The newest Explorer / Sport Trac is a smaller version of the 1997-2003 Ford F-150 with torsion bars and upper / lower control arms. Like the F-150, the cast nodular iron knuckles are the system's key. Ride Quality & Lift Height One key difference with the mid-size Ford, however, is the odd tulip-style driveshaft used for the front differential. We have found that these driveshafts wear rapidly after the vehicle is lifted and cause vibration over time. Expect the OE front driveshaft to last no more than 20,000 miles after the vehicle is lifted. Therefore, Superlift offers a heavy-duty replacement front driveshaft that incorporates a standard CV joint at the transfer case for improved durability and longevity.