TSB : Intermittent Buzzing/Grunt During Partial Load 2-3 Upshift

Details

CAUSE: Resonance from hydraulic and frictional vibrations during K1 application. REMEDY: No known remedy. DO NOT REPLACE ANY PARTS! NOTE: This noise during shifting is a characteristic of transmission series 722.3. 722.4, 722.5. This noise has no adverse effect on transmission service life. CAUTION: REPLACING THE AUTOMATIC TRANSMISSION WILL NOT PROVIDE A SOLUTION.