If you notice a dark or bright red fluid beneath your car when parked, this is likely a transmission fluid leak. Why does this leak occur?
Why Does My Transmission Fluid Leak While Parked?
Transmission fluid leaks are quite easy to identify due to both their color and consistency. The fluid is thicker than brake fluid and is noticeable on a driveway or in a garage. Let’s look at 8 reasons why this leak may be occurring.
1. Bent Transmission Pan
The transmission pan doesn’t have to wear out entirely to cause a leak. There are cases where the pan gets bent and allows fluid to escape. Sometimes, this will happen when someone replaces the transmission fluid and uses too much force when attempting to remove the sealant.
Excessive force can result in the bendable steel of the transmission pan getting deformed. This would cause the pan to lose its ability to seal and prevent any leakage.
2. Worn Out Transmission Pan Gasket
The majority of transmissions feature a pan and gasket to help keep the fluid in place. As time goes on, though, the seal between the pan and transmission can wear out. Eventually, fluid can leak out.
The bolts and screws that hold the pan and gasket in place can become loose and cause a leak, as well. The best way to for drivers to prevent this from happening is to have the pan and gasket regularly inspected. A mechanic can look for rust that can cause holes and result in leaks.
3. Damaged Torque Converter Seal
The torque converter plays a crucial role in a car’s operation. It is responsible for transferring the transmission fluid, which allows the tribune to run smoothly. The transmission fluid may leak if the torque converter becomes damaged.
While the converter’s seals are most likely to become damaged, the converter can be damaged, as well. Depending on the extent of the damage, transmission fluid may leak.
4. Transmission Drain Plug Leaking
A leaking transmission drain plug can occur when too much force is used during a change of the transmission fluid. Someone must tighten the drain plug exactly according to factory specifications. Leaks can happen if the plug is either too loose or too tight.
The drain plug needs an O-ring to be sealed. Installing a new O-ring is always recommended when replacing the transmission fluid. The O-ring typically deteriorates at about the same rate as the transmission fluid.
5. Overheated Transmission
If the car’s transmission fluid is only leaking while parked, it could be an indication of an overheated transmission. Overheating can happen when too much stress is placed on the system from constant acceleration, especially when in hot weather conditions.
The seals keeping the transmission fluid in place can harden or loosen, causing a leak. This issue can be prevented by ensuring the car is not being overworked.
6. Damaged Fluid Lines
Damaged fluid lines are a common cause of transmission fluid leaks when parked. The lines carry the transmission fluid over to the cooler, and even though they can withstand regular, everyday use, they can crack as time goes on.
This can result in a very expensive vehicle repair. Drivers can avoid this issue by monitoring the transmission lines, addressing any visible signs of wear and tear.
7. Bad Transmission Cooler
The transmission cooler is in place to regulate the temperature of the transmission lines. This regulation will prevent the liquid that flows through the lines from damaging the transmission.
If the transmission cooler is not operating properly, it may not absorb the heat from the engine, which allows it to flow through the lines. Excess heat can ultimately damage the lines and lead to leaks.
8. Dirty Transmission Fluid
Just like engine oil, transmission fluid can become quite dirty. Dirt and debris can build up over time, which can cause transmission lines to clog. The buildup can also put some extra pressure on the lines, leading to cracks.
Regular inspections are the best way to prevent this particular issue. Mechanics will ensure you always have a high-quality fluid that is compatible with your car’s make and model.
Heath’s Auto Service In Cottonwood, AZ
At Heath’s Auto Service, our comprehensive range of services covers everything from routine maintenance to complex repairs. Our certified technicians are skilled in handling oil changes, brake inspections, engine diagnostics, tire rotations, and much more. Whether it’s a minor tune-up or a major overhaul, trust us to get you back on the road with confidence. Contact our team at Heath’s Auto Service today!
