Chevrolet & GMC, Long Piston Rod
Place suitable gauge (J-7723-01) over piston rod so that it fits between studs on front housing. Gauge should be parallel to studs and resting on surface of housing. Cutout portion of gauge should never be lower than end of piston rod, and gap should never be more than 0.010". Any variation beyond these two limits would require replacement of production piston rod or adjustment of service piston rod.