How to Check Transmission Fluid

May 1, 2020 | By Mister Transmission

How to Check Transmission Fluid

Regular checking of your transmission fluid is a vital practice to keep up the health of your transmission. Regular transmission fluid checks could save you a lot of money in the long run. But how do you do it?

Not every transmission problem is caused by a problem with the transmission fluid. However, pretty much any transmission problem could be caused by a problem with the transmission fluid.

Your transmission fluid is vital to the health of your transmission. It’s lubricant, it’s coolant, it’s the lifeblood of the transmission. You need to make sure you have enough of it and you need to make sure it’s in good condition. If not, you need to top it up and/or bring your vehicle into a transmission shop to find out the root of the problem.

Now that we’ve established the importance of transmission fluid, you need to know how to check it. You should check your transmission fluid about once a month or whenever you suspect a problem. Here’s how to check your transmission fluid:

  • Step One: Shift your vehicle into neutral or park and put the parking brake on; let your engine run. The engine has to be warm, so don’t turn it off. Pull out your dipstick. Don’t confuse the transmission fluid dipstick for the oil dipstick. In an inline engine, the transmission fluid dipstick is further in, closer to the body of the vehicle. In a front-wheel drive vehicle, it is on the driver’s side. Check your manufacturer’s booklet to find out exactly where your transmission fluid dipstick is.
  • Step Two: Check the fluid. Insert your dipstick into the fluid and then remove it. Look to see if it comes up to “full” line on the dipstick. If not, use a funnel to top up your transmission fluid. Do not overfill it. Keep the engine running for this. If you find you have to add fluid every time you check it, something is wrong. Bring your vehicle in for inspection.
  • Step Three: Touch your finger to the fluid on the dipstick and rub the fluid between your finger and thumb. Good transmission fluid is mostly clear with a reddish tint and neutral odour. Dark coloured or foul-smelling fluid is bad. These qualities indicate a problem with your transmission. Do not ignore these impurities. Bringing in your vehicle now could save you from paying thousands of dollars later for a transmission overhaul.
  • Step Four: Wipe the dipstick with a clean, lint-free rag. Congratulations, you’re done! You just checked your own transmission fluid.
  • Step Five: Most newer vehicles do not have an accessible dipstick in this case you need to bring your vehicle in to a transmission service centre for an inspection.

Mister Transmission

To learn more about transmission fluid or to have your transmission fluid inspected or flushed out, please get in touch with us at Mister Transmission today.

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Tonia was fantastic- great customer...
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Tonia was fantastic- great customer service
Date: March 10, 2026
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I’ve been to Mister Transmission...
Randy G
I’ve been to Mister Transmission in Peterborough twice. The first time I had my trucks transmission, torque converter and differential fluids changed. The second time I was looking for a transmission part for an old vehicle. Both times the service was excellent and the staff were very knowledgeable and friendly. The price for the fluid change was great, they refused to take anything for the transmission part. Thank you
Date: March 10, 2026
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Chris and his crew went...
FamousMinds
Chris and his crew went above and beyond to track down some hard to find parts for my Honda Odyssey transmission. It was a huge job with some setbacks from suppliers, but he never gave up and got the job done!
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Really good explanation by the...
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Really good explanation by the staff like What could be happened. What can be happen in the future. What do i need to do.Really happy about the service.
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My brother-in-law was skeptical when...
Frank Angus
My brother-in-law was skeptical when a dealer insisted our car needed a brand-new transmission and quoted a costly rebuild. Instead, he recommended Mister Transmission on Exeter Road in London to first have a look to see if they could rebuild it instead of buying a new transmission. We took his advice, and we are so glad we did. They thoroughly evaluated the car and determined the transmission was fine; the problem was something much simpler and far less expensive to fix. Their honest assessment substantially reduced the bill, and it restored our faith in finding trustworthy auto shops. Friendly, professional, and straightforward — I highly recommend Mr. Transmission, 300 Exeter Road, London.
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Julie was wonderful to deal...
Anna Halford
Julie was wonderful to deal with. She helped us tremendously to get our son’s vehicle repaired. Would definitely recommend them for future services.
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They did a great job...
Warren Pulling
They did a great job with my caravan. Great service, quick turn around. Thanks
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Got all my fluids changed...
Ahmer Zaki
Got all my fluids changed here on my Mercedes very good prices and they do an excellent job definitely coming back here and would highly recommend
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This location is the best....
Brandon Callaway
This location is the best. Chris is amazing to deal with. Had a torque converter and rear diff replaced and they did it really fast. Highly recommend these guys. 5 out of 5 stars
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Thank you, Giorgio! An honest...
Bobh Yyz
Thank you, Giorgio! An honest operator…I stopped by his Mister Transmission as a mechanic diagnosed a slow leak under my car as transmission fluid.Regardless of being tied up, Giorgio came out front to my Jeep Wrangler, crawled under, came back up, and said looks and smells like oil.He suggested the auto service shop next unit over. We went in and our explained the situation to the operator. I’m in good hands with the service shop now.Bottom line: Giorgio’s good turn, at no cost to me, quickly helped steered me in the right direction.
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