the fx4 has 4.10 gears right? thats what i have and i have towed a small 18?? foot trialer with my 95 sunbird demo figure 8 car several times with no problems. it does struggle a lot more than stock tho
I'm body lifted with 33s with 4.10 gears and a 4.0 with 190k and I haul a 5x8 landscaping trailer fully loaded 5 days a week with a 48" Gravely and a 32" World Lawn and all the other necessities for mowing. It pulls it fine but you can tell at times the drivetrian hates me especially when I have a bed full of grass. Buuutttt Its all I have right now.