to my tuner.

Don't fear the gear! 4.10 is amazing!

4.10 Gear RPM/Speed Example Video - YouTube
Also I would like to add that for an automatic-equipped vehicle, the RPMs with the 4.10 gears will be 100-200 lower than a manual-equipped vehicle. This kinda goes for all gears. So while a popular choice for manual cars is a 3.73, people whom have autos will feel a similar gain in power from a gear much steeper like a 3.90 or 4.10.

---------- Post added at 01:33 PM ---------- Previous post was at 01:25 PM ----------

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Also I would like to add that for an automatic-equipped vehicle, the RPMs with the 4.10 gears will be 100-200 lower than a manual-equipped vehicle. This kinda goes for all gears. So while a popular choice for manual cars is a 3.73, people whom have autos will feel a similar gain in power from a gear much steeper like a 3.90 or 4.10.
And one more thing! People say that the steeper gear you get, the less top-end you'll have in terms of MPH. This is completely false in so many ways- especially if you have a brain and can think. With a relatively stock car, you reach 5th gear at around 105mph if you're going all the way through the RPM band. Then when you shift into 5th with stock 3.27s, your RPMs hit around 2k-2.5k. The powerband is around 3k+, but seeing as how 5th is an overdrive gear, it's very difficult for your car to get into peak RPMs around 4k-4.5k and you usually end up hitting maybe 110 then acceleration almost stops.

However, with 4.10s, at 105 I hit 5th gear and my RPMs are already right over 3k, and then soon they're over 4k and I'm going around 125, then at 5k I'm at 135, and I've gotten up to 143mph at around 5.5k. When I had stock 3.27 I was maybe getting 120 if I was lucky. With the steeper gears, the engine is allowed to work at a more efficient RPM and doesn't get bogged down.

So yeah... The only downside to steeper gears is:
1) Lower MPG(but only barely if you drive nicely)
2) You burn out a lot
3) First gear becomes pretty useless.

Upsides:
1)Accelerate like a bat out of hell (versus stock gears)
2) You burn out a lot
3) Your engine works at more optimal RPMs in pretty much every gear
4) City driving is easier because it takes less effort to start rolling
5) Passing on HWYs and Interstates is fun/safe again.
6) There are more, but I gotta get going to work. Lol Can't wait to drive my car!!
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Old 09-29-2011, 06:02 AM   #17
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Re: 4.10 Gear Speed/RPM Video

Good stuff/good Info, thanks for that Info.

As you have probably read, I have the 4.10's with an Automatic and I am thinking of getting the "Saleen" SuperCharger on mine, what's your opinion on that setup/choice?? I've read resently alot of opinions on Gears and SuperChargers, particularly the First and Second Gear being useless, do you think I will have that problem????

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Also I would like to add that for an automatic-equipped vehicle, the RPMs with the 4.10 gears will be 100-200 lower than a manual-equipped vehicle. This kinda goes for all gears. So while a popular choice for manual cars is a 3.73, people whom have autos will feel a similar gain in power from a gear much steeper like a 3.90 or 4.10.

---------- Post added at 01:33 PM ---------- Previous post was at 01:25 PM ----------



And one more thing! People say that the steeper gear you get, the less top-end you'll have in terms of MPH. This is completely false in so many ways- especially if you have a brain and can think. With a relatively stock car, you reach 5th gear at around 105mph if you're going all the way through the RPM band. Then when you shift into 5th with stock 3.27s, your RPMs hit around 2k-2.5k. The powerband is around 3k+, but seeing as how 5th is an overdrive gear, it's very difficult for your car to get into peak RPMs around 4k-4.5k and you usually end up hitting maybe 110 then acceleration almost stops.

However, with 4.10s, at 105 I hit 5th gear and my RPMs are already right over 3k, and then soon they're over 4k and I'm going around 125, then at 5k I'm at 135, and I've gotten up to 143mph at around 5.5k. When I had stock 3.27 I was maybe getting 120 if I was lucky. With the steeper gears, the engine is allowed to work at a more efficient RPM and doesn't get bogged down.

So yeah... The only downside to steeper gears is:
1) Lower MPG(but only barely if you drive nicely)
2) You burn out a lot
3) First gear becomes pretty useless.

Upsides:
1)Accelerate like a bat out of hell (versus stock gears)
2) You burn out a lot
3) Your engine works at more optimal RPMs in pretty much every gear
4) City driving is easier because it takes less effort to start rolling
5) Passing on HWYs and Interstates is fun/safe again.
6) There are more, but I gotta get going to work. Lol Can't wait to drive my car!!
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Old 09-29-2011, 11:06 AM   #18
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Re: 4.10 Gear Speed/RPM Video

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Good stuff/good Info, thanks for that Info.

As you have probably read, I have the 4.10's with an Automatic and I am thinking of getting the "Saleen" SuperCharger on mine, what's your opinion on that setup/choice?? I've read resently alot of opinions on Gears and SuperChargers, particularly the First and Second Gear being useless, do you think I will have that problem????

yup probably lol. u might need to switch back down to 3.55s
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Old 09-29-2011, 11:12 AM   #19
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Good stuff/good Info, thanks for that Info.

As you have probably read, I have the 4.10's with an Automatic and I am thinking of getting the "Saleen" SuperCharger on mine, what's your opinion on that setup/choice?? I've read resently alot of opinions on Gears and SuperChargers, particularly the First and Second Gear being useless, do you think I will have that problem????
Honestly with an auto you might get away with it.. Especially if you pick and choose your races.
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Old 09-29-2011, 11:51 AM   #20
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Re: 4.10 Gear Speed/RPM Video

Thanks Cole, and tigercrazy, i've heard and spoken to a few people, and they said that with my Automatic and the 4.10 Gears, that I would be OK.
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Old 09-29-2011, 12:13 PM   #21
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Thanks Cole, and tigercrazy, i've heard and spoken to a few people, and they said that with my Automatic and the 4.10 Gears, that I would be OK.
Yeah, like I said you should be able to get away with it. You're just going to have to learn how to control your car's acceleration from a dig. But that experience comes with time. It's gonna be a really fun car!
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Old 01-23-2014, 10:14 AM   #22
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I just swapped in 4.10's from the factory 3.27's. I have an automatic. I wanted 3.73's but my brother insisted I go at least a full turn higher to feel the difference. I do 2 hrs of highway driving every day. I can finally use my Overdrive.

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Old 01-23-2014, 05:33 PM   #23
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GOOD

That's good. I have absolutely no complaints with mine. Worlds of Fun to drive.
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Old 01-23-2014, 10:15 PM   #24
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Hey Cole you're running those 305/40R18s right? What's the revs per mile on those. My recent highway trip had me running 2700rpms in 5th (T45) on a 244/45R17 snow tire. 65 runs 2200ish.
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Old 01-24-2014, 06:10 AM   #25
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Hey Cole you're running those 305/40R18s right? What's the revs per mile on those. My recent highway trip had me running 2700rpms in 5th (T45) on a 244/45R17 snow tire. 65 runs 2200ish.

I haven't got to drive it much with the 305s because since getting them I parked it for a complete rebuild. But when I had a similar height 295 I was around the same RPMs. Except I was around 2.5k at 70-75. I cruise at 65 however and turn for around 2.1-2.2k pretty regularly. Doesn't really hurt the 'ole wallet bad at all. I didn't even notice the difference really. Haha
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Old 01-24-2014, 08:21 AM   #26
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I haven't got to drive it much with the 305s because since getting them I parked it for a complete rebuild. But when I had a similar height 295 I was around the same RPMs. Except I was around 2.5k at 70-75. I cruise at 65 however and turn for around 2.1-2.2k pretty regularly. Doesn't really hurt the 'ole wallet bad at all. I didn't even notice the difference really. Haha
Understandable. I was just curious because I hopped on the highway and hit cruising speeds and was quite surprised at the RPMs I was taching. The ease at which is hit those speeds was nice though
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Old 01-24-2014, 09:52 AM   #27
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Understandable. I was just curious because I hopped on the highway and hit cruising speeds and was quite surprised at the RPMs I was taching. The ease at which is hit those speeds was nice though

Yep. I'm happy with the pros vs cons.
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Old 01-26-2014, 01:47 PM   #28
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So I went on a nice cruise and decided to check my RPMs at each speed Cole did. I have a 245/45R17 tire but I'm not 100% sure how accurate my speedometer is right now, it might still be calibrated for the 315s. But here's some pictures I took while driving. I absolutely love my 4.10s by the way.
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Old 01-26-2014, 02:58 PM   #29
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There's nothing like 4.10's

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Old 01-26-2014, 05:32 PM   #30
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So I went on a nice cruise and decided to check my RPMs at each speed Cole did. I have a 245/45R17 tire but I'm not 100% sure how accurate my speedometer is right now, it might still be calibrated for the 315s. But here's some pictures I took while driving. I absolutely love my 4.10s by the way.

How are you liking them so far? It's fun ain't it?


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Old 01-26-2014, 06:10 PM   #31
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How are you liking them so far? It's fun ain't it?


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They're great! It's nice being able to row gears and not hitting some ridiculous speeds. I'm still trying to get adjusted with how often I need to shift
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Old 01-26-2014, 06:45 PM   #32
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They're great! It's nice being able to row gears and not hitting some ridiculous speeds. I'm still trying to get adjusted with how often I need to shift

You have stick right? Can you start out in 2nd?


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Old 01-26-2014, 06:48 PM   #33
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Originally Posted by CoolHorsey View Post
You have stick right? Can you start out in 2nd?


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Yes and I haven't tried
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Old 01-26-2014, 07:23 PM   #34
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Originally Posted by CoolHorsey View Post
You have stick right? Can you start out in 2nd?


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Yep. You can start out in second pretty easily. And you can also start out in first without using the gas pedal at all. Lol. Or at least my mustang can..
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Old 01-27-2014, 01:37 AM   #35
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I'd really like to see a difference of the 4.10 gears with a change in tire. I'll be getting 4.10s for my car soon (already ordered the gear kit) and i have 285/35-18, and later plan to upgrade to 305/40-18 tires, it would be cool to see the difference in rpm alone.
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