Received a new Trail King sliding axle trailer with pony motor and hookups for a semi pto. My question is I would like to use my pto on my truck but it has 10w oil in it and the tank on the pony says use only atf and there is a small amount in the tank. If I hook up my semi should I be worried about mixing 10w with atf, and will it possibly cause damage to the trailer or pto on the truck?
I wouldn’t mix fluids. Go with one or the other. I would check the information on your truck PTO and see if ATF is an option. It probably is. Your wet kit probably needs fresh lubricant and a filter change, anyways. Welcome to the HEF!