Originally Posted by Tonkatoy77
^^^^^^What is the significance of this?^^^^^^
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"The primary reason for setting a GCWR for any vehicle is safety. Overloading a tow vehicle or a trailer is dangerous enough. Overload both and you've really got a problem. Not only is a heavy load difficult to control on the road, but several other components could also be at risk. For example, the braking systems may overheat and fail, reducing or even eliminating the possibility of safely slowing or stopping your vehicle. The tires may not be able to handle the extra load, potentially causing a blow out situation. The engine and transmission in the tow vehicle may overheat due to the added strain, causing a mechanical failure. Components within the tow vehicle or trailer's suspension system could bend or even break, causing you to lose control on the road. The truth is that a variety of problems could result from overloading. Again, you should never surpass your vehicle's GCWR."
How Gross Combined Weight Rating (GCWR) Works - HowStuffWorks