Looking for an answer to the question: Are 3.55 or 3.73 gears better? On this page, we have gathered for you the most accurate and comprehensive information that will fully answer the question: Are 3.55 or 3.73 gears better?
There are obvious limitations in that a ratio of say 10:1 is illogical in rear end gears . The impact would be that the engine would run out past its maximum rpm limits. Potentially damaging the engine due to valves bouncing and the pistons and rods looking for a way to make their way out of the engine block.
There won`t be a whole lot of a difference between the 2 ratios. I’d say 355 for the street it’s a good all round.I’m running 331 with a 402 and it’s not enough for fun,I prefer 355’s. either gear will work fine. There won`t be a whole lot of a difference between the 2 ratios. Click to expand… The difference would be negligible.
Then you want a bigger number and the 3.73 gears will work better for you. Do you want higher speed and better fuel economy for driving? Then a lower number and the 3.55 gears will work better for you.
The difference in towing mpg between the 3.42 and 3.73 gears at highway cruise speed, under the same conditions, should be less than 1 mpg because of the slightly higher rpm running 3.73s. Vehicle speed actually plays a bigger role in fuel economy than engine rpm. Can I change my axle ratio?
Are 370 Gears good?
whether that’s an auto or manual, 3.70’s are fine. Rpm’s average 2300-2500 for me with 3.73 at around 70-75 mph and a t5 5 speed. however, if you’re running the stock trans and enjoy getting on the freeway at all, don’t add gear until you update to an overdrive trans.
Which rear end gear ratio is best?
The most popular rear end ratio in trucks today is the 3:55, which sort of averages towing power and fuel economy. This is a good ratio for the occasional towing or hauling individual. For a person who tows more often, and heavier loads, the 3:73 or 4:10 may be more appropriate.
Is a 3.73 gear ratio good?
FACT: A 3.73 axle ratio is ideal for towing heavy loads on flat terrain and will produce increased fuel economy during steady-state, long-distance highway driving.
Are 3.70 gears good?
whether that’s an auto or manual, 3.70’s are fine. Rpm’s average 2300-2500 for me with 3.73 at around 70-75 mph and a t5 5 speed. however, if you’re running the stock trans and enjoy getting on the freeway at all, don’t add gear until you update to an overdrive trans.
Is 3.55 or 3.92 better?
3.92 is about 10% lower than the 3.55 with the same size tire. With the same rearend ratio the standard 17″ wheels and tires are effectively about 6% lower geared than the 20″. So you can get about halfway between the two ratios depending upon what you choose for wheel and tire size.
What does 3.55 axle ratio mean?
The numbers 3.55 and 3.73 refer to Ford truck axle ratios. The axle ratio tells you the number of revolutions the drive shaft makes compared to the rear axle. For a 3.55 axle ratio, the drive shaft will turn 3.55 times for every one revolution of the tire.
What are 3.73 gears good for?
A numerically higher axle ratio provides a mechanical advantage to send more of the engine’s available torque to the rear tires (and front tires, in a four-wheel drive vehicle), but you pay the price at the fuel pump. So, a truck with optional 3.73 gears will tow a heavier trailer than one with 3.55 or 3.21.
Is a 3.55 axle ratio good for towing?
Normally, the 3.31 would get you better gas mileage, on highway. But, with the 3.55 you will get a bit more pulling power so less time at higher RPM to get your trailer moving and when going uphill. If most of your towing is flat highway, the 3.31 should do you fine.
Is 3.55 a good gear ratio?
BEST TOWING RATIO: In general, the best towing axle ratio for most of the post-2010 pickups is in 3.55 or 3.73. Those ratios provide very good acceleration with gas V-8s and diesels.
Are 3.55 gears good for towing?
But that gear ratio would most commonly be referred to as “3.55” or simply “three fifty-five.” … So, a truck with optional 3.73 gears will tow a heavier trailer than one with 3.55 or 3.21. But it will also use more fuel in all situations because the engine’s rpm will be higher.
What is the best gear ratio for speed?
In the real world, typical street machines with aspirations for good dragstrip performance generally run quickest with 4.10:1 gears. Lower gears are required if the car is very heavy, or if the engine makes its power at the upper end of the rpm scale.
Is 3.92 or 3.55 gear ratio better?
3.92 is about 10% lower than the 3.55 with the same size tire. With the same rearend ratio the standard 17″ wheels and tires are effectively about 6% lower geared than the 20″. So you can get about halfway between the two ratios depending upon what you choose for wheel and tire size.
What does a 3.55 gear ratio mean?
Technically, the number should be expressed as a ratio, such as 3.55:1, meaning the drive shaft turns 3.55 times for each turn of a wheel. But that gear ratio would most commonly be referred to as “3.55” or simply “three fifty-five.”
What is the difference between 3.55 and 3.92 gears?
3.92 is about 10% lower than the 3.55 with the same size tire. With the same rearend ratio the standard 17″ wheels and tires are effectively about 6% lower geared than the 20″. So you can get about halfway between the two ratios depending upon what you choose for wheel and tire size.
Is a 3.73 axle ratio good for towing?
A 3.73 ratio is suitable for regular light towing. If you plan on towing a fifth-wheel trailer or anything heavier than 5,000 pounds, you should consider a 4.1 axle ratio.
Is a 3.55 rear end good?
“Generally, if you have a higher numeric axle ratio – like a 3.55 – you’re going to have better startability and gradeability by getting the engine rpm up,” adds Dana Director of Product Planning Steve Slesinski, “but at highway speed, you really want to slow the engine revs down so you’re not wasting energy or fuel.”
Is 3.31 or 3.55 axle ratio better?
Normally, the 3.31 would get you better gas mileage, on highway. But, with the 3.55 you will get a bit more pulling power so less time at higher RPM to get your trailer moving and when going uphill. If most of your towing is flat highway, the 3.31 should do you fine.
What is a 3.92 gear ratio good for?
But opt for the higher 3.92 axle ratio and that same truck packs a higher towing capacity of 9,930 pounds. The extra towing capacity comes about because the increased engine spinning helps improve off-the-line acceleration and pulling power when carrying heavy loads.
Are 3.55 gears good for highway?
Well, if you plan on doing a lot of freeway driving, you don’t want to choose a gear that’s too low for your car because you’ll be going down the freeway at too high of an RPM. … Shorter gears (higher numbers) are much better suited for accelerating, such as 3.55, 3.73, 3.91’s, 4.11’s etc.
What is a good gear ratio for a street car?
If it’s a daily driver, chances are you’ll want to keep your gear ratio at 3.23 or below for optimal performance and lower cruising RPMs. For street and strip applications, a popular choice ranges between 3.42s and 3.90s, giving you that extra oomph on the track while maintaining a tolerable cruising RPM on the street.
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