Want to install 3.73 rear end - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 04-27-2013
patkelly1336's Avatar
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Want to install 3.73 rear end

I don't know much about drivetrains or motors as some of you know. But I have decided I want to remove the 4.10 rear end I have and install a set of 3.73 rear ends so I have better acceleration and better fuel economy. I currently run about 10.9 MPG on my 2008 Ranger XLT 4x4 - I have a Flowmaster exhaust system, K&N Intake, and diablosport programmer setup, it makes about 30 more ponies than it does stock (stock - 207 hp) (now about 237 hp) (4.0L SOHC V6). My acceleration at the track is a joke until I hit around 60MPH and get into second. I will post a video soon of my track acceleration.
All I want to know is:
1. How much will it cost to remove 4.10 and install 3.73
2. Is it worth it
3. Or should I just buy another Ranger that has 3.73...

Thanks all!
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Old 05-03-2013
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You realize your acceleration will decrease with 3.73s right?
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Old 05-03-2013
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What are you doing to get 10.9MPG? I have a 4:10 in my 3.slow and even gunning it all the time I got at least 13 MPG. Though, If you baby it like I'm doing now, it will fix the MPG issue because I'm currently a little under 3/4 tank and have 109 miles to it. Btw, a 3:73 will definitely reduce your acceleration because you will have a lot less torque with a 3.73 than a 4:10.
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Old 05-03-2013
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AC is on for 10.9 MPG - Plus the power programmer I use, and some mods i have
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Old 05-03-2013
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seriously?

i have a 4.0 sohc, tuner, intake, cat back, plugs, wires, e-fan, 4.56 gears, and 33" tires. i get 18-24mpg city/highway.

something is wrong with your truck if your getting 10mpg.

if you want a better quarter mile time, buy a mustang, these trucks arent fast.
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Old 05-03-2013
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Well I live in Wisconsin and I haul stuff a lot as well, and I go cruising on the weekends which typically involves horsepower showdowns...if you catch my drift. But do you guys think if I upgrade the coil, plugs, wires, injectors, maybe that is my problem?
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Old 05-04-2013
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If it doesn't fix it, it will sure help out. Be sure to check your fuel filter too. If you really want to fix the lack of power issue, just check into doing a V8 swap. I know a guy who just replaced the whole front end of his Ranger with one from an Explorer and connected the wiring, fuel line, and drive shaft.
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