A transmission oil change, normally called a transmission flush, costs between $75 to $150 as of 2015, according to CostHelper Cars. Standard flushes typically include a filter replacement. Repair Pal reports the national average for a transmission flush runs from $150 to $207 with labor and parts.
The labor cost is between $125 and $159 for a flush, according to Repair Pal. The filter part ranges from $25 to $48. Some people use a more powerful pressurized flush with special equipment. The cost for this type of service ranges from $125 to $300, reports CostHelper Cars. It clears out all of the old fluid and comes with 12 to 22 quarts of new fluid.