What rear end?
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What rear end?
Hey guys i have a 2008 f-350 DRW with an 4.30 gear. I want to lower the gear ratio The problem is what rear end is in there is it a dana 60 or 70 etc my local ford dealer has no idea we even tried using the axle tag but no luck. I am trying to improve gas millage i have a v-10 let me no what really works Thanks
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Rear gear
Thanks guys on the rear end When lowering the gear ratio do u have too change the carrier too? Or just the gear? Thanks again for all of your help Has anybody done a cold air kit or cat back exhaust and seen any improvements in fuel mileage what about hand held tuner? Again thanks
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From: Frederick MD & missing AK
I think the carrier break on a D80 is 3.73/4.10. What gears were you planning?
FWIW, I am assuming you bought a v10 duallie to tow/haul some heavy loads. The 4.30 is the best ratio for that. Going to a higher gear ratio will degrade your tow quality.
FWIW, I am assuming you bought a v10 duallie to tow/haul some heavy loads. The 4.30 is the best ratio for that. Going to a higher gear ratio will degrade your tow quality.
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From: Frederick MD & missing AK
Maybe a different truck would be a better option for you. However, you can make the gear change and still have 4wd, you will just have to change gears in the front axle too. Going to 3.54 gears will require you to use a different carrier though, which will make the swap more expensive.
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From: Frederick MD & missing AK
I am not sure, but I dont think the higher gears will have a ton of effect on your MPG's. Some effect for sure, but it may not be enough to make it worth it. Gear swaps can be expensive, especially at the dealership. Not to mention that your resale value on that truck will go in the tank, if that matters to you.
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rear gear
Thanks guys I owe too much on this truck and getting rid of a gas pig right now is not easy. i dont tow anything my plan was to build up my race car and be prepared to tow it around well with the economy being **** those plans have changed . Thanks again for everyone's help
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From: Wayyy NoCal, USA
I'm with racinghoss - I don't think you are going to see enough mpg improvement to come even close to justifying the expense - especially if you pay someone to do the work. You might see 1/2 to 1 mpg at very best. It may take 100,000 miles just to recover the cost, let alone see gains.
Bottom line: Pushing GIANT chipped bricks through the air takes a lot of power, and fuel. The best (only?) way to gain significant mpg in these monsters is to slow down. Power required goes up at the CUBED of the speed increase. IE, double the speed requires 8X the fuel. 10% speed increase requires 33% more fuel.
Also, accelerating this much mass takes a lot of fuel. Try to avoid stops (start decelerating well before red lights and try to time them going green), and drive like you have a rotten egg between your foot and pedal.
Bottom line: Pushing GIANT chipped bricks through the air takes a lot of power, and fuel. The best (only?) way to gain significant mpg in these monsters is to slow down. Power required goes up at the CUBED of the speed increase. IE, double the speed requires 8X the fuel. 10% speed increase requires 33% more fuel.
Also, accelerating this much mass takes a lot of fuel. Try to avoid stops (start decelerating well before red lights and try to time them going green), and drive like you have a rotten egg between your foot and pedal.
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From: muskegon mi.
the best way to improve mpgs is in your right foot....I can get 3 4 mpgs by driving like an old blind man the truck is geared so it can have the large towing cap if mpgs is your thing right now sell it...... that truck you have is hard to find( try to find one like yours)bet you can at least break even