chris2021 wrote on 2022-08-13, 05:28:
The LT-1s were capable of towing something like 5000lbs, maybe 6000, with the towing package (a differential w/the proper gear ratios). Not that it was necessarily a good idea according to some. But the vehicle sat lower to the ground and had an actual cast frame so I'm not necessarily seeing why it would be an issue, actually preferable to a truck, which was a bit more top heavy. In theory anyway. But what do I know.
The Caprice, the Roadmaster (91-96) and the Fleetwood (93-96) could be equipped to tow 7000lb, but right axle final drive and gear ratios necessary, which either came with tow package or "commercial" chassis (Typically hearses, though there might have been an ambulance or two). In the regular model they could do 5000lb. Ideally you wanted a load levelling setup to get the weight on the axles because there was a bit of rear overhang.
It was only when these models were gone that the "Only trucks can tow" BS train really got moving, because it was hard to argue when the full size cars had the same damn engine, same damn gearbox, same damn rear axle, same damn rear springs. Typically their brakes were more effective though, because the disks were the same size inside a 15" wheel as the trucks, but the trucks would have 235/75 and the cars maybe 215/70, so there was more leverage working against the brake on the trucks than the cars. Though it's less of a problem with trailer brakes and a brake controller. However, until WELL into the 2010s, they were selling trucks of equivalent HP and worse brakes than larger sedans and other vehicles., sedans stopping in 140ft or so from 60mph, trucks needing 220ft... in other words, stick a modest 3000lb trailer on 'em when the trailer brakes don't work and the sedans can probably reign it in 10s of feet shorter than the trucks could. Assuming decent levelling and sway equipment. Then somehow this makes trucks even more perfect for more weight, given spare GVWR for hitch weight. Sometimes that wasn't the case though, you could option trucks weird, have only 700lb cargo available, yet somehow still be rated to tow 10,000 (Doesn't happen now though since shakeup) meanwhile your vehicle with 1700lb cargo capacity, 50+ft better braking from 60, gets a "token" 1 or 2,000lb tow rating if they bother to rate it at all.
The actual fly in the ointment with this, appears to be the crash testing, passenger vehicles aren't allowed to kill other passenger vehicle occupants when rear-ended, but trucks are. Therefore to have an official tow option it has to be designed as a breakaway piece that goes under the vehicle and doesn't make the impact absorbing zones less absorby, whereas you can have a girder across the back of a truck... though in your econobox you're probably ain't gonna rear end it unless you're really asleep, it's got crappy stopping distance remember. Since it's megabucks to engineer the strong but not too strong offical tow options, they don't bother on vehicles "not for towing" even though up to medium weights at least, they would likely be superior for it.
Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.