4.10 to 3.08 - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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  #1  
Old 06-16-2008
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4.10 to 3.08

just wondering how much difference would i notice from 4.10s to 3.08s in mpg on a 3.0 also would it become really slow .. my dad a ford service manager like 27 years experience said it would help the mpg alot and a guy got the gears from a mustang brand new too that he would give to me but im nervous about it hurting everything else with mpg gain any advice?
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Old 06-16-2008
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idk what it would do in terms of hurting things and of course this isnt a 3.08 but my 95 ranger 4x4 with a 3.27 in the rear didnt do too bad. i just ran stock size tires on it. got somewhere like 23 or 24 mpg's on the highway with the 4.0 V6, so i'm sure it'll help with gas big time. just down know if it'll hurt things
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Old 06-16-2008
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The 3.0 get better gas mileage in higher rpms. I think 4.10's are better for it. What will increase mileage is accelerating slower and driving slower in general.

My grandpa get 29 mpg city/highway with his 87 Grand Marquis (5.0) by driving like, well, an old man. Thats how you save the MPG.

Last edited by Dangeranger3; 06-16-2008 at 09:28 PM.
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Old 06-16-2008
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he's right, the 3.0L doesn't do that great in lower RPM's. Depending on the tire size I'd say 3.55's to 3.73's would probably fit you better.
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Old 06-16-2008
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yea smaller displacement engines do better at higher rpm. The engine does not have to work as hard to pull itself around since its in its powerband more often.
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Old 06-16-2008
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So the free 3.08s would be a bad idea thats kinda what i though too was thinkin like 373 but my dads friend was like hey i got a new pair of 3.08s and i was like ok haha but i most likely wont change from 4.10s unless its to maybe 3.73
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Old 06-17-2008
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im running 3.73s with 26 inch tires. puts me at a 4.12 gear ratio. i get 18 on average city/highway. and i have some get up and go too.
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Old 06-19-2008
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yea you'd lose probably 5-8 MPG at least by dropping to a 3.08.
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