How does the gear ratio affect gas mileage?
How does the gear ratio affect gas mileage?
The lower the gear ratio, the more rpm required to maintain a given speed with equivalent tire sizes. While the gear ratio will have an effect on the actual fuel economy of your vehicle, your driving habits will offset any gains or losses. The actual difference between a 4.10 gear ratio and a 3.73 gear ratio at highway speeds is less than 200 rpm.
Which is better 3.42 or 3.55 gear ratios?
“The reason we [GM] offers the 3.42 and 3.55 ratios in our pickups and SUVs is those ratios offer the best fuel economy with a four-speed automatic transmission. If you want a truck that responds best to a heavy load or towing a trailer, then 3.73, 3.92, or 4.10 ratios will provide the best wheel torque at the lower engine speeds.”
Which is the best gear ratio for towing?
Red = Best Power, this will give you the best performance for towing power, but at the expense of your MPG. These calculations are assuming a manual transmission at 65 MPH with a gear ratio of 1:1. If you drive an automatic your RPMs will be slightly higher, and if you have overdrive your RPMs will be slightly lower. You have no items to compare.
How is the gear ratio of a truck determined?
Optional gear ratios affect the truck’s hauling capabilities, fuel economy, and overall drivability. One way to calculate gear ratio is to put your vehicle in neutral and raise the rear wheels off the ground by sliding a floor jack under the rear of the vehicle.
The lower the gear ratio, the more rpm required to maintain a given speed with equivalent tire sizes. While the gear ratio will have an effect on the actual fuel economy of your vehicle, your driving habits will offset any gains or losses. The actual difference between a 4.10 gear ratio and a 3.73 gear ratio at highway speeds is less than 200 rpm.
“The reason we [GM] offers the 3.42 and 3.55 ratios in our pickups and SUVs is those ratios offer the best fuel economy with a four-speed automatic transmission. If you want a truck that responds best to a heavy load or towing a trailer, then 3.73, 3.92, or 4.10 ratios will provide the best wheel torque at the lower engine speeds.”
Optional gear ratios affect the truck’s hauling capabilities, fuel economy, and overall drivability. One way to calculate gear ratio is to put your vehicle in neutral and raise the rear wheels off the ground by sliding a floor jack under the rear of the vehicle.
Red = Best Power, this will give you the best performance for towing power, but at the expense of your MPG. These calculations are assuming a manual transmission at 65 MPH with a gear ratio of 1:1. If you drive an automatic your RPMs will be slightly higher, and if you have overdrive your RPMs will be slightly lower. You have no items to compare.
