It varies by year and model.
Aftermarket chips are sold for some year models.
Some models have transmission settings that lock out tow haul.

It will take dealerships so long to fix the plastic shoe on the timing chain on this many affected engines that i would not be surprised if FCA issues a TSB that locks out MSD until the repair can be started.

My memory is fuzzy but i believe that if you wire in a resistor into the Engine Coolant Temperature Sensor thermistor to fool the PCM computer into thinking that temperature is less than 183 degrees, MDS will not engage because "warm up" has not completed. This will set a check engine light.