@nprofile1q... I asked via the Brave Browser:
For a 2014 Jeep Cherokee KL with the 2.0L diesel engine, the recommended rear differential fluid is MOPAR Gear and Axle Lubricant 70W-80 (MS-2395).
Hydraulic System: If equipped, the rear differential hydraulic system requires Mopar Synthetic Hydraulic Control Fluid (MS-2155)
Some have used 75W-85 or 75W-90 as a top-off or replacement, the factory specification for fuel economy and performance is the thinner 70W-80 viscosity.
HTH😎