Best Gear Ratio For Running 37's On The Jeep Wrangler JK (4.88 vs 5.13) | Inside Line

Changing the differential gears in your Jeep Wrangler is the absolute best way to compensate for running a taller tire. It will help you regain lost performance, fuel economy, and reduce the strain on your engine and transmission significantly. In this video, I'll break down what I went with the ratio I did and what I recommend depending on the details of your Jeep. Nitto Trail Grappler: https://www.nittotire.com/light-truck-tires/trail-grappler-mud-terrain-light-truck-tire/ Revolution Gear & Axle: https://revolutiongear.com/ Low Range 4x4: https://www.lowrange4x4.com/ 00:00 Why your JK needs higher numerical gears 00:40 How a ring and pinion works 01:44 Powertrain differences with the JK 03:33 4.88 vs 5.13 04:57 Pinion size 06:26 Professional installation 07:12 Why I went Revolution Gear & Axle 08:20 Driveshaft upgrade 11:19 New 37x12.50R17 Nitto Trail Grapplers 11:44 fuel economy after re-gear 12:22 Gear calibration 13:14 Gear break in 14:14 Wrap up Subscribe: https://www.youtube.com/c/DrivingLine?sub_confirmation=1 Follow Driving Line on Facebook: https://www.facebook.com/drivingline Follow Driving Line on Instagram: https://www.instagram.com/drivingline/