As I read it, it specifically reads "on supercharged vehicles".
Back in the 90s, Dodge did the same thing with the turbocharged cars, limited the towing capacity. The thought process back then was the forced induction puts extreme loads on drive line and drive train parts and towing would only increase that already high load.
Imagine a 6.4 supercharged Challenger leaving a stop light, pulling a steep hill, in the rain, probably a white knuckle ride. Now picture that same car at the same traffic light, looking at the same hill, in the rain, but now has to get 5,000 extra lbs to move that is hanging on the back bumper. The 1st event eliminated 75% of the "new" hellcat owners. The second event eliminated all but about the top 5%, and those guys are not going to hang a trailer hitch on their Hellcat, and probably wouldn't be driving in the rain.
Do the same deal except instead of rain, you add a 90 degree day in July, how long do you think that trans is going to last? The trans may do the actual towing just fine, the problem will come 20,000 miles down the road when those burnt up clutches in the trans show up. Got a trailer hitch, yep, your problem, not theirs. The car companies are covering their butts. Gene
Note that the SRT Durango and SRT Jeep Cherokee, and TrackHawk Grand Cherokee all have towing ratings. Motor Trend even tested the new ram TRX 0-60 pulling a 24' airstream trailer(6.8 seconds BTW).
I don't believe its the drivetrain at all, its the fact that if you hammered it from a stoplight with any significant weight hooked to a hitch it would probably rip it from the unibody ofd the LX cars.
