Both ford axles are the (square housing) eaton electric two speed so I just assume they are close in gearing. I wouldnt think they would put a f800 out on road in 1989 that could only go 50mph pinned out like my c50 lol. But hell idk I guess if I had bigger tires on my axle I might hit 60 who knows but with the rear spindle threads being the way they are think I need to get it fixed/replaced soon. I got a load of fire wood the other day after putting it back together and it seemed fine nothing moved I made a mark all the way around brake drum on dust cover to see if drum/hub loosens and starts to come off and it has been in same spot since I put it back together so I feel alright but knowing the threads are sketchy it worries me.
