Superior Shift Kit 500 518 618 * Premature band failure * Inadequate line rise * Slow engagements * Premature clutch failure * Lower 2-3 shift MPH * Full time lube * Rapid fill manual valve * Services regular, heavy duty, gas, and diesel * Improves overall performance The K500-618-L Shift Correction Package will service all 99 and up 42/44/46/47-RE units includes a new governor pressure control valve