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Old 06-30-2013, 07:57 PM   #1
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Gears

What gears get the best gas mileage? I really want 4.1's but I heard that KILLS your MPG's. I want some giddy up but I also want good gas mileage
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Old 06-30-2013, 08:08 PM   #2
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I've got FRPP 4.10s they came with the car when I bought it and I absolutely love them. Amazing when you get on it. I average around 18 mpg with a mix of city and highway driving. I wouldn't want anything other then 4.10s
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Old 06-30-2013, 08:14 PM   #3
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There's a good read in the stickies section on gears. What sort of driving do you do? Highway, city, or a combination of both? A lot of guys on here love their 4.10s and you'll get great city gas mileage, but the highway mpgs usually drop a bit. I have 3.55s and honestly didn't feel a difference after I installed them.
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Old 06-30-2013, 08:15 PM   #4
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They got a real good thread about 4.10s I think this is the link

4.10 Gear Speed/RPM Video
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Old 06-30-2013, 09:34 PM   #5
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Originally Posted by JDF View Post
There's a good read in the stickies section on gears. What sort of driving do you do? Highway, city, or a combination of both? A lot of guys on here love their 4.10s and you'll get great city gas mileage, but the highway mpgs usually drop a bit. I have 3.55s and honestly didn't feel a difference after I installed them.
About 95% of my driving is highway
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Old 06-30-2013, 09:46 PM   #6
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About 95% of my driving is highway
Any set of gears that you put in will reduce your highway MPGs. To feel a noticeable difference you would need at least 3.73s, at least in my opinion.
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Old 06-30-2013, 09:50 PM   #7
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Any set of gears that you put in will reduce your highway MPGs. To feel a noticeable difference you would need at least 3.73s, at least in my opinion.
And I'm assuming when you say "noticeable difference" you're talking about acceleration? I mean obviously you can't FEEL your MPG's but I just want to make sure I'm understanding you correctly
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Old 06-30-2013, 09:59 PM   #8
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I've got FRPP 4.10s they came with the car when I bought it and I absolutely love them. Amazing when you get on it. I average around 18 mpg with a mix of city and highway driving. I wouldn't want anything other then 4.10s
i agree if you want giddy up 4.10's you dont have to burn gas if you dont want too, the biggest reason people use more gas with them is because they are so much fun, I wouldnt want any other gear, people always diss 4.10's but in reality u can get better mpg with them if you know what your doing, the engine doesnt work hard at all when in city traffic...

---------- Post added at 10:59 PM ---------- Previous post was at 10:56 PM ----------

and if you did the speed limit say 65-70mph on hwy you wouldnt drop but maybe 1 or 2 mpg i get almost 23 on hwy driving as fast as i want
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Old 06-30-2013, 10:01 PM   #9
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i agree if you want giddy up 4.10's you dont have to burn gas if you dont want too, the biggest reason people use more gas with them is because they are so much fun, I wouldnt want any other gear, people always diss 4.10's but in reality u can get better mpg with them if you know what your doing, the engine doesnt work hard at all when in city traffic...

---------- Post added at 10:59 PM ---------- Previous post was at 10:56 PM ----------

and if you did the speed limit say 65-70mph on hwy you wouldnt drop but maybe 1 or 2 mpg i get almost 23 on hwy driving as fast as i want
Ok, thanks a lot for the help! I really appreciate it!
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Old 06-30-2013, 10:04 PM   #10
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Originally Posted by brianw64 View Post

i agree if you want giddy up 4.10's you dont have to burn gas if you dont want too, the biggest reason people use more gas with them is because they are so much fun, I wouldnt want any other gear, people always diss 4.10's but in reality u can get better mpg with them if you know what your doing, the engine doesnt work hard at all when in city traffic...

---------- Post added at 10:59 PM ---------- Previous post was at 10:56 PM ----------

and if you did the speed limit say 65-70mph on hwy you wouldnt drop but maybe 1 or 2 mpg i get almost 23 on hwy driving as fast as i want
I absolutely agree with what you say there's times I get great MPG with 4.10s, then there's days I can't keep my foot off the skinny pedal and constantly on it bc they are fun. I find the pull and acceleration to be breath taking the way it pushes you back in your seat. It's all on how you drive it.
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Old 06-30-2013, 10:31 PM   #11
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Originally Posted by Rcmonaco View Post

And I'm assuming when you say "noticeable difference" you're talking about acceleration? I mean obviously you can't FEEL your MPG's but I just want to make sure I'm understanding you correctly
Yes I mean noticeable difference when driving.
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Old 06-30-2013, 11:31 PM   #12
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4.10's!! Makes you're car feel like a whole new machine
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Old 07-01-2013, 01:41 PM   #13
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Don't fear the gear. If you are not an ******* doing 90 on the highway you'll still get decent mileage. I went from 24 mpg on my 3.08s in my Cobra to 19-21 with 3.73s depending on how I drove it. 18mpg is easily possible with 4.10s, just keep it at 70. I get 20mpg hand calculated city/hwy mix on the blue 98 in my sig and that has 3.73s in it.
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Old 07-01-2013, 05:08 PM   #14
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I want 410 but I'm just afraid of losing top end


I spanked a 3V with almost full engine bolt ons and 410s with just my 3:55s , that's what makes me scared lol
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Old 07-01-2013, 06:27 PM   #15
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Your mach makes more power than the 3v does. Your top end will be fine you can get past 140mph with 4.10s no problem especially with that .62 overdrive gear.
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Old 07-01-2013, 08:05 PM   #16
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I still have plenty of top end with my 4.10's
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Old 07-01-2013, 09:50 PM   #17
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Originally Posted by Rcmonaco View Post
What gears get the best gas mileage? I really want 4.1's but I heard that KILLS your MPG's. I want some giddy up but I also want good gas mileage
I did 24mpg in my 99 cobra with 4.3 gears in both city and highway driving.
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Old 07-01-2013, 11:56 PM   #18
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Your mach makes more power than the 3v does. Your top end will be fine you can get past 140mph with 4.10s no problem especially with that .62 overdrive gear.
I just wonder what ill top out in 4th gear

I really don't wanna worry about going to 5th unless I'm cruising
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Old 07-02-2013, 08:26 AM   #19
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I have 4.10s and honestly wish I had 4.30s.
I get 23 easily highway and still average 18 city. Of course, I also got it down to 8 one day playing with a Challenger R/T with the world's shttiest 3-pedal driver, but that was worth it.
Slow, I shift at 70 in 4th at about 3,300 when in merging into the highway. I'd bet I could hit 100-110 at the least and I can't rev as high as you can.
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Old 07-02-2013, 09:34 AM   #20
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Yep don't fear the gear, no idea why ppl are so worried about top end. Just shift into 5th or don't worry about it. If you are a road racer and have to worry about it then you won't be running 4.10s anyway. If you are 1/4 racing then you should run a gear that'll just about hit redline when you cross the marker in 4th or whatever the last gear before OD is if you are auto.
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