ATLAS JL 2018 NEWER AUTO TRANS 3.8:1 (1.5 IDLER)

The Advance Adapters ATLAS-PS-JL38 (SKU: ATLAS-2SP-JL) is a 2-speed, gear-driven transfer case designed for 2018 and newer Jeep Wrangler (JL) and Gladiator (JT) models with V6 automatic transmissions. It is engineered for enhanced off-road performance with 1:1 high range and various low range options (3.0:1, 3.8:1, 4.3:1, 5.0:1 – ATLAS-PS-JL38 likely refers to the 3.8:1 ratio). It features helical cut gears, a 356-T6 heat-treated aluminum case, left case drop, and is fully synchronized with a 23 spline standard input. It offers shift-on-the-fly functionality with twin stick cable shifters, providing 2WD high, 4WD high, 2WD low (rear axle), 2WD low (front axle for front dig), and 4WD low. A Transmission Control Module (TCM) flash is mandatory for 2018+ JL/JT automatic transmission vehicles to recalibrate for the new transfer case ratio. Tools like Z Automotive or Vgate OBD2 with JScan app can be used. Included are an adapter and spud shaft kit, 303030 cable shifter kit, GKN flange yokes (retains stock driveshafts), 301603 site tube, and 300377A computer-integrated adapter.