TMC added the Class III plus (8,000lb rolling load/500lb on the tongue) receivers in 2016 to avoid a weak link in the chassis for the great majority of owners.
They made the frame capable of these numbers, so if you load the RV below GVWR, you can safely tow the max 8,000lb. This is where TMC differs from other brands who only build the frame to 5,000lb capacity.
For the Jeep, there's probably no worries about the towed weight. The RV probably weighs just over 18,000lb UVW, so you could load a ton in the RV and still be able to tow the Jeep. What does the orange OCCC sticker on the entry door report..that number was taken at the end of the assembly line at the factory?
And, you could tow up to the full 8,000lb with the V10/6speed combo, if you wanted to...Just load lightly (i.e. empty tanks) then check the RV's weight on a scale to see how much of the 8,000 is available (26,000lb [GVWR] minus RV weight = tow capacity [up to 8,000]).