What Can Cause a Car to Leak Transmission Fluid? | YourMechanic Advice

What Can Cause a Car to Leak Transmission Fluid?

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A vehicle’s transmission fluid system is closed, which means that the fluid or oil inside can’t escape when things are working properly. Therefore, when vehicles leak transmission fluid, it indicates another problem than just a need to add more fluid or oil. If your transmission leaks, however, don’t automatically assume the worst. There is a wide variety of causes for a leaking transmission, ranging from simple fixes to fairly serious issues. That doesn’t mean you should put off having your vehicle inspected. Even delaying easy repairs can lead to greater problems when ignored, which will ultimately cause a bigger headache and blow to your pocketbook later. Here are the most common causes of a transmission fluid leak:

  • Loose pan: The transmission oil or fluid pan is designed to catch extra fluid that would otherwise escape, so – if the pan is loose – there is nothing to prevent transmission leaks. The pan may simply not have been bolted back correctly after changing the filter or come loose while driving over rough terrain.

  • Oil pan gasket: High temperatures or faulty manufacturing can lead to a cracked or otherwise damaged oil pan gasket. Although this part is inexpensive to replace, more serious problems can ensue if the issue is left unattended.

  • Misaligned drain plug: After a transmission fluid flush or other transmission service, the drain plug may not have been screwed back in properly along the threads. This can lead to a leaking transmission but is relatively easy to set aright.

  • Damaged bell housing: When driving on gravel roads or on other challenging surfaces, it is possible for a rock or other item to strike the bell housing with such force that it becomes cracked or develops a hole where transmission fluid can escape.

  • Punctured or cracked fluid lines: Similarly, items picked up from the road and flung by the tires can strike the transmission fluid lines and cause transmission leaks.

  • Faulty torque converter: Less commonly, the torque converter, which is responsible for switching gears in automatic transmissions, may be damaged and allow transmission leaks. Unfortunately, this is a costly repair that is also difficult to diagnose.

Unless you are checking your car or truck’s fluid levels as part of general maintenance or notice your gears aren’t shifting as usual, you may not even know your vehicle’s transmission leaks. Another sign that there is a transmission oil leak is the accumulation of a red, slick liquid beneath your car, which may be the size of a small coin or much larger, depending on the severity of the transmission fluid leak. If you know your fluid is low or have seen evidence of a leak in a parking lot or driveway, call us for a consultation with one of our experienced mechanics. He or she can help diagnose the cause of your leaking transmission and make appropriate recommendations for repairs.


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Recent Transmission fluid is leaking Inspection reviews

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YourMechanic Transmission fluid is leaking Inspection Service

Average Rating

4.9/5

Number of Reviews

164

Rating Summary
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Zachary

8 years of experience
43 reviews
Zachary
8 years of experience
Cadillac DeVille - Transmission fluid is leaking - Houston, Texas
Hey after a few bad experiences with automotive mechanics, I can definitely say Zachary is the epitome of one of the good guys. Not only did he share his knowledge with me step by step as he worked , it was very impressive and comforting, how honest and straightforward he was with what he seen during his inspection of my vehicle. I’d definitely ask for him again and recommend him to all!!!⭐️⭐️⭐️⭐️⭐️
Chrysler 200 - Transmission fluid is leaking - Houston, Texas
On time for my appointment, was very informative as to problems with my car. Also addressed concerns I had with repairs. Well recommended I would prefer his work again.

Maxwell

17 years of experience
390 reviews
Maxwell
17 years of experience
Dodge Durango - Transmission fluid is leaking - Conroe, Texas
Max was very knowledgable in what was wrong with my vehicle. Showed up with a very professional attitude, and gave us estimates on what the parts/labor will cost us on spot. Highly recommend him to anyone!!
Ford F-150 - Transmission fluid is leaking - Tomball, Texas
I was very impressed with the knowledge of Maxwell! He did a phenomenal job and went above and beyond to make sure I knew what needed to get done to make my truck run smoothly. I would highly recommend him.

Alfred

12 years of experience
393 reviews
Alfred
12 years of experience
Subaru Outback - Transmission fluid is leaking - San Francisco, California
Alfred was excellent. Friendly and knowledgeable and happy to answer questions. Ill be using this service again for sure if this is the caliber of mechanic I can expect. first rate !

Diego

20 years of experience
564 reviews
Diego
20 years of experience
Ford Mustang - Transmission fluid is leaking - Goodyear, Arizona
Knew what he was doing, and understood my efforts to describe problems. Very professional and pleasant.

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