Forum Discussion
4x4ord
Mar 17, 2018Explorer III
The Allison is a week transmission compared to the others. Some time back H&S wanted to see what it would take to break a Duramax. It took a lot but in the process they discovered that the stock Allison began slipping at about 570 HP. When they tested the Ford the stock transmission began slipping at 880 HP (1600 lb ft of torque)
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