2007,2,3 liters,a/t give me headaches

[adipainter]

HELLO EVERYBODY,my 2007 ford ranger xl,2.3 liter, 30000 miles give me troubles,yesterday when I pulled my small boat the transmission start to disengage (or to jump) in a 3 rd gear on and off depends how fast i press mi foot on gas pedal,always when i pull my boat (probably 10 times short distance) i used with overdrive off ,but now overdrive sign start to blink on and off on my dash.Today I tried without boat and same situation.I am surprised ,I have installed a extra transmission cooler with gauge temp.(never run over 180 degrease)extra air struts,etc.my boat is a aluminium 16 foot with a light trailer -those trucks are so sensitive?Should I have to sell the boat or to upgrade the truck?.If anybody now more then me ,please let me know..:temper:

[nn2004]

I bet by installing that extra cooler the warranty is in the crapper. It must of had something in it that clogged something somewhere.