Your car may have a transmission fluid leak for a variety of reasons. The first question we will answer is how you discover your car has a transmission fluid leak. Did your most recent visit to your mechanic reveal that? Have you seen puddles of some funny color or funny smelling oil on the ground where you’ve parked? Maybe your car has started shifting oddly and you’re assuming the leak is the culprit. Any of these are good possibilities and possible symptoms of having a transmission fluid leak. The trouble is, any of these symptoms could also point to other problems. Sometimes, power steering and transmission fluid look alike, or are the same working fluid so they can be easily confused. Shift problems can have multiple causes and even mechanics can make mistakes.
The best way to verify you have a transmission fluid leak is to check the transmission fluid level regularly to notice a drop over time. Some new cars have sealed transmission so you will not be able to find a dipstick and must be able to visually verify the leak. On older vehicles, there should be a dip stick under the hood, much like the one with which you check your engine oil. The handle often will be a different color and it will be towards to back of the engine bay. Checking your transmission fluid level can be trickier than checking your engine oil as there are multiple operating ranges based on how cold or warm the transmission is. As the transmission warms up, the fluid will expand showing a higher level on the dip stick. If you are watching for a leak you should check your transmission level with the fluid at a similar temperature each time. An easy way to do this is to check it each morning before you start your car for the first time that day, or in the evening after driving a similar distance and speed on a regular route. Remember, the fluid level needs to be checked with the vehicle idling.
Now that you are sure your transmission is actually leaking fluid, due to an inspection or consistent measuring of the transmission fluid level under similar conditions, let’s talk about why your transmission might be leaking. Automatic transmissions are complicated pieces of equipment that uses a hydraulic fluid to control bands, clutches, gears and other components to change gear ratios. Unless you are driving on the highway, these gear changes need to be made often, smoothly and without failure. To accomplish all this there are a lot of small moving parts that have to be fitted together in just the right way. These transmissions also need to be easily mass produced, installed and serviced in the vehicles they are put into. The only way all this can be accomplished is for the transmissions to be made in multiple pieces that can be screwed or bolted together. Where each of these pieces join there must be a seal to ensure the transmission fluid doesn’t leak out during use. After miles of torque, tough driving conditions, temperature changes, and untold other abuses, these seals will start to leak.
The other area of the transmission that is prone to leak is where in the input shaft enters the case, and the output shaft, or drive shaft exits the transmission. Each of these shafts needs to be able to spin freely, but also need to have a fluid-tight seal between the shaft and the transmission casing. Since the inside of side of the seal is constantly rubbing against the spinning shaft, it also will wear out overtime.
Lastly, these seals and gaskets are usually made of a pliable rubber or silicone material. Over time, these materials can shrink, warp or even get dried and become stiff causing cracks and malformations. No matter how often you change your transmission fluid, all of these leak-causing problems can happen to any car or truck during normal use.
The best way to seal your current leak, or prevent against future leaks, is to add BlueDevil Transmission Sealer to your transmission. BlueDevil Transmission Sealer is not like other transmission sealers that fill your transmission with powders or a thick sludge, to clog up your leaks, and consequently other parts of your transmission. BlueDevil Transmission Sealer is safe to leave in your transmission fluid until your next fluid change and will not clog or harm your transmission in any way. BlueDevil Transmission Sealer will expand and soften the seals and gaskets in your transmission to restore them to their original condition sealing your leaks permanently.
You can find BlueDevil Transmission Sealer at any of our local auto parts partners like:
- O’Reilly Auto Parts
- Pep Boys
- Car Quest Auto Parts
- Advance Auto Parts
- Bennett Auto Supply
- Prime Automotive Warehouse
You can also purchase BlueDevil Transmission sealer directly from BlueDevil here: Transmission Sealer
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