The driver door sticker states ; Axle 82. Does that help?

 

You have a 4.10 ratio


82 — 4.10 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)

 

Thanks Ken. It's a 450 though and "Incomplete body" ie. sold as a running chassis I guess. It is a dually with 16 inch wheels, auto transmission plus overdrive.

So does that tell us what speed at 2,000 rpm?

 

Another way to go,

Edge Products| Product

I have one for my trucks, i can only drive one at a time so it moves from truck to truck and it works on any obdII vehicle.

Just another option!

Good luck

edit; this would basically be a plug and play unit as well.

 

PS As the box is 8ft wide and the wheels come right out to the box I don't know how they call it "Narrow frame"

 

Here is the '03 Body Builders Information. You should be able to search in there for your set-up. Good information to have on hand.

 

Good info. Thanks Ken.

 

Oh ok. Understand that.

 

If indeed you have a 4:10 ratio you will be at 2000 rpm at 60 mph, that's what I get.

 

Thanks, that helps a lot.