1. Check the owner's manual. The owner's manual should list the gear ratio of your truck.
2. Look for a sticker on the differential cover. The differential cover is located under the rear of your truck. There may be a sticker on the differential cover that lists the gear ratio.
3. Ask your dealer. If you can't find the gear ratio listed in the owner's manual or on a sticker on the differential cover, you can contact your dealer and ask them.
4. Count the teeth on the ring and pinion gears. If you are comfortable working on your truck, you can remove the differential cover and count the teeth on the ring and pinion gears. The gear ratio is the number of teeth on the ring gear divided by the number of teeth on the pinion gear.
Here are some examples of gear ratios and what they mean:
* 3.73:1 This is a common gear ratio for trucks that are used for towing or hauling. It provides good low-end torque, but it may sacrifice some fuel economy at higher speeds.
* 4.10:1 This gear ratio is better for trucks that are used for off-roading or climbing steep hills. It provides even more low-end torque than the 3.73:1 gear ratio, but it may sacrifice even more fuel economy at higher speeds.
* 4.56:1 This gear ratio is best for trucks that are used for rock crawling or other extreme off-road activities. It provides the most low-end torque of all the gear ratios, but it may sacrifice a significant amount of fuel economy at higher speeds.
