5.0 on 4:10 Gears, How Am I Gonna Like It? | Ford Explorer Forums

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5.0 on 4:10 Gears, How Am I Gonna Like It?

RandomNerd2000

Explorer Addict
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Year, Model & Trim Level
00 5.0, 01 4.0.
So, it's come to mind that my 2001 Eddie Bauer I'm gonna V8 swap has 4:10 rear end gears, and I haven't been able to decide if I'm gonna like it or dislike it in comparison to 3:73 gears, I'm running 245/75R16 tires on the Eddie Bauer, so it's a tad taller than the stock tires for the truck, so what am I looking at exactly?
 



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So, it's come to mind that my 2001 Eddie Bauer I'm gonna V8 swap has 4:10 rear end gears, and I haven't been able to decide if I'm gonna like it or dislike it in comparison to 3:73 gears, I'm running 245/75R16 tires on the Eddie Bauer, so it's a tad taller than the stock tires for the truck, so what am I looking at exactly?
Exactly, you will be looking at an increase in engine speed of just under 10%, so, take whatever your tach reads now and at 1/10 of what it says. Not a huge amount of difference, really. For average, non-neck breaking acceleration, you might actually at part-throttle take-off burn less fuel, but in the end, cruising the highway, it will use more fuel with 4.10s. imp
 






you will have great take off and acceleration, but poor fuel mileage,,

yes the ratio change is not much,. but been there , done that even with a 4.0 it made a big difference on the highway,, and i ran it with 31x10.5 tires, they were bigger then the 245's,,,
 






im running a 245 tall tire, did the v8 swap but with a 4406 t case and it has 4.10 from factory. at around 75mph im buzzing around 2500-2600 and around 2100-2200 at 60. before i really started screwing with the motor i would get (going off the message center) a average of 19 on the highway
 






yup, I have 4:10's on my rig and have NO regrets. I get at 60 between 19-21mpg depending on the wind or uphill, well you get it. If I take the back roads so that I can keep it under 50 my mileage goes up to 21-25mpg. I am running slightly oversize tires 270/65/16. There is no lugging down under a load on take off. I would love to buy a super charger for mine but just need to spend money on my 6v92 rebuild kit so I can get my motorhome running again. I don't believe you will regret keeping the 4:10's, unless you plan on doing a lot of freeway driving and not much city driving,(stop and starting). My 2 cents worth.
Loquetus
 






My driving is half highway running anywhere from 65MPH to 80MPH, and half city, sounds like I'm gonna enjoy the truck a lot, I did always like the 4.0 on the 4:10 gearing, it was enjoyable, I am probably going to resize the tires when this set is worn completely out, since these are more narrow than stock and look a tad outta place, I'll likely go to a 265/70R16 or back to the stock size.
 






im running a 245 tall tire, did the v8 swap but with a 4406 t case and it has 4.10 from factory. at around 75mph im buzzing around 2500-2600 and around 2100-2200 at 60. before i really started screwing with the motor i would get (going off the message center) a average of 19 on the highway
Nothing really wrong with 19. Keep yourself happy! imp
 






Those 245/75R16 tires are 30.5" tall, just a 1/2" taller than stock 255/70/16's. The speedometer is most accurate with 30" tires and stock gearing, so you won't be far off.

4.10/3.73x30/30.5= 1.08 ratio change overall with those 245/75R16 tires. The speedometer will read about 8% faster than actual speeds. A taller tire will slow that down, but the tire changes are much less than the gearing changes. A 265/70/16 is also a 30.5" tire.

You'll like those 4.10 gears. I'm going that route next year too, but with a close ratio 4R(1st/2nd gears from an AODE)(That'll make it like the gears are 3.5's in 1st and 2nd).
 












I changed to 4.10 from 3.73 along with a 5 speed and 4406. 265/70/17 tires. It does spin pretty high on the freeway but the power is great. I can cruise around town in 5th no problem, and I don't have to downshift to pass on the highway. My combined mileage is in the low teens unfortunately, but 80% of that is city.
 






Some points:

1.)Don't fear the gear
2.)It's easier to change tires than gears
3.)The more enjoyable your rig is to drive=the more you'll have your foot in it=the less mpg will matter
4.)Don't fear the gear
 






Don't fear the gear is right. You won't regret 4.10's. One of the best mods I did to my truck, which came with 3.27's. No more transmission hunting or downshifting on hills. Just effortless acceleration up them.
 






Don't fear the gear is right. You won't regret 4.10's. One of the best mods I did to my truck, which came with 3.27's. No more transmission hunting or downshifting on hills. Just effortless acceleration up them.

Stop it you guys, that's gonna make me think of a swap from 4.10's, to a 4.30 or 4.56 gear.
 






They already got me tempted to swap my 2000 that's a 5.0 to a set of 4:10 gears, this sounds purely awesome so far.
 






They already got me tempted to swap my 2000 that's a 5.0 to a set of 4:10 gears, this sounds purely awesome so far.

I suggest leaving the gearing until the very last, and then decide. If you can increase the power enough, the gearing needs to go the other way as you gain speeds. Ask Tim and John with their very fast blown trucks, if they need so much gear as when they started.

Faster cars need less gear, so if you can bump the power enough, the 3.73's will still be fine. That's my hope for when I swap my V6 to a V8, that the new 306 will have plenty of power for my gears(and the close ratio 4R). I'm aiming to add 75hp if it works out as it should.
 






Only a relatively small handful of people actual go so far as to installing a blower or a cammed stroker in their explorers. Most aren't looking to drop $5,000+ dollars and a decade of headaches and busted knuckles into their 20 year old 150,000+mile daily driver they picked up for $1500-$4000. Most are just looking for a couple bolt ons that will give them results for their hard earned money while giving them the least hassle. Numerically speaking, the 2nd gens with a 3.73 gear and 30inch tire is the same as a foxbody with 3.27's and a 26inch tire. Perfect for max all round mpg but not for performance. Any hotrodder worth his salt will tell you gears should be the first thing to do if you want to make a stock or mild bolt-on car go quicker. Unlike sport/muscle/pony cars, we have the ability to put much larger (or even smaller) tires. So you could effectively put steeper gears and have two set I(or three of differently size and type of tires depending on if you want to go off roading, or daily driving street mpg or stickier wider tires to hook and go fast from a stop or whatever. Before people burn up $1000 on aftermarket ignition systems, "CAI's", intake spacers, roller rockers etc, they should drop in gears, a shift kit and a muffler that that makes the noise they like and a dyno tune from a ford specialist. Just those 4 things would transform any truck and are the best bang for the buck and the least headache. Installing a power adder or building a more capable motor in a 2nd gen is a bridge few have the time, money, patience or skill to cross.
 






^
I
I
I
that. all the crap i have done to my truck, in the short run has been a headache. not gonna lie, but when you hit the loud peddle it makes the headache worth it. that and dusting a mustang, camaro or challenger at the lights is well worth it.
when i go to the track, i do run a smaller tire diameter tire (a 225 vs 245) just for the reason that i can get out of the hole faster, and when i reach the lights at the end i am at red line. you wouldnt think running a smaller tire would make a difference, but it does.
 






Stop it you guys, that's gonna make me think of a swap from 4.10's, to a 4.30 or 4.56 gear.
Just keep "thinking"; further action may be over-ruled by your own common sense, given time. imp
 



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Stop it you guys, that's gonna make me think of a swap from 4.10's, to a 4.30 or 4.56 gear.

I had a high school friend who put 4.56 gears in his Cutlass like the one pictured below. High RPMs on the highway, but stoopid fun in town. I remember him stomping on it driving down all our main street, stashed it into his parent's garage, and then watching the small town cops swarming the area while we kicked back in his back yard drinking beer and laughing...


2012-12-31-1971-Cutlass-Supreme-1-228-640.jpg
 






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