Originally Posted by faye
I personaly don't understand the references to 1/2 ton, 1ton etc.
We used to tow with a mercedes ML270. Never ever had an issue with it! It is no more noisy then a petrol version, would pull all day, never ever struggled even with the tight narrow steep mountain roads round us and towed a 2 horse trailer out of axle deep mud where even tractors were getting stuck.
Generally, the term 1/2 ton refers to how much weight can safely be placed in the bed of the truck or how much weight the rear axle can support.
This really isn't a good term for towing and the terms GVWR and GCWR are a better indicator of how much a vehicle can haul and tow. HowStuffWorks "How Gross Combined Weight Rating (GCWR) Works"
My F350 has a Gross Combined Weight Rating of 20,000 lbs. So, the truck weighs 9,000 roughly, and the weight of the truck plus the trailer cannot exceed 20,000 pounds.
The Gross vehicle weight rating is the maximum the truck (or trailer) can weigh loaded and includes passengers and cargo. The GVWR for my F350 is 13,000 pounds, or, 9,000 is the weight of the truck, and loaded with cargo it can weigh 13,000.
Click on the other links on page I've listed above and you'll find more than you wanted to know on how trucks are rated.
Generally, the lighter the truck, the less it can haul or pull.