Have you noticed a pool of liquid that’s red in color and sweet in smell under your car? Then you have a transmission leak. Transmission fluid leaks can be a distressing sight for any car owner. Not only do they indicate a potential problem with your vehicle’s transmission system, but they also pose a risk of further damage if left unaddressed. Here’s how you can spot some of the most common causes of transmission fluid leaks and how you can fix them.

1. Worn or Cracked Seals

 A common source for transmission fluid leaks comes from worn or cracked seals, particularly at the input and output dry shaft seals. These seals are susceptible to damage due to temperature changes, which can cause warping, leakage, or cracking. Additionally, damaged or loose O-rings around the drain plug or transmission filter can contribute to fluid leaks. To fix this issue, it’s best to replace the O-ring each time you change the transmission fluid to prevent future leaks.

2. Too Much Fluid

If your transmission is leaking then it could be from too much fluid in the transmission. When adding transmission fluid, it’s important to do so gradually. Your owner’s manual will have the correct quantity. It typically ranges from 9 to 13 quarts for most vehicles, anything over that, your transmission fluid could overflow and cause leaks. To address this issue, use a dipstick to check the transmission fluid level and remove any excess liquid using an extraction pump or by draining it through the pan drain plug or cooler line. 

3. Damaged Transmission Cooler

The internal mechanisms of your vehicle can become a very hot environment, and if certain mechanisms become overheated it can cause issues for your vehicle’s longevity and performance. That’s why there are systems and parts in place to cool the engine and transmission. Your transmission cooler cools the automatic transmission mechanism by circulating transmission fluid. If it becomes damaged, it could cause transmission fluid leaks. To fix your transmission cooler, you’ll need a mechanic to repair or replace it to prevent further fluid leakage.

4. Loose Fluid Line

If your transmission fluid is leaking from the front of your vehicle, it could be a sign that there’s a problem with the transmission fluid line. This part transports fluid to the transmission cooler, which works to keep the transmission from overheating. While these lines are made from very durable aluminum and steel, they can crack or break over time, especially if they lack protective coatings. If you see transmission fluid leaking from the line, it may need to be replaced to prevent ongoing leakage.

5. Transmission Pan Gasket Leaking

If you’ve ever had to replace your transmission fluid, you’re likely familiar with the transmission pan gasket. The pan gasket prevents fluids from leaking out of the car. If it leaks, it could be from loose bolts or damaged seals. You can fix a leaking pan gasket by tightening any loose bolts, replacing worn seals, or installing a new pan gasket are common solutions to address this issue and prevent further leakage.

6. Issue With Your Transmission Filter

To keep your car running smooth and your engine clean, there are many filters located around the internal mechanisms of your car, including your transmission. Your transmission filter is designed to keep your transmission fluid clean. Most cars will have an internal transmission filter, but some vehicles can have an external filter. Over time, these filters can become clogged with dirt and debris. A clogged filter can lead to fluid buildup, increased pressure, and subsequent leaks in the transmission system. Regular maintenance, including filter inspection or replacement, can help prevent this issue. 

Save on Your Transmission Replacement

If you’re experiencing consistent transmission leaks or ongoing transmission problems, it’s time for a replacement. At Sir Car Part, we offer a wide selection of used transmissions online at affordable prices. Whether you need a replacement due to leaks or other issues, we can help you find the right transmission to get your vehicle back on the road! Contact us today for a free quote on our used transmissions.

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