Strange Noisesįor the most part, your transmission shouldn’t make any weird noises. The fluid looks for a way to escape the system, which causes the leaking. Leakage tends to occur because of the seal’s breakdown from excessive pressure and buildup. Usually, transmission fluid is red, so it’s not difficult to spot. Sometimes, the first sign people get that there’s a problem is when they spot the transmission fluid puddle under the car. You might notice hard shifts and slippage between gears as well. This mixture creates other issues, such as difficulty shifting without the right amount of lubrication. When the pressure builds up, foam and air can form, affecting the lubrication of the internal parts. If there seems to be an issue changing gears, there could be too much fluid in the system. If you want to check your transmission fluid via the dipstick, it’s best that you warm up the engine first. If the vehicle has been sitting, it will have a much thicker texture. When the vehicle is running and heated up, the transmission fluid becomes thinner. You can pull out the dipstick and check the levels, but it’s not always a reliable indicator. If you think you might have put too much fluid in the transmission, the problem is easy to spot by looking at the dipstick. Whether you are dealing with leaking seals, unlubricated metal parts or the buildup of pressure, all of these things take a toll on the transmission. Over time, failure will occur from a combination of things. However, leaving the issue unresolved is only asking for trouble. It’s unlikely that your transmission will fail overnight as a result of too much fluid. It could even lead to the next issue, complete failure.
By overfilling the transmission, the lubrication level isn’t the same, leading to much faster wear.Īs the transmission continues being exposed to high pressure, you will start to notice issues with shifting and functionality. The moving parts of the transmission require the right amount of lubricity to work correctly. This situation reduces the ability of the fluid to lubricate the internal parts, causing the next two problems we will discuss. This pressure doesn’t just cause fluid to leak out and overheating, but it can also bring air contamination in with it.Īir contamination happens because the gears rotating inside are splashing liquid around, which causes a chemical reaction producing air bubbles and foam. Pressure BuildupĪs we just touched on, putting more fluid in the transmission than it needs increases the pressure inside. If it leaks out of the gearbox, seals are going to be broken, which reduces the lubrication on the gearbox, causing overheating. However, when you overfill the transmission, there is going to be some leakage from the buildup. By using too much of it, you could cause an overheating situation, which sounds a little backward at first. Transmission fluid is responsible for keeping the transmission cool. Here are some other consequences of overfilling your transmission fluid in detail: Overfilling Your Transmission Fluid ConsequencesĪ few problems may occur if you overfill your transmission fluid, and here are the four most common issues. It is often quite easy to drain some transmission fluid, and definitely worth doing if you have an expensive car.
If you are driving a newer car with a DSG or CVT transmission, it may be a bad idea to drive around with too much transmission fluid. If you overfill your transmission with 1 quart or more, you should definitely consider draining it. However, if you overfill it with 1/2 quartz or less, there is usually no need for action. Overfilling the transmission can adversely affect the performance of your transmission. Recheck the Fluid Level What happens if you overfill transmission fluid?
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