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Q: How do I replace the transmission filter on my 1986 Chevrolet Caprice station wagon 305? The transmission is having a hard time shifting. I want to replace the filter myself, how do I go about doing it?
A: Take the trans oil pan off, Have an oil catching pan under it. Change the filter, replace the gasket and oil pan, Then add new oil, if you are unsure about this procedure I’d recommend getting transmission services.
You should also go to your local parts store and purchase yourself a Haynes Manual for your specific vehicle. It retails for about $15. It has colored illustrations and complete information on how to completely rebuild your vehicle from top to bottom.
Now if it has been a long time since the fluid has been changed you may do more harm than good. The old fluid in there is thick and gunked up which actually helps the worn out bands.
Removing the thick fluid and replacing it with clean thin fluid will more than likely cause the transmission to go out for good. Transmission fluid should be changed about every 25,000-30,000 miles.