A518 limits.
 

So I got my OD working, I drive big truck, wife bought a horse trailer in wa and followed me up to get it from ca. Everything went fine till we hooked up 10k lb of trailer. It went to shit quick! Trans started slipping and wouldn't kick down on hills. It's fried now and getting a rebuild, guess the question is what am I limited to pulling with this trans with fresh rebuild and converter?

I have no source, but I recall someone mentioning that Dodge put the towing limit for a stock A518 at 7,000 pounds.

I was told by my transmission builder that I could tow up to 14,000 lbs. People tow more with first gens and do fine but, I can't imagine doing that.

I'm towing 15k + with a home built 727 trans with mopar performance clutches Goerend converter derail pan with the cooling fins no under bed cooler trans-go shift kit. also drag racing I built it almost 2 years ago & have not had any problems using Valvoline atf-4 synthetic

Maximum Towing Capacity: 11400 lbs 92 dodge 350 factory spec
& your 92 f350 truck max tow spec was 12500. You should be fine when you get it back. I would not go with a factory convertor, suncoast or BD

Thanks guys!