Quote:
Originally Posted by Kiwi
This tow capacity rating is TOTALLY dependent on the rear axle ratio. I have the 3.73 and it tows like a dream. You can get the axle ratio off the VIN number.
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A little late to make a change in the gears. With the terrible fuel economy mentioned the OP's truck probably has taller gears and so the engine is struggling much of the time when towing and outside its peak torque RPM's.
Unfortunately the dealers' salespeople sell whatever is on the lot and seldom are the trucks equipped with 3.73 gears much less 4.10 gears which are optimum when available.