Jeremy Ayers from Nitro Gear & Axle uses all the power the 3.0L eco diesel can muster to climb Rock Hill. This WK Grand Cherokee is a total sleeper. If you did not know that ’07 WKs came from the factory with IFS, you would think they did after looking at this clean Grand. The Diesel V-6 spins a JK front Dana 44 with a Nitro Gear & Axle 4.88 ring-and-pinion. Out back, the factory corporate Chrysler 81⁄4 with like gears spins 37-inch Nittos.