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Message: <blockquote data-quote="Dreman" data-source="post: 777062" data-attributes="member: 61303">I put a drain plug in the tranny pan, and change the fluid in the pan every other oil change.  The first time you get about half of the old fluid.  The second time you get about half old fluid and half new fluid, so 75% of the old fluid is changed.  The third time 87.5% and so on.  And change the trans filter when it says to in the manual.  My Trac has 140k and going strong with this method.  My GMC went to 283k with the factory trans before I sold it, with a funny noise in the trans, but still going.  The new owner says I shouldn't have sold it.Others will disagree, but this works for me.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /></blockquote>