This is due to to the relative lack of weight on the rear wheels of the truck since there is very little steel over them. The jeep Haas more steel over the rear tires along with a spare tire over the fulcrum providing more down force on the rear tires. The height advantage on the truck helps a little bit but the cable is so long the angle is only about 5 to 10 degrees so it won't provide much of an advantage. A better test would be to load the back ends of both vehicles with their max load and then try to pull.
[–] draaaak ago
Battle between rear wheel drive and 4 wheel drive? These results are to be expected.