Ok sitting here wondering if I bought the wrong car... However, doing some math comparing the suburban, which backs up just fine, and the X5, it appears that the X5 should actually have higher torque at the wheels in reverse than the 454 suburban.
Assumptions:
R X Final X Torque = Wheel Torque (is this right?)
Suburban
R:2.085
Final: 3.73
Total Ratio: 7.78
Torque: 385
Wheel Torque: 2994
BMW
R: 3.295
Final:3.154
Total Ratio:10.39243
Torque:300
Wheel Torque: 3117
Is that math right?
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