transmission maintenance

Drop the pan, change the filter. This will replace about 4-5 quarts of fluid. Or you could do a full flush if you want, but you'll need to take it somewhere to get that done. If you're the type that's willing to drop the pan and change fluid every 10-20k (depending on driving style/type), you really don't need a full flush.
Just be careful not to over tighten the trans pan bolts when you reinstall.
go to any trans guys and they will tell you the same. because if it hasnt been done since the early life of the car. their could be built up metal shavings and a flush will push them all through the tranny.
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