What Happens If You Put Transmission Fluid In The Oil

When it comes to vehicle maintenance, it’s important to know the different types of fluids your car requires and to use them properly.
Two of the most important fluids in any vehicle are transmission fluid and oil.
Transmission fluid is a lubricant that helps your car’s transmission shift gears smoothly, while oil is responsible for keeping your engine’s internal components lubricated and cool.
Using the wrong fluid or mixing the two can have serious consequences on your vehicle’s performance and longevity.
In this article, I’ll explore what happens if you put transmission fluid in the oil and how to avoid it.
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What Happens if You Put Transmission Fluid in the Oil?

Mixing transmission fluid with oil can cause significant damage to your car’s engine and transmission.
The two fluids have different properties and functions, and combining them can result in reduced lubrication, increased friction, and damage to engine and transmission components.
Here are some of the effects of mixing transmission fluid and oil:
Effects on Engine Performance
When transmission fluid mixes with engine oil, it can cause serious damage to your engine’s internal components.
The additives in transmission fluid are not designed for use in engines and can cause premature wear and tear.
The resulting damage can include worn bearings, scored crankshafts, and damaged cylinder walls, all of which can lead to engine failure.
Reduced lubrication and increased friction can cause the engine to overheat and seize, leading to costly repairs.

Effects on Transmission
Transmission fluid and oil have different properties and functions, and mixing them can cause serious problems for your car’s transmission.
The additives in the transmission fluid can react with the seals and gaskets in the transmission, causing them to deteriorate and leak.
This can result in a loss of hydraulic pressure, making it difficult to shift gears and causing the transmission to slip.
Over time, this can cause significant damage to the transmission components, leading to expensive repairs or even complete transmission failure.

Signs to Watch Out For
If you’ve accidentally mixed transmission fluid and oil, there are some tell-tale signs to watch out for.
Unusual engine noises, such as knocking or ticking, can indicate that there is a problem with the engine’s internal components.
A burning smell coming from the engine or exhaust can be a sign of overheating, while discolored oil can indicate that the two fluids have mixed together.
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How to Fix the Problem
If you’ve mixed transmission fluid and oil, it’s important to take action immediately. The longer you wait, the more damage can be done to your car’s engine and transmission. Here are some steps you can take to fix the problem:
- Drain and replace contaminated oil: The first step is to drain the contaminated oil and replace it with fresh oil. Be sure to dispose of the contaminated oil properly.
- Flush the engine: In some cases, simply draining the oil may not be enough to remove all of the contaminated fluid. Flushing the engine with a specialized cleaning solution can help to remove any remaining traces of transmission fluid.
- Check for any related damage: Once the contaminated fluid has been removed, it’s important to check for any related damage to the engine or transmission. This may include inspecting the seals and gaskets, checking for leaks, and performing a diagnostic test on the transmission.
Preventing Transmission Fluid from Getting into the Oil
The best way to prevent mixing transmission fluid and oil is to follow proper fluid maintenance practices.
This includes checking fluid levels regularly, changing fluids at recommended intervals, and being careful when topping off fluids.
It’s also important to use the right type of fluid for your vehicle and to follow the manufacturer’s recommendations.
What are the symptoms of transmission fluid in the oil?
Symptoms of transmission fluid in the oil may include a burning smell, difficulty shifting gears, decreased engine performance, and a noticeable drop in transmission fluid levels.
How does transmission fluid get into the oil?
Transmission fluid can get into the oil if there is a leak in the transmission or if the transmission cooler fails, causing the two fluids to mix.
What happens if you ignore transmission fluid in the oil?
If you ignore transmission fluid in the oil, it can cause significant damage to the engine and transmission, leading to costly repairs or even engine failure.
How do you fix transmission fluid in the oil?
Fixing transmission fluid in the oil typically involves replacing both the engine oil and transmission fluid, as well as repairing any leaks or damaged components that caused the fluids to mix.
Final Word
Mixing transmission fluid and oil can have serious consequences for your car’s performance and longevity. It’s important to know the risks and take steps to prevent them from happening.
If you do accidentally mix the two fluids, be sure to take action immediately to minimize the damage and prevent costly repairs down the road.