Frequently Asked Questions

Regearing is the process of replacing your differential ring and pinion gears with a different ratio. When you install larger tires, they effectively raise your gear ratio, reducing engine RPM and power. Regearing restores factory performance, improves fuel economy, and reduces transmission strain.

Check your vehicle door jamb sticker, glove box sticker, or differential cover tag. You can also count driveshaft rotations: jack up the vehicle, mark the driveshaft and tire, rotate the tire one full revolution, and count how many times the driveshaft rotates. That number is your gear ratio.

It depends on your factory tire size and gear ratio. If you are going from 30" to 33" tires, regearing is optional but recommended. If you are going from 32" to 33", you may not notice much difference. Use our calculator for a precise recommendation.

For most trucks, 4.56 or 4.88 gears work well with 35" tires. Heavier trucks or those used for towing may benefit from 5.13 gears. Your factory ratio, engine power, and driving style also matter.

Regearing typically costs between $1,500 and $3,500 depending on your vehicle, labor rates, and whether you need additional work like driveshaft balancing. Get quotes from local shops for accurate pricing.

Regearing may void your powertrain warranty, depending on your manufacturer and warranty terms. Check with your dealer before proceeding. Aftermarket gears are generally not covered by factory warranty.

Regearing requires specialized tools and expertise. It is not recommended as a DIY project unless you have significant mechanical experience. Professional installation ensures proper setup and longevity.

Crawl ratio is the combined gear reduction from your transmission and transfer case multiplied by your differential ratio. Lower crawl ratios (under 40:1) provide better low-speed control for off-roading and rock crawling.

Proper regearing can improve fuel economy by keeping your engine in a more efficient RPM range at highway speeds. However, if you regear too aggressively, you may see worse fuel economy due to higher engine RPM.

The ring gear is the large gear attached to the differential case, while the pinion gear is the smaller gear driven by the driveshaft. Together, they determine your gear ratio and how power is distributed to the wheels.

Yes, some vehicles allow different ratios front and rear, especially in 4WD trucks. However, this can cause driveline stress and is generally not recommended unless specifically designed for your vehicle.

Professional regearing typically takes 4-8 hours depending on your vehicle and whether additional work is needed. Some shops may take longer if they are busy or if complications arise during installation.