Motor Week actually measured the Frontier 4.0 in a 4X4 configuration and come up with the following 0-60 7.6 Seconds 1/4 16 seconds @ 88 MPH I could easily see shaving quite a bit of time not having the added weight and drag of the front diff. Just my .02 worth. Here is a link to the information entered above.
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how to calculate 0 60 time