4.10's or 4.56's with 33's? - Page 2 - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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  #26  
Old 07-22-2009
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is your speedometer calibrated to the tires? if not then if your speedo reads 70 your probably going close to 80
No its not, And I know its off. My brother figured it up (yes he is very smart) and he said its off by ~5 mph. Even with my stock tires it turned over 2500. Not sure what it was exactly though.
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  #27  
Old 07-22-2009
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i could see that with stock 30s and 4.10s, he has 3.73s and 30s
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  #28  
Old 07-22-2009
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Now you might be talking about a diffent truck, but my '03 turns over 2500 rpm with 33's at 70 mph.
stick or auto? is your speedo calibrated for the tire size? my 2001 auto is right at 2500 RPM at 70 with 4:56 gears.
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  #29  
Old 07-22-2009
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Patrick I didnt know you had 4.56s
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  #30  
Old 07-22-2009
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i could see that with stock 30s and 4.10s, he has 3.73s and 30s
i dont know a whole lot about this so beings i have a lower torque motor and i put in 4.56 would that compensate for 35's on the highway better then i 4.10's like speed wise would i loose alot doing the 4.56? if its the math part to figured it out i dont like math and i did do that lol
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  #31  
Old 07-22-2009
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Patrick I didnt know you had 4.56s
yeah i geared it almost right away after the lift and 33's. i couldnt stand how slow it was lol
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  #32  
Old 07-22-2009
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stick or auto? is your speedo calibrated for the tire size? my 2001 auto is right at 2500 RPM at 70 with 4:56 gears.
Its an automatic. I think it turns 2600 with the 33's with what the speedo says in 70. Im really going about 75 or so.
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  #33  
Old 07-22-2009
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i dont know a whole lot about this so beings i have a lower torque motor and i put in 4.56 would that compensate for 35's on the highway better then i 4.10's like speed wise would i loose alot doing the 4.56? if its the math part to figured it out i dont like math and i did do that lol
yes the ohv would be fine with 4.56s and 35s IMO. I had my SOHC with 4.56s and 35s and I was fine with it. I did alot of highway back then too. Worked great really. maybe a little slower than stock, not much.
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  #34  
Old 07-22-2009
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Its an automatic. I think it turns 2600 with the 33's with what the speedo says in 70. Im really going about 75 or so.
youre pretty close than, i dont really know how accurate these tachs are anyways.
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  #35  
Old 07-22-2009
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Originally Posted by zabeard View Post
yes the ohv would be fine with 4.56s and 35s IMO. I had my SOHC with 4.56s and 35s and I was fine with it. I did alot of highway back then too. Worked great really. maybe a little slower than stock, not much.
What kind of mileage would I get with 4.56s and 33's? Note: I am going to college next year and will be doing a lot of driving back and forth on the highway at 70+ mph.
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  #36  
Old 07-22-2009
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id say around 14-15 but every truck is a bit different.
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  #37  
Old 07-22-2009
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id say around 14-15 but every truck is a bit different.
just how u drive it too.
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  #38  
Old 07-22-2009
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id say around 14-15 but every truck is a bit different.
I dont even get that good now. And now, I dont drive like a manic. So... I might end up doing this to make up for some lost power. I just hope it will still run 68 in 4 low.
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  #39  
Old 07-22-2009
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why in 4lo? you should only need 4hi for that speed.


dont forget since your speedo is off so is your odometer. so your current mpg figure probably isnt right either.
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  #40  
Old 07-22-2009
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why in 4lo? you should only need 4hi for that speed.


dont forget since your speedo is off so is your odometer. so your current mpg figure probably isnt right either.
You didnt see my thread? lol I drag race in 4 lo. I guess I need to get my speedometer calibrated.
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  #41  
Old 07-22-2009
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What kind of mileage would I get with 4.56s and 33's? Note: I am going to college next year and will be doing a lot of driving back and forth on the highway at 70+ mph.
My sport trac (4.0L SOHC 4x4 auto 4.88's 33's with a roof basket and spare on top) got a solid 13-14mpg (calibrated dead on with gps), in town, at 55mph, or at 70mph. Never more, never less, lol. I would say you should be capable of 15mpg or better with 4.56 gears if everything is running well.
Pulling a heavy loaded 6x14 enclosed trailer the worst I got was 10mpg.
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  #42  
Old 07-22-2009
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Originally Posted by David N View Post
What kind of mileage would I get with 4.56s and 33's? Note: I am going to college next year and will be doing a lot of driving back and forth on the highway at 70+ mph.
i average 15-17 mixed city/ highway the lowest was 10 mpg hauling a trailer fully loaded and the highest was 22 mpg all highway at 70 mph.
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  #43  
Old 07-22-2009
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Originally Posted by brianjwilson View Post
I knew someone would know it off-hand.

4.10 - 32.5" tires, in O/D at 2225 RPM = 70 mph.
4.56 - 32.5" tires, in O/D at 2500 RPM = 70 mph.
4.88 - 32.5" tires, in O/D at 2650 RPM = 70 mph

And if the truck came stock with 3.73s and 30" tires, 4.10 gears would put it back to stock with 33s. But it doesn't account for the extra weight and drag.
With it only going up 150 RPM I would go with 4.88's.
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  #44  
Old 07-22-2009
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It's not much, but it will be more comfortable with 4.56 gears on the highway if he sticks with 33s, and get better mileage. 4.88s are fun around town and offroad though!
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  #45  
Old 07-23-2009
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'01 4.0 5spd manual: 4.88's and 35's = 18mpg going 75mph for 250mi in 5th gear turning right about 2800-3000 rpms. All highway. In town with mixed driving, right about 16.5 or so.

I must say...I'm VERY impressed with the numbers I've been pulling lately even with the a/c on the entire time and sucking in pretty hot air.


*ALL figures pulled from a properly tuned ScangaugeII. My truck thinks it's going 104% faster than it really is because of the gear change and tire change....ScangaugeII is calibrated at -4% speed(slows the speed shown on the gauge by 4% thus making it accurate).
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