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How do you tell if your transmission fluid needs to be changed?

The transmission is a critical component of your vehicle, responsible for transferring power from the engine to the wheels. Regularly checking and changing the transmission fluid is essential for maintaining the health and longevity of your car's transmission. Here's how you can tell if your transmission fluid needs to be changed.


Check the Transmission Fluid Level


The first step in determining if your transmission fluid needs to be changed is to check the fluid level. This is typically done by locating the transmission dipstick, which is usually located near the front of the engine compartment. Pull out the dipstick, wipe it clean, and reinsert it fully before pulling it out again to check the fluid level. The fluid should be at the appropriate level, as specified in your vehicle's owner's manual.


Inspect the Transmission Fluid


Once you've checked the fluid level, it's important to inspect the condition of the fluid itself. Transmission fluid should be a bright, translucent red color and have a smooth, slippery texture. If the fluid appears dark, thick, or has a burnt smell, it's likely time to change it. Discolored or contaminated fluid can indicate a problem with the transmission and should be addressed promptly.


Consider the Mileage or Time Elapsed


Most manufacturers recommend changing the transmission fluid at regular intervals, typically every 30,000 to 60,000 miles or every two to three years, whichever comes first. If your vehicle has reached or exceeded the recommended mileage or time frame, it's a good idea to have the fluid changed, even if it appears to be in good condition.


Watch for Transmission Issues


If you notice any of the following issues with your vehicle, it may be a sign that the transmission fluid needs to be changed:



  • Delayed or erratic shifting

  • Slipping or hesitation when accelerating

  • Grinding or whining noises from the transmission

  • Leaks or fluid dripping from the transmission


If you experience any of these problems, it's important to have your vehicle inspected by a qualified mechanic as soon as possible to prevent further damage to the transmission.


Regularly checking and maintaining your vehicle's transmission fluid is a crucial part of keeping your car running smoothly and efficiently. By following these steps, you can ensure that your transmission is in good condition and help extend the life of your vehicle.

How does a car act when it needs transmission fluid?


Difficulty Shifting Gears - If you ever accelerate and hear your engine rev, but don't feel your car go any faster, your transmission is likely stuck in gear. Drivers with a manual transmission will feel some resistance when you try to shift. Not being able to shift is a direct result of having low transmission fluid.



How much does it cost to get transmission fluid change?


The cost of a transmission fluid change, typically ranging from $100.00 to $300.00, is tied to the specific fluid required by the vehicle. Quality, brand, and quantity contribute more to the cost than labor.



What does low transmission fluid feel like?


If your gears are slipping, it's a clear sign your car's running low on transmission fluid. When experiencing sudden up and down shifts, high RPMs right before shifting, or erratic shifting, seek assistance from your local service center to prevent your transmission from overheating or becoming damaged.



How much does it cost to change your transmission fluid?


The average tranny flush should run between $80–150, but some vehicles will cost much more if it uses an exotic or proprietary fluid, or if it requires the sealed unit to be opened and then serviced, along with a new pan gasket and probably some special filter, as well as any additives, etc.



Why do mechanics say not to change transmission fluid?


That bad fluid may have a “sticky” quality to it or metal flecks that act to aid friction, and if it's changed, the new fluid might cause the transmission to start slipping.



How much should a full transmission fluid change cost?


The cost of a transmission fluid change, typically ranging from $100.00 to $300.00, is tied to the specific fluid required by the vehicle. Quality, brand, and quantity contribute more to the cost than labor.



What are the symptoms of worn out transmission fluid?


You can't shift gears or your vehicle is stuck in gear. You experience significantly lower gas mileage. Your vehicle seems to have trouble downshifting when your vehicle slows down. Your vehicle's engine roars loudly and has difficulty shifting to higher gears when you attempt to accelerate.



How do I know if my transmission fluid needs replacing?


Fresh transmission fluid will typically be bright red, and if yours looks dark brown or blackened, you may want to have your transmission checked out. A few other signs you need new transmission fluid include: Difficult Shifting. Grinding Nose While Shifting.



What are the symptoms of a bad transmission?


Top Signs Your Transmission May Be Failing

  • Transmission won't engage or stay in gear.
  • Shifts are delayed or missing gear shifts.
  • Transmission slipping or engine is revving high.
  • Transmission fluid is leaking.
  • If there's a burning smell.
  • If there is buzzing, clunking, humming noise.
  • Car has no power.



What happens when you don't change transmission fluid?


Your transmission will wear out sooner, and potentially stop functioning properly. You can't go any length of time without wear occurring, the transmission is constantly wearing. The wear becomes much more severe with poor fluid condition.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.