Medium duty trucks.
A mid-90s 3/4t or 1t would haul a 773 on a trailer with some hand tools and maybe an auger in the bed, but that was it. If you had to haul a skid loader behind the F350 dump, you didn't have to worry about the brakes, because you'd be lucky to hit 55mph on flat ground. The Fords got new transmissions about once a year (unless they were ZFs), and any that were used hard ended up with broken frames. Depending on how they were used, it wasn't uncommon to see entire fleets of them with frames that had been repaired numerous times.
If you needed to haul more than a skid loader, there were F650s, F750s, F850s, Internationals, and GM Topkicks. They had Cats and better transmissions (7 speeds or 5/2), but depending on the particular truck, might top out between 58-68mph. They were slow, but they had good brakes.
If you were moving hay or some cows, you might pull a gooseneck flatbed or a stock trailer behind a pickup, but you weren't going more than 30-45mph. It wasn't uncommon to see a guy with a cow or two in the bed of the pickup. If you weren't going far, it just got pulled with the tractor. Anything more than that, and there was a medium-duty or heavy-duty truck for towing the big trailers.
It was the same story for race trailers. Guys either had a 16' flatbed with a tire rack and toolboxes that they towed behind a pickup, or the baller guys had a Topkick pulling a 40-45ft enclosed trailer. If you had a camper, it was a 24'. I remember seeing a lot of big 5th wheels in New Mexico in the early 90s. They looked huge at the time, but they were probably only 35' or so.
That all started to change in the mid-90s when pickups started getting turbo diesels.