There are differing opinions about whether a transmission flush is needed for a car or not. A flush can be an effective way to clean out the transmission of any buildup, if it is done effectively. The best way to ensure that is to speak with a reliable mechanic or repairman.
A transmission flush is the process of fluid being forced through pressure against the normal flow of fluid. (Normal flow is left to right; a transmission flush pushes it right to left.) This process is completed by connecting a machine that will force the solvents backward. By doing this, the junk that accumulates will be flushed out throughout the process.
Flushing out the transmission of a car can help to prolong the life of the engine. The flush helps to clean out the transmission. It clears the transmission of any possible buildup that may be happening. When buildup occurs, the engine has to work harder to push through it. Cleaning it out causes it not to have to work as hard--and thus it will last longer.
There are dangers associated with doing a transmission flush. Engines have small passages through which oil or transmission fluid are expected to flow. If the flush is done too aggressively, huge chunks of sludge may be forced off and pushed against the valves of the car, which can cause the valves to break or the sludge to become lodged in them.
Another process available is to drain the old transmission fluid. This is done by removing a drain plug, draining the old fluid, and replacing it with new fluid. However, this method doesn't ensure that buildup is eliminated from the system. A flush ensures a thorough cleansing of the system and that the old fluid is completely removed from the system.
A transmission flush can cost $75 to $200 depending on the type and year of the car. To decide whether a transmission flush is right for you, speak with the dealer you bought the car from or a mechanic who is trustworthy. There are differing opinions on transmission flush procedures and whether they are needed.
