High numbered gears, also known as "shorter gears" will redline quicker and at lower speeds. These gears, in the off road world, are referred by those who gravitate more toward mudding, since you need the speed to keep your vehicle moving and tires spinning and biting. Low numbered gears, often called "taller gears" tend to be faster at highway speeds before reaching the redline. There are two types of gears out there for you to choose from low numbered and high numbered. Ok! I'm ready for new gears! But which ones are the right ones for me? Upgrading your gears ultimately gets your vehicles engine and drivetrain capabilities back to factory-like performance. Re-gearing to the proper ratio will allow your vehicle to move and function with less stress to the axles. Without gears, you are increasing the amount of force sent to the axles, which can cause a lot of breakage. Jeeps, trucks and 4x4 vehicles weren't designed to be Lamborghini-fast but they also weren't made to be slug-slow either. The harder your drivetrain needs to work, the slower your vehicle will move. Your driveshafts will turn slower while driving down the road, compromising your power and performance. Your tires diameter governs how hard your drivetrain needs to work in order to make your vehicle move. Off-roading and upgrading to larger tires changes to overall diameter of the tire, roll resistance, tire rotation and adds weight of the tires into the mix. Re-gearing can and will improve your vehicles top speed, fuel efficiency and performance. How will my vehicle benefit from new gears? **Photo Credit: Justin's Auto and Off Road in Norton, Ma I don't know about you, but I enjoy driving my lifted JK on the highway and still being able to keep up with the flow of traffic without my wallet or gas tank suffering. Once larger tires are added to the equation, your fuel economy, power and performance are compromised. When your driveshaft rotates, the pinion gear spins the ring gears which, in turn, spin your axle shafts, making your vehicle move. Your vehicles driveshafts, front and rear, connect to the axle shafts on the pinion gears. With 4.10 gears, the driveshaft would have to rotate approximately 4 times for your wheel to complete one revolution. Example- with 3.21 gears, your driveshaft would have to rotate approximately 3 1/4 times for your wheel to complete one revolution. This number in turn determines how many rotations your driveshaft has to make to spin your wheel once. Gearing of the axle is regulated by the amount of teeth in your ring and pinion gears. The factory gears are decided based on the year of your vehicle and the package it comes with. Once you bump up in tire size, this throws your drivetrain, speedometer, shift points and performance out of whack. Your drivetrain is originally geared to provide your vehicle with proper balance and torque. What do gears do? Why should I re-gear? When is the ideal time to re-gear? Where should I bring my vehicle for this service? And so on and so forth. There is a lot of useful information you should know of and consider when it comes to whether or not re-gearing is truly in the cards for your Jeep, truck or 4x4 vehicle. I'm sure you've heard fellow Jeepers and wheelers alike discussing gear ratios or gearing in general at some point in the past.
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