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Hi Mel, I personally believe your tailer load will be too much for that size vehicle, not because of the wheel base but from the soft suspension, hitching, and tires. You will be more likely at 960lbs TW (tongue weight) at 12% to make the load pull correct. Can the tires handle that extra weight at maximum pressure? Is the TV (tow vehicle) rated for that kind of TW? Add 960lbs to the empty GAW (gross axle weight) then look on your drivers door post for GAWR and I bet you will exceed the GAWR of the Bronco. GAWR is really important on this type of axle as your axle is held on by a press fit on the bearing. Turn to hard with the axle overload you can pull the axle off the bearing. A 3/4ton or larger uses a bearing held on by a nut and locking plate with the axle bolted to the hub. Is the hitching rated for that TW and trailer GVW? I bet not! I would bet it's a class III rated at 5kGVW and 500lb/TW. From what I've seen of the newer factory hitching, you best not exceed the rating. For the past 40yrs I've used a rule of thumb for loading trailer weight and it's never been wrong from a VW diesel to my 2-1/2 Dodge. Measure your rear bumper before loading then load the trailer and put the load to where the bumper goes down 2". That should be the correct TW for that vehicle and load weight. On any new load weight I always work my speed up in 5mph increments until the load proves it's self at that speed. I've noticed that a bad load first reacts at 25mph then again at 45mph, but that's not written in stone. T_Bone
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