Originally Posted by guestPacer
Many years ago I mounted an Easy-Lift class V hitch to my truck ...
Class 5 receiver hitch means max tongue weight is 1,000 pounds WITH A WD HITCH
and no extension. Without a WD hitch, the max tongue weight is probably 500 pounds.
You probably have the common 2" receiver. For that receiver I have a 14" extension that says the receiver weight limit must be reduced to 65% of the hitch rating. So assuming your receiver is rated 1,000 pounds tongue weight WD, then your max tongue weight with a WD hitch is 650 pounds.
My extension also says max tongue weight using that extension is 650 pounds with a WD hitch or 400 pounds without a WD hitch. So if the 65% rule doesn't get you because your hitch is rated for more than 1,000 pounds tongue weight WD, the max tongue weight limit for that extension is still 650 pounds.
An 8,400 pound trailer with average 13% tongue weight will have almost 1,100 pounds of tongue weight. Your receiver would have to be rated 1700 pounds tongue weight with a WD hitch in order for you to have enough receiver capacity for a 14" extension to still have 65% of 1700 max tongue weight.
If your 2" receiver is the typical class V receiver with 1,000 pounds max tongue weight, then you're going to have to rip it out and replace it with one that has tongue weight rating of at least 1,700 pounds WD. That probably means a 2.5" or 3" extra-heavy-duty receiver.
First find a receiver hitch rated for 1,700 pounds tongue weight WD that will fit your Econoline. Then find your extension that will fit that receiver and reduce that 1700 receiver weight capacity down to 1100, and is rated at least 1,100 pounds tongue weight with a WD hitch.
Sorry is there any higher load extensions out there or is that just an white elephant dream?
With a quick search, I don't see either the receiver or extension with enough weight capacity to handle your needs. But try searching for a 3" receiver and then a 3" extension and maybe you'll find something.
My local farmer's welding/fabrication (blacksmith) shop can probably start with the Reese Titan 2.5"receiver for an F-450 and modify it to bolt onto the frame of your Econoline. Then if you cannot find a 10" or 12" long receiver extension with a 2.5" shank that can handle 1,100 pounds tongue weight, he can build that too. I'll bet many of the farmer's blacksmith shops in your area can do it too.