Tuthill Drive Systems says its EZ Trac front-wheel drive system is the first steerable hydraulic drive axle for heavy-duty trucks that require both on- and off-highway capabilities. It can be retrofitted or installed on new equipment. Unlike with traditional off-highway vehicle axles, EZ Trac is installed without altering the truck’s ride height, maintaining the existing steering angles and suspension. Installation takes approximately one-third of the time required for mechanical axles. Unlike many mechanical systems, EZ Trac can be engaged and disengaged on the go with the use of a cab-mounted switch.