It won’t legally fly here Cley as you car and trailer will weigh more than the tow vehical. Check out the rules and regulations from SGI. Kim
Long ago, I used to be concerned about that too until someone pointed out to me that every semi truck runs in this condition. 80,000# GVW (or 160,000 #'s in Michigan!) but the tractor certainly doesn't weigh half of that. Perhaps Canada has some specific regs around personal or commercial towing. And I'm certainly not a rules and regs expert!
Someone mentioned that today's trucks are more capable than older trucks in towing. Very true! It wasn't very long ago (<20 years ago) that the Big 3 (I worked for one of them but only on engines) were constantly trying to outdo each other every year with upping their towing ratings on their trucks. It got completely out of control until rational thinking prevailed and SAE standards were brought out to determine towing ratings. Braking, cooling, turning, frame stiffness, etc, etc all became part of the equation. That immediately slowed (not stopped) the increases in tow ratings as each company still wanted what they saw as a competitive edge for their trucks. But this time, they truly did add content to the truck to be able to back up their claimed ratings as opposed to just an "I pulled a house for 5 blocks thus I'm capable" kind of thing (or whatever internal directives they used) . In the end, we the customer got a better vehicle with capabilities that can be compared across the brands.
I've got a 2023 1500 series truck rated at 13,200#'s trailer weight and use it to pull my 24' car hauler enclosed trailer. The towing package on the truck consists of a bunch of big and small things from the transmission, cooling (engine and trans), axle, springs/shocks, braces, brakes, axle ratio, etc, etc. While I have no plans to ever test its full capability, it made multiple trips pulling my car hauler trailer to/from Michigan to Florida when I moved. Other than drinking lots of fuel(!), it did just fine. The heaviest I had it loaded was a tad over 10,000#'s (trailer is rated to 12,000 #'s). I watched the engine and trans temps pulling the grades on I-75 heading to Knoxville, Tennessee, doing 65-70 mph and they never budged. These newer trucks are terrific machines!