I have my original owners manuals for my truck which gives towing capacity based on GCVWR...but the only thing I see on my truck is GVWR. How do I determine what my gross combined vehicle weight rating is on a 1988 F350 Dual Rear Wheel 7.5L 460 with 4.10 rear end? I know what the door sticker says is Gross Vehicle Weight Rating...I'm looking for the combo rating for the truck and tow vehicle together.

 

GCVWR is the combined amount of the truck and trailer.


GVWR is that of the truck and its contents..and max amount.


Take the truck to a scale see what it weights.
GCVWR minus what the weight ticket says and then you will know what is left to tow with.

 

I know...my question is what IS the gross combined vehicle weight rating for my truck?

 

GCWR is found in the owners manual and my '90 manual says that powertrain combo(assuming auto trans) is good for 18.5K pounds.

 

You might find more info here as well:


Trailer Towing Guides | Trailer Life Magazine

 

Thank you! Conanski, where is that in the owners manual?

 

It's in the section for trailer towing, you will find a bunch of charts organized first for manual and auto transmissions and then for each engine and axle gear ratio. You won't find anything saying F150, F250, or F350 dually it just comes down the basic powertrain combo since the bigger motors and axles were only offered in the bigger trucks anyway. In your case you just look at the highest rating for a 7.5/auto/4.10 gear and that is the max your loaded truck and trailer can weigh, subtract the loaded ready to travel weight of your truck and the result is the heaviest trailer you can tow.

 

I've have seen this chart..it showed 3 different possibilities for my auto trans and 4.10 rear end...so I can just assume its the largest one based on the fact that its a 350 and DRW? That makes sense since the next largest truck of that year was a Super Duty 450 and the owners manual doesn't apply to it. Thanks!