you can call your any ford dealer parts dept., give them your vin number, ask them you want to know what gear ratio your rear end has. once they give you the ratio, you can look in your manual, it will list the towing capacities for different gear ratios. my '98 f150 v8 4.6 will tow up to 7000 lbs., now that also depends on your the class of hitch on your truck. there are different classes for different wieghts, a hitch installer may help you on that.