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[88beast]

i have a 1993 ford f250
7.3 diesel no turbo
auto trans
3.55 rear gear
4 wheel drive
8800 gvwr
can anybody tell me the maximum trailer weight

well there is a few ways to look at this
one front axle is rated 3800 (ttb)
rear axle is rated 6100 (rough figures)
your truck weighs 6-7k well say 6500
so you probably have 3000 front and 3500 rear
so thatll allow you 2600 lbs in bed (hitch weight 20%)
so id say a gn or fver would be in the 13000 range which is done by rvers a lot
but to be comfortable on grades id stay in the 10000 area or even 8k with your 3.55 gears

but your gcvwr is somewhere in the 14k area which is useless in towing anything because this is what ford says it will tow and stop in any conditions and do it safely but if you have trailer brakes, you can add 3k per set of brakes as a saftey margin ex: trailer is 13k but your gcvwr is 14k and your truck weighs 6k that means your rig would be 19k total
but if it has 2 sets of axle brakes then you can add 6k to your gcvwr in effect to get 20k safely towed

but the difference between your truck and an f350 drw is just rear suspension and a gear change so if you go to drw your 3.55 gear will not work youll need a new front so you may as well get the dana 60 which is 200lbs more axle rating but you will never go over the ttb's weight unless you add a huge bumper up front

to sum up
8-10k on large grades 13k on flatland and use trailer brakes at all times