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Auto Trans Drain and Fill Question

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I drained the tranny fluid, cleaned and replaced filter/gasket, and refilled with Dexron VI according to spec yesterday.

Since i'm going for multiple drain/fills to bring my fluid up to specs, do I need to replace the filter/gasket each time I drain and fill or can I just literally just drain and refill with fluid?
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Usually 3 drain-refills gets it mostly clean. I would have changed the filter in the last drain-refill but that's just me. You need to change the filter just once.
Did you put medium strength threadlocker on the tranny pan bolts? they would get loose with time otherwise.
 

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Discussion Starter · #5 ·
Thanks guys ... I ended up disconnecting the transmission return line from the radiator and flushed via the trans pump with engine running.

Pure, clean Dexron VI (backwards compatible with Dexron III) in the trans. Noticeably smoother for sure.

Also, some searches call for Toyota Type IV, but thats for 4wd autos. 2wd requires Dex III or equivalent.
 
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