ok guys thanks...im going to flush my system first...look inside radiator..see if its cruddy...an add an electric fan to the front as a pusher..if theres room...my trailer by the way is an apache solid state tent trailer..wieghs 1600..with goodies...maybe 2000-2100..not alot...gearing is 3.55 according to the build sheet..from dodge..which i think is alittle i guess tall fortowing...considring it does have a factory tow package...we a wanting to move up to like a 20 to 25 5th wheel ..but dont know if she can do it with this gearing ..thanks...