Common Transmission Problems: The Transmission Leak

June 2, 2022 | By Mister Transmission

Common Transmission Problems: The Transmission Leak

One of the most common problems people tend to experience with their transmissions is a fluid leak. Luckily it is also one of the most straightforward fixes if caught early and fixed promptly.

Continuing to drive a vehicle with a transmission leak can cause further damage, so tending to leaks asap is integral to your car’s lifespan and overall health.

The key to maintaining the life of your vehicle is routine transmission servicing and checking your fluids monthly.

Say you’ve done all that, and there still seems to be something amiss with your transmission. How can you tell if there is a leak?

How To Tell If You Have A Transmission Leak

There are a couple of apparent indicators that you have a transmission leak.

  1. If your vehicle is slow to start moving, that can be a sign that your transmission needs servicing or that it has a leak.
  2. Keep an eye out for puddles underneath your car. If your car recently underwent a fluid change, the fluid will be clear and red. If you haven’t had it serviced in a while, the liquid will be opaque and smell terrible.

If you notice either of these issues, get it fixed at once before they create even more significant problems that require additional repairs.

What Causes A Transmission Leak?

As important as having your vehicle routinely serviced is to understand what causes transmission leaks so you can try and avoid them.

The transmission pan is often susceptible to dents, holes or rust that can cause leakage due to its exposure to road debris. These leaks can often be too small to spot and may take a while to identify. This makes them problematic, as all too often, drivers continue driving, unaware of the leak.

Drain plugs can also be elusive leak sources as loose plugs and overtightened plugs can cause leaks. 

  • Broken seals can and often are the source of the leak. There are many areas where you can find broken seals due to wear and tear. Some of the most common ones are:
  • Input shaft
  • Axel seals
  • Transmission pan
  • Plug seals
  • Sensors
  • Shifter housing seal
  • Valve body
  • Tail housing seal
  • Speedometer seal


  • A busted pan gasket could also be the source of your leak. It’s not unheard of to experience this as it can be caused by lousy gasket alignment, poor manufacturing, or exposure to high temperatures.
  • If your torque converter is cracked or broken, this can cause leaks and prevent transmission fluid from flowing through the rest of the system.
  • A cracked fluid line is rare but can happen. Typically, exposure to extreme temperatures or damage from the elements can cause this.

How To Fix A Transmission Leak

The first step to fixing a transmission leak is to determine where the leak is coming from. This can be a lengthy and tricky process if you are not particularly experienced with car DIY. It might be a process that is better left to your neighbourhood Mister Transmission.

Book a Free Road Test and Multi-Check Inspection, and we can perform a fluid check, road test, and a Diagnosis Scan to help determine your car’s needs. From regular transmission services to total transmission overhauls to fixing leaks, Mister Transmission is there to help.

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Customer Reviews
Zaff was really good.Services: Body &...
Ze Ad
Zaff was really good.Services: Body & Trim, Oil change
Date: June 27, 2022
Website: Google
I have used this location...
D Anderson
I have used this location (Centennial Pkwy.) for transmission repair and preventative maintenance work on several occasions, with more than one vehicle over the years. Owner Steve is both courteous and knowledgeable. The work done here is honest and reliable. They are not in the business of overcharging for work that isn't required! I would highly recommend this location to anyone in need of transmission repair or service.Service: Transmission
Date: June 27, 2022
Website: Google
Great service and honest !Fixed...
NatyBe Creator
Great service and honest !Fixed my problem with very little headaches!
Date: June 26, 2022
Website: Google
Doctor Matt and his crew...
Michael Crofton
Doctor Matt and his crew fixed up a bad situation on a 700R4 in an old car. It’s tough to get ANY shop these days to even consider working on ol school Detroit muscle. They’ve touched both my cars and I wouldn’t have anyone else deal with my drivetrain issues. Thnx again Matt
Date: June 25, 2022
Website: Google
Fantastic place! Staff so friendly...
Dave Nelson
Fantastic place! Staff so friendly I would work there!!
Date: June 24, 2022
Website: Google
Excellent people small family business
Casperft Dubbert
Excellent people small family business
Date: June 23, 2022
Website: Google
A true “five stars” service...
Adnan Isakovic
A true “five stars” service by a professional Team of experts!Had intermittent transmission issues with my old SUV and previously tried to get help from the dealership, with no resolution - until I called Eric.Got immediate attention and effective service. Eric is passionate about his business and someone you can trust without reservations. You will get the best transmission job done for a fair price.Highly, highly recommended!
Date: June 23, 2022
Website: Google
Just want to tell you...
Dan De
Just want to tell you that I had a great experience with AL at this location. Professional, polite and efficient. Most importantly, I asked about putting in a transmission cooler and he told me I already had one. He could have taken me. What more do you want? Honesty and kindness rule here.Service: Transmission
Date: June 22, 2022
Website: Google
They were fantastic with me....
Kelly Copp
They were fantastic with me. I was shown and told exactly what was wrong and how much to repair. As a woman, I was treated with the utmost respect. 10 stars if I could.Services: Transmission repair, Auto engine diagnostic, Vehicle Inspection
Date: June 21, 2022
Website: Google
The staff and work was...
Marsha Saltzman
The staff and work was 5 star. Dropped my vehicle off when requested, and it was completed when promised. Thanks 😊
Date: June 21, 2022
Website: Google
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