differnce in tdrailer towing ratings i.e 2000/6500

Hi toby! I'm not sure where you are getting the 2000lb pound spec but here us an article that may clear up what goes into a tow rating. Hope it helps, good luck! Terminology is important! Just knowing your tow rating isn't enough By Cliff Maurand There is more to than just knowing what the tow rating for a particular vehicle is. For instance, the tow ratings on the left list the Gross Vehicle Weight Rating (GVWR) for those vehicles. This is total allowable weight the towed vehicle can weigh, including all options, equipment and supplies. There may other limitations that we have not covered, such as total of both vehicles. The list provides only tow ratings that are specified by the manufacturer of the particular vehicles. Also, use of such devices as Weight Distributing Hitch (WDH) does not alter the specified weight of either the tow or towed vehicles in any way. It does alter the tongue/hitch weight, by distributing that weight back down the frame of both tow vehicle and trailer. Below is a quick glossary of tow rating terminology. It is up to you to know what you're towing, and whether or not you're within the proper and legal specifications. Be careful, some sales rep's will tell you that what ever you're driving can tow just about anything. Do your homework, and check everything carefully. One last item, use the 75% rule. While there is no law or mandate that you follow this, it is a good rule of thumb to never exceed 75% of the tow vehicles weight limit when determining how much trailer you can pull. This gives you a little room to stretch, as well a margin for error. The last thing you want to do is max the load on you're tow vehicle. And if yours didn't come equipped with a factory tow package, check with you're dealer for additional information on what will be required before towing. Items such as transmission coolers for Automatics are going to be required. Towing laws vary by state also, and what may be legal in one state, is not in another. Some states do allow passengers to travel in a trailer, but most of them do not! Towing a second trailer behind the first one is allowed in a few states too, but not in most. Some states require the use of special tow mirrors, but most do not regulate this. Below is a quick guide to tow rating terminology... GVWR (Gross Vehicle Weight Rating) This is the total maximum allowable weight of the fully loaded trailer, and is not to be exceeded. This includes the unit's base weight, all cargo, all fluids, and all optional equipment. In a word, EVERYTHING! If you do not know what this weight limit of your trailer is, it's easy to find. All trailers in the U.S. have a "Safety Compliance Label" located on the left front exterior of the trailer, either on the frame or the side of the unit itself. Base Unit Dry Weight This is the actual weight of the trailer, before adding any equipment, cargo, or fluids. This is the empty weight of the unit itself. It is comprised of combining the axle weight and the tongue/hitch weight. Axle Weight This is the percentage of the trailers dry weight that is supported by the axle, wheels, and tires. Tongue/Hitch Weight This is the percentage of the trailers dry weight that is supported at the tongue on the tow vehicle's trailer hitch.