DMS Basics - Step-by-Step Guide to Changing Transmission Oil – DMS Fasteners
  • Free Shipping Across Australia

  • Housing 50,000,000+ Pieces

  • Dispatch Hubs in All States

  • Trade Facilities Available

DMS Basics - Step-by-Step Guide to Changing Transmission Oil

DMS Fasteners |


The information provided in these instructions is on an "as is" basis without warranties of any kind, express or implied. The author disclaims all liability for any actions taken or not taken based on this information. Users are responsible for their own actions and decisions based on these instructions. This disclaimer includes, but is not limited to, any direct, indirect, incidental, or consequential damages. By using these instructions, you acknowledge and agree to this disclaimer. If you do not agree, do not use the provided information.


Regularly changing your transmission oil is essential for maintaining smooth shifting, prolonging the life of your transmission, and ensuring optimal performance of your vehicle. While it may seem like a daunting task, changing transmission oil is a straightforward process that can be done at home with basic tools and supplies. In this comprehensive guide, we'll walk you through the step-by-step process of changing transmission oil, empowering you to take control of your vehicle's maintenance and keep it running smoothly for miles to come.

1. Determine the Correct Transmission Oil

Before you begin, it's crucial to determine the correct type of transmission oil for your vehicle:

  • Consult the Owner's Manual: Refer to your vehicle's owner's manual to find the recommended type and viscosity of transmission oil.
  • Research Compatibility: Ensure that the transmission oil you choose is compatible with your vehicle's make, model, and transmission type. Different transmissions may require different types of oil, so it's essential to use the correct one.
  • Consider Synthetic Options: Synthetic transmission oils offer superior performance and durability compared to conventional oils, especially in extreme temperatures and heavy-duty applications.

2. Gather the Necessary Tools and Supplies

Before starting the transmission oil change, gather the following tools and supplies:

  • Transmission oil pan or container
  • Wrenches or socket set
  • Funnel
  • Safety glasses and gloves
  • Jack and jack stands (if necessary)
  • Clean rags or paper towels

3. Prepare Your Vehicle

Before draining the transmission oil, take the following preparatory steps:

  • Park your vehicle on a flat, level surface and engage the parking brake.
  • Allow the engine to cool down to avoid burns from hot oil.
  • Place wheel chocks behind the rear wheels to prevent the vehicle from rolling.
  • If necessary, use a jack to lift the vehicle and support it securely with jack stands.

4. Drain the Old Transmission Oil

Next, drain the old transmission oil from the transmission:

  • Locate the transmission oil drain plug on the transmission pan. Refer to your vehicle's owner's manual for the exact location.
  • Place the transmission oil pan or container underneath the drain plug to catch the old oil.
  • Use a wrench or socket set to loosen and remove the drain plug in a counterclockwise direction. Allow the old oil to drain completely into the pan.
  • Once the oil has drained, clean the drain plug and reinstall it securely.

5. Refill with New Transmission Oil

After draining the old oil, refill the transmission with fresh oil:

  • Locate the transmission oil fill plug on the transmission. This plug is typically located higher up on the transmission housing.
  • Use a funnel to pour the recommended amount of new transmission oil into the transmission through the fill plug opening. Refer to your vehicle's owner's manual for the correct fluid capacity.
  • Once the transmission is filled to the proper level, reinstall the fill plug securely.

6. Perform a Final Check

After refilling the transmission with new oil, perform a final check to ensure everything is in order:

  • Double-check that both the drain plug and fill plug are tightened securely to prevent leaks.
  • Clean up any spills or drips with a clean rag or paper towels.
  • Lower the vehicle from the jack stands if necessary and remove any wheel chocks.
  • Dispose of the old transmission oil properly at a recycling center or automotive parts store that accepts used oil.


Changing transmission oil is a simple yet essential maintenance task that can help ensure smooth shifting and prolong the life of your transmission. By following the steps outlined in this guide and using quality transmission oil, you can maintain optimal performance and reliability of your vehicle's transmission for miles to come. Enjoy the peace of mind that comes with knowing your transmission is well-maintained and ready to tackle the road ahead with confidence.