transmission flush cost midas
1 The average cost for a transmission fluid flush is $150 to $250 for most cars and up to $375 for lifetime fluids.2  The average cost for a transmission fluid filter and fluid service is $89 to $159 for most cars and light trucks. Midas Hawaii in Honolulu, Hawaii, offers transmission flush services for $144.99, which includes a test drive in addition to transmission fluid change.