Gears & Lockers
At Uncharted Offroad, we provide differential re-gearing and locker installation for Jeeps, trucks, SUVs, and 4x4s. Whether you’re running larger tires, looking for better trail traction, or planning a more capable build, we help you choose gearing and differential upgrades that fit your vehicle and driving needs.
The Right Gearing for
the Way You Drive
Tire size is an important part of choosing a gear ratio, but it’s only one consideration. Your engine, transmission, existing axle ratio, vehicle weight, and intended use all influence the decision.
We start by discussing your current setup and what you want to improve. Does your vehicle feel sluggish after installing larger tires? Are you looking for more controlled low-speed trail performance? Do you regularly carry camping equipment or tow a trailer?
Those details help us recommend a ratio that balances your performance goals with highway driving and everyday use.
Re-Gearing for
Larger Tires
Larger tires change your vehicle’s effective gearing and can affect acceleration, shifting, and drivability. Installing an appropriate axle gear ratio can help compensate for that change.
We help you evaluate your current tire size, future modifications, and available gear ratios before selecting parts. Planning the complete setup together can help avoid paying for work that no longer fits your goals after the next upgrade.
Already planning a lift? Discuss your intended tire size with us so we can consider suspension and gearing together.
Differential Lockers for Trail Traction
When traction varies between the wheels on an axle, a locking differential can help keep your vehicle moving. A locker connects the axle’s two wheels so they rotate together when locked, which can be useful on uneven terrain.
Choosing a locker involves more than selecting a brand. We consider axle compatibility, tire size, driving habits, and how much control you want over engagement.
Selectable lockers let the driver choose when to engage the locking function. Depending on the product, operation may use an air or electrical system.
Automatic lockers engage and release according to their mechanical design and driving conditions. Their behavior on pavement can differ from a selectable locker.
We’ll explain the options available for your vehicle and the supporting equipment required for the proposed installation.
Jeep, Truck & SUV Gears
and Lockers
For Jeep Wrangler and Gladiator builds, we discuss how gearing and traction upgrades fit your tire size, existing axles, and trail goals.
For trucks and SUVs, we also consider highway use, loaded weight, towing needs, and the balance between everyday driving and off-road capability.
Compatibility depends on the exact axle and vehicle configuration. Let us know your year, make, model, trim, and existing modifications so we can identify suitable options.
What Goes Into Planning Your Installation?
Vehicle and axle assessment
We identify the axle configuration, current gearing, existing differential, and condition of relevant components.
Gear ratio and locker selection
We discuss compatible options and explain how each fits your tire size, driving needs, and planned upgrades.
Supporting parts and equipment
The proposed work may include bearings, seals, installation hardware, or locker controls. Air-operated lockers may also require a compatible air supply.
Precision differential setup
Ring-and-pinion installation requires careful measurement and adjustment. Gear contact pattern, backlash, and bearing preload must follow the specifications applicable to the components being installed.
Break-in and maintenance guidance
We explain the installed components’ requirements, including applicable break-in procedures, lubricant specifications, and follow-up service.
A clear estimate
We outline the proposed parts and labor, any additional work identified, and applicable warranty terms before you move forward.
Gears & Lockers FAQs
How much does re-gearing or locker installation cost?
Cost depends on your vehicle, axle configuration, selected components, and whether the work involves one or both axles. Existing wear and supporting equipment can also affect the estimate. Contact us with your vehicle details and goals for a tailored quote.
What gear ratio do I need for 35-inch or 37-inch tires?
There isn’t one ratio that works for every vehicle running the same tire size. Your engine, transmission, current gearing, axle options, and driving needs all matter. We help you compare suitable ratios for your specific setup.
Do I need to re-gear both axles on a 4x4?
For a conventional 4x4 with driven front and rear axles, the axle ratios must be properly matched for four-wheel-drive operation. A ratio change generally involves re-gearing both axles. We confirm the requirements for your vehicle before quoting the work.
Can I install a locker while re-gearing?
Often, yes. Depending on the locker design and axle, combining the work can reduce repeated disassembly and setup labor. We can quote the upgrades together and explain any potential savings.
Do I need front and rear lockers?
Not every vehicle or driver needs both. The right approach depends on your existing equipment, terrain, budget, and traction goals. We can help you decide whether one locker or a front-and-rear setup makes sense.
What is the difference between a locker and a limited-slip differential?
A locker can lock the wheels on an axle together. A limited-slip differential manages differences in traction while still allowing wheel-speed differences, with behavior that varies by design. We can explain which options suit your vehicle and intended use.
Will re-gearing increase horsepower?
Re-gearing does not increase engine horsepower. It changes the mechanical gearing between the driveshaft and wheels, affecting how the vehicle uses the engine’s output. The goal is a ratio better suited to your tires and driving needs.
Is there a break-in period after re-gearing?
New ring-and-pinion gears generally require a break-in procedure. Follow the instructions for the installed gear set, including any restrictions on heavy loads or towing and any required fluid service. We’ll explain the applicable requirements when reviewing your installation.
Let’s Plan Your Gears & Lockers Upgrade
Have questions about gear ratios or locking differentials? Give us a call, send a message, or stop by Uncharted Offroad in Prescott. Tell us what you drive, your tire size, and what you want to improve, we’ll help you explore your options and put together a quote.
Have More Questions?
Have questions about gearing or installing lockers in your Jeep, truck, or SUV? Give us a call, send a message, or stop by our Prescott shop.