How much does it cost to have your transmission flushed

Typical costs:

• Expect to pay $75-$150 or more for a standard transmission fluid change. This typically includes replacing the filter, and generally uses about 5-7 quarts of fluid. It does not replace the 5-8 or more quarts of fluid trapped in the torque converter, so old fluid will mix with new. Some experts recommend draining and refilling three times, so the fluid is completely changed.
• Flushing a transmission with a pressurized machine can cost $125-$300 or more, and may include pushing a special cleaning compound through the system. The power flush process typically replaces all of the transmission fluid, and can require 12-22 or more quarts.
• Prices vary depending on the procedures used; the make and model of vehicle; and whether the work is done at a standard repair shop (either independent or part of a chain) or at a car dealership -- and prices can be considerably higher for luxury or exotic vehicles. For example, CostHelper readers report paying $90-$378 for a transmission flush at a oil-and-lube or auto repair shop, at an average cost of $160; or $77-$295 at dealerships, at an average cost of $205; and a CostHelper reader in Nevada reported being charged $766 for a transmission fluid change on a Lamborghini Diablo.

• For a standard transmission drain or service, a drain plug in the transmission is removed and the fluid is allowed to flow out into a pan. CarReality offers a how-to video[1] .
• For a power flush, typically the machine is connected to the transmission, and the vehicle is left running during the flushing process; the exact process will vary depending on the machine used. Machine manufacturer Wynn's has a video demonstration of a flushing machine[2] .
• Debris dislodged by a power flush sometimes clogs the transmission or the pressure might damage the seals (although not all flush machines use high pressure). Many manufacturers recommend draining and replacing the transmission fluid periodically, but do not recommend a power transmission flush. For example, Honda[3] warns against transmission flushing, saying there is no benefit to a power flush and it could void the warranty.

• Do-it-yourselfers can save money by draining and replacing their vehicle's transmission fluid. AutoMD.com provides general how-to instructions[4] and estimates the project as moderately difficult. The main cost is the quarts of new transmission oil. CostHelper readers report paying $40-$175 for do-it-yourself supplies, with an average of $90.

• Always check the maintenance schedule listed in the owners' manual before ordering a transmission service or flush; some shops may recommend these procedures before they are needed. Consumer Reports lists transmission flushes among the "extra and often unnecessary procedures"[5] that might be considered auto-repair rip-offs.
• The National Institute for Automotive Service Excellence provides a searchable directory[6] of certified shops.
• Consumer Reports lists tips for finding a good mechanic[7] .