Provision is made for assessing the wear of the clutch disc linings without removing the clutch or transmission assembly from the vehicle. The check is carried out from below the clutch slave cylinder and requires the use of a special checking gauge, which can easily be made from a strip of scrap metal or tinplate to the specified dimensions. After fabricating the checking tool, apply the parking brake, jack up the front of the vehicle, and support it securely on axle stands. Insert the forked end of the gauge into the machined slot between the slave cylinder flange and the bellhousing, pushing it into the slot until the forked end contacts the slave cylinder pushrod. If the two notches on the checking gauge are not visible, the disc linings are in satisfactory condition; if the two notches are visible, the driven plate linings have reached their wear limit, and the clutch assembly must be renewed. Upon completion of the check, remove the gauge and lower the vehicle to the ground.