Differance, Not Sure

If what you stated about the speedo reading 85 when only going 55 is correct, & speedo was accurate before, then I think the math would be like this.

55/85 = .6470588

.6470588 x 21,886 = 14,161.5 miles.

This gives an approximation of the miles traveled by the vehicle, but since the engine was spinning faster, the 21,886 is a more accurate indication of the wear on the engine & trans, although they don't have to work quite as hard because of the mechanical advantage of the 3.91 gears. As far as tires, wheel bearings, brakes & the like, the lower mileage would apply. Somebody correct me if my reasoning is wacko. :violent1:


:burnout: