For 2018-Current Jeep JL Wrangler 

Motive Gear Performance Series Ring & Pinion sets are constructed of quality 8620 steel that is precision CNC-machined throughout and subjected to a computer-controlled heat treatment process. They are also double lapped, have index tooth spacing and central contact patterning. This High Performance Series comes in a huge range of ratios. These gears are used in stock car racing, drag racing, the toughest off road racing, sports cars, muscle cars, trucks and everyday automobiles when the driver demands the highest quality and performance.