How to Clean a Transmission Filter

If you have an old car and the factory no longer produces spare parts for it, you may have no other option but to clean the transmission filter. This part is usually changed every so often, but if the parts are not available for purchase, you need to clean it for the smooth operation of your car.


  • Bench Grinder
  • Wrench Set
  • Pan
  • Disc Brake Cleaner
  • Toothbrush
  • File
  • Crimper and Crimping Metal

Step 1: Preparation

Lift the car using a jack or go under it, whichever is more convenient. You will be able to access the transmission filter from underneath the car.

Step 2: Remove the Filter

Remove the filter by undoing the bolts that fasten it. Take note how it was installed and assembled so you can return it exactly the same way later. Remove the crimps holding it closed using the bench grinder. Detach the two parts of the filter.

Step 3: Clean the Filter

Put the two halves on the pan and spray disc brake cleaner so the dirt and metal particles will drip on to the pan. Any excess dirt can be brushed away using the toothbrush. File the edges of the filter to make it smooth again.

Step 4: Reassemble the Filter

Reassemble the filter and join the two parts together and place crimping metal again to hold them together. Return the transmission filter and attach it to the car.