How to Change Automatic Transmission Fluid and Filter in a Subaru

Subaru Service: Changing Your Transmission Fluid and Filter

Servicing your Subaru yourself is an ideal way to learn more about your car, coupe or SUV. It is also a way to save a few bucks on your yearly maintenance costs. In order to change your automatic transmission fluid, you will need some supplies. A few of the supplies that you will need to get this job done are:

  • A Socket Wrench with a 17mm Head or a 17mm Wrench
  • Transmission Funnel
  • Drain Pan
  • Transmission Fluid
  • Oil Filter
  • Paper Towels or Rag

There are a variety of Subaru models available. Depending on whether you have a Subaru Impreza, Subaru Outback, Subaru Forester or another Subaru model then you may need different transmission oil, filter and even the exact location of your transmission pan may be different. Check your driver’s manual for more information on the particular supplies needed to change your transmission fluid and filter.

Once you have all of your proper supplies, you will need to get under your Subaru and locate the drain plug, it tends to be located on the driver’s side. The first step is to position your pan under the transmission and unscrew the 17mm bolt to drain the transmission oil. Above the drain plug, you will notice a white Subaru filter. That is the transmission filter. Be sure to remove that as well.

A helpful trick that you can use to figure out how much transmission fluid you will need to replace is to wait until all of the fluid has drained. Next, take your used fluid and pour it into an empty transmission fluid container. This will help you determine how much you will need to pour in to match it. Another handy tool is also your driver’s manual, which will give you an exact number.

Before putting the new filter in be sure to take a little oil and lubricate the rubber gasket around the filter so it seals better

Once the fluid has drained, put the plug back in. Before putting the new filter in be sure to take a little oil and lubricate the rubber gasket around the filter so it seals better. This trick also makes it easier to put on and take off. Once the oil and filter are on, locate your transmission dipstick tube near the master cylinder. Put your transmission funnel where the dipstick would go and fill your Subaru with the proper amount of transmission fluid, about slightly above three quarts. Be sure to check the fluid levels using the dipstick.

The final step to changing your Subaru transmission fluid is to turn the car on and shift through the gears. This will allow the fluid to circulate through the transmission properly. Do this a few times to ensure that the fluid has spread properly.

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