Both combinations give roughly the same cruise rpms and final drive ratio and the best balance between efficiency and pulling power. For a person who tows more often and heavier loads the 373 or 410 may be more appropriate.
How To Select Proper Rear End Differential Gear Ratio Rear End Gears Rear Ended Wheels And Tires
Few people thought much about the rear end even though according to Visser it accounts for 20 to 25 percent of total aerodynamic resistance.
. The 33s are 110 percent of the 30s or 10 percent larger. A semi truck using a gear ratio of 226 would have good fuel economy and sufficient power for small tasks however it would lack a great deal of. If you have installed larger tires they rob performance and you would want to go to a lower ratio like a 456 or 488 depending upon your tire diameter.
If we have a 411 axle ratio a 30-tooth over a 22-tooth QC ratio being 13636 then. In fact the Ford F-150 which is considered the best-selling truck of all time offers trucks with a 3151 ratio at the lowest end of the spectrum. Measure your wheel base.
These are not the only ratios however. Count the number of teeth on the ring gear and the pinion. Measure from the center of your steer axle to the center of your rear drive axle.
What is a Rear End Gear Ratio. This will give you the axle ratio. Our Mission The driving force of our success is understanding the evolving needs of todays owner-operators and drivers.
The most popular rear-end ratio in trucks today is the 355 which sort of averages towing power and fuel economy. This is a good ratio for the occasional towing or hauling individual. To find the needed ratio we can multiply 410 by 110 percent.
If you are going to be taking your truck on long trips or using it as your daily driver for hauling groceries this is a good place to start. So when you buy your next new truck put a check mark next to the box that lists the optional axle ratio best suited for your driving needs and future upgrades. These ratios are determined by the number of teeth on the pinions which impact the number of turns the axle makes.
For instance the JL Wrangler Rubicon has 410 axle ratios in the front and rear which is different than the 345 axle ratios found in the less expensive Sahara and Sport editions. When you hear car drivers refer to numbers such as 3081 3731 or even 4101 they discuss the ring-and-pinion gears ratio within the rear axle. Rear-end drag results from a low-pressure zone that in effect pulls the truck backward.
If getting the best fuel economy is priority then choose the lowest numerical number offered such as 308 323 or 331. When you multiply the two ratios it equals the final drive ratio. Our Tribe The Trucking Tribe is a group of people with a mission to do the hard work continue their education improve their health and well-being and achieve success in their.
9 DETROIT LOCKER. Dont use the gross weight figure thats in your truck manual. Trucks equipped with 8- 9- or 10-speed automatics may work well with 331 ratios as the new transmissions have lower 1st and 2nd gears than the old 4- 5- and 6-speeds helping offset the axle ratio acceleration deficit.
To find this number we divide the tire circumference by the drive ratio. We need the static weight which means youll have to weigh the front of your truck. Many off-road enthusiasts choose to upgrade their axle ratios for performance benefits.
8 TRACK LOC. Our mission is to provide innovative solutions for the challenges they face. Most class 8 semi trucks have a gear ratio of between 226 and 3361.
9 TRACK LOC. A single axle in texas can carry 25000 pounds but a tandem two axles in a group can only carry 46000 pounds so 23000 per individual axle in. Axles in the axle groups are almost always given a lower weight per axle than if they were single axles eg.
Method 1 requires that you take apart your differential but there many be an easier way. The standard axle ratio found in a GMC truck or SUV has been carefully selected according to the vehicles specific body style and engine in order to provide the best all-around mix of performance towing strength and efficiency. Weigh the front steering axle of your truck.
For instance the 3421 ratio included on many Canyon V-6 and Sierra 1500 models offers a good all-around blend. Most automobiles use gear ratios in the drive axle and the transmission to multiply power. That said if you regularly tow heavy trailers.
Much has changed over the past 5 years or so with axle ratios. However there are some downsides to going larger when it comes to axle ratio. 8 DETROIT LOCKER.
I recommend 3731or 4101 ratios for those who regularly tow heavy trailersand as I said above 410s for anyone going to larger tires. Divide the number of the ring gears teeth by the number of the pinions teeth. If you have a 342 rear end ratio and need more towing power you would switch to a 410 ratio.
Most fleets today opt for either a 355-58 rear end with a 73-74 OD top gear or 264 rear end with a direct drive top gear. When the air flow reaches the rear of the truck it cant stay attached to the vehicle Visser says.
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