Mechanics

HOW TO PROPERLY CHECK TRANSMISSION FLUID AND HOW OFTEN DO I NEED TO CHANGE IT?

1998 Mazda b2500 • 85,000 miles

I just bought a used Mazda truck. It currently has 85,000 miles. The other day I checked the transmission fluid and it appeared way over the full line on the dipstick. I was wondering if the fluid has to be checked while the engine is running or at least warm. I checked the fluid in the morning on a cold engine that had not been turned on since the night before. Also, how often do I need to change the fluid and filter? Thanks.
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Hymefly
August 9, 2012.



Drive it a few blocks and then check it while engine is idling-fluid and filter change about 30K miles

Rasmataz
Aug 9, 2012.