ADDING THE RIGHT AMOUNT OF TRANS TUNE TO TRANSMISSION FLUID. Unless the transmission contains an excessive amount of fluid, one pint (473mL can) is our recommended dosage amount when adding to auto transmission systems.  Check your fluid amount before adding Trans Tune. Additional: Trans Tune can be used as a pre-flush cleaning treatment or as a conditioner for the life of the fluid. Add any time to smooth out rough shifting caused by varnish. Trans Tune only contains petroleum-based ingredients. It does not have harsh detergent or abrasive chemicals that can harm your transmission. Trans Tune will not change the viscosity of transmission fluid or harm seals, gaskets or o-rings. Trans Tune is compatible with all conventional and synthetic petroleum and mineral-based automatic transmission fluids. Do not use with silicone fluids or CVT systems. Treat fluid with Trans Tune one time per fluid interval. Benefits: Trans Tune works quick to dissolve harmful deposits and control the moisture that impairs fluid system parts. When added to transmission fluid, Trans Tune works safely and quickly to smooth out shifting problems in transmissions caused by varnish formations and deposits.