Jeep Regear, Lockers & Axle Work for Nashville & Middle Tennessee

With big tires must come gears. If your Jeep feels flat since you went to 35s or 37s, the transmission keeps hunting on Nashville's interstate hills, or it struggles to hold speed with a trailer, gearing is usually the reason. Wreckless 4x4 handles every part of the driveline for Jeep owners in Nashville and Middle Tennessee: regears, lockers, axle trusses and full axle swaps.

Why Bigger Tires Need New Gears

Your axle ratio (for example 3.45, 3.73 or 4.10) sets how many times the driveshaft turns for each turn of the tire. Install a taller tire and each turn of that tire covers more ground, so the engine turns more slowly at any given speed. It's as if the factory ratio got taller. The result is familiar: slower acceleration, more downshifting, less pull on grades, and a speedometer that reads low until it's recalibrated.

A regear swaps the ring and pinion in both axles for a numerically higher (deeper) ratio, bringing engine speed back to where the engine and transmission were designed to work. Done right, a lifted Jeep on big tires can feel as responsive as it did stock, or better.

Signs Your Jeep Is Under-Geared

• It's slow to accelerate from a stop or when merging onto I-40 or I-65

• The automatic transmission keeps shifting up and down on hills and won't settle into top gear

• You need much more throttle just to hold highway speed, especially into a headwind

• It struggles with a trailer or a loaded overland setup

• Crawling off-road takes too much throttle or clutch slipping to stay in control

• Fuel economy dropped noticeably after the tire upgrade

If several of these sound familiar since you moved to bigger tires, gearing is the likely cause and the first thing worth looking at.

Choosing a Ratio

There's no single right ratio for every Jeep. The right choice depends on:

• Tire size, now and what you plan to run later

• Transmission: automatic or manual, and its gear spacing

• Engine: a Hemi-swapped Jeep makes far more torque than a stock V6 and may need a different ratio

• Use: daily highway driving, towing, overlanding weight or rock crawling

• Front and rear must match, so both axles are geared together

We'll go through these with you and recommend a ratio for your build.

Lockers

A typical open differential sends power to the tire with the least traction, which is why a Jeep with one wheel in the air can stop moving. A locker locks both wheels on an axle together so they turn at the same speed, and that keeps you moving on rocks, ledges and off-camber climbs. Selectable lockers can be switched on for the trail and off for the street. Since installing a locker means opening the differential, it's efficient to do it at the same time as a regear. We'll help you decide whether you want front, rear or both.

Axle Trusses and Axle Swaps

Big tires, lockers and extra power put more load on axle housings. An axle truss reinforces the housing to help resist bending. When a build has outgrown the factory axle altogether, for example with very large tires or the torque of a Hemi conversion, an axle swap to a stronger assembly may be the better path. We'll talk through the options for your tire size, power and use.

Planning the Whole Driveline

Gears rarely stand alone. They're tied to your lift and suspension, your wheel and tire package and, for many of our customers, a Hemi conversion installed by an authorized AMW installer. Planning these together avoids paying twice, for instance regearing for 35s and then again when you move to 37s. Tell us where you want the Jeep to end up, not just what you want this month.

Serving Nashville and Middle Tennessee

Wreckless 4x4 is at 711 Tennessee Blvd, Lebanon, TN 37087, about 31 miles east of downtown Nashville on I-40, and about 33 miles from Murfreesboro via I-840. We work by appointment, Monday through Friday, 10am to 5pm Central.

Ready to get your power back? Call (833) 426-4364 or request a quote. Tell us your Jeep, current gear ratio if you know it, tire size and how you use it.

Frequently Asked Questions

When do I need to regear my Jeep?

Owners usually consider a regear when they move to noticeably larger tires, often 35 inches or more, and the Jeep feels sluggish, downshifts a lot or struggles on hills or when towing. We'll look at your tire size, drivetrain and use and tell you whether a regear makes sense.

Can you install lockers at the same time as gears?

Yes. Both jobs involve the differential, so many owners do them together. We handle regears, lockers, axle trusses and axle swaps.

Do you regear both axles?

Front and rear axle ratios must match on a four-wheel-drive Jeep, so a regear includes both axles.

What gear ratio should I run?

It depends on tire size, transmission, engine and how you drive. We recommend a ratio for your build after talking it through with you.

Do I need new gears after a Hemi swap?

A Hemi changes the torque available, so the best ratio may differ from a V6 Jeep on the same tires. We'll factor your AMW package into the gearing recommendation.

Where is Wreckless 4x4, and when can I visit?

Our shop is at 711 Tennessee Blvd, Lebanon, TN 37087, about 31 miles east of downtown Nashville via I-40. Visits are in person by appointment only, Monday through Friday, 10am to 5pm Central. Call (833) 426-4364 (833-426-HEMI) or email sales@wreckless4x4.com to book.