Updated at: 12-08-2022 - By: Lucas

The amount of data displayed on modern instrument clusters is unprecedented. Self-diagnosis systems have evolved from a few critical warning lights and a check engine light to self-diagnosis systems that tell you exactly what’s going on.

There is a limit to how hot the automatic gearbox oil can get. The only other option is to drive or tow your car to a Subaru dealership or service to get the problem fixed.

Why Is The AT Oil Temp Light Flashing?

AT Oil Temp Subaru

To see whether there is an issue with the transmission’s oil, the A/T oil temp lamp will turn on and begin to flash. Transmissions are nothing more than a collection of gears housed in a container. The clutch is responsible for transferring power from the engine to the transmission.

Although the engine’s crankshaft spins at varying rates, its output is always the same. When the transmission is in fourth gear, the direct drive or 1. gear ratio occurs. This means that if the car didn’t have a transmission, it would be stuck in fourth gear all the time, making it nearly hard to move.

Why lower gears exist is because this is the case. They convert a large number of engine revolutions into a single wheel rotation. Increasing the top speed of the car is made possible by using overdrive, which is the highest gear.

The transmission is a power converter, not a power generator, thus it’s important to know all of this. It’s made to work in a controlled setting, like a room.

What To Do When AT Oil Temp Light Flashes?

When you see a warning light with the word oil in it, pull over immediately and turn off the engine, as I explained in the post on the engine oil light (which you can find here).

There are no exceptions to this rule. Even though the airflow under the car helps to keep the transmission fluid cool, it’s not enough. As quickly as possible, stop the pieces from moving.

How To Fix AT Oil Temp Problem?

AT Oil Temp Subaru-2

I’m a big proponent of do-it-yourself auto repairs if you’ve read any of my other articles on Vehicle Freak. With the money you would have paid a mechanic, you may learn a new skill and stock up on new tools in your garage.

However, there are some fixes that can’t be done at home. Changing the gearbox oil may seem similar to changing the engine oil, but it is a completely other animal. You can observe just how much labor and talent goes into changing the oil in the following video guide.

There are defined intervals for changing the gearbox oil. You should keep a record of when you last changed your oil and how often you should do it. You may have a mechanical problem with your transmission, which can only be fixed by a trained specialist.

How Much Does It Cost To Repair Subaru Transmission?

AT Oil Temp Subaru-3

The powerplant of a Subaru is very expensive to maintain. The cheapest option is a fluid transmission change, which costs roughly $200.

It’s difficult to estimate the repair costs without knowing exactly what needs to be fixed, but you should anticipate to pay at least $1,000 and up to $2,000 on average. Up to $3,500 might be spent on a comprehensive transmission restoration or replacement.

Get the vehicle examined and have your transmission oil checked up. Assuming that the issue isn’t resolved, the vehicle’s current worth may be as high as $3,000 in repairs. If the numbers don’t add up, sell the automobile and use the money to buy a new one.


Does Subaru have an oil change light?

Subaru, like every other automobile manufacturer worth their salt, ensures that each of its models comes equipped with an oil change light or, at the very least, a service indicator. There are several benefits to keeping track of your own upkeep and repairs, including improving the value of your home when you sell it.

Why is my transmission fluid getting hot?

The presence of hot transmission fluid may suggest a low oil level or a mechanical problem that is causing friction and so increasing the temperature of the fluid. Regardless of the situation, having it inspected and repaired by a mechanic is always preferable to doing it yourself.

What temperature is too hot for a transmission?

Subaru gearbox fluid is typically kept at a temperature of 175 degrees Fahrenheit at all times. Anything above 200 degrees Fahrenheit is regarded to be dangerous.


I don’t want to disappoint you by directing you to a mechanic, but in some circumstances, that’s the best and only option.

Mechanics at the local jack of all trades refuse to work on transmissions since they’re too complicated for the average person to handle. In order to find and fix the problem, contact a dealership or a Subaru mechanic.