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Message: <blockquote data-quote="AuroraGirl" data-source="post: 27929" data-attributes="member: 9417">Unfortunately,..yes… [URL unfurl="true"]https://www.silveradosierra.com/threads/4l80e-transmission-component-slipping-p0894.780631/?post_id=7620270#post-7620270[/URL]Most likely a situation I can fix with dropping the valve body and working the regulator bore and valve with nick’s recommended fix. But it may also be torque converter wear.  The truck needs to get me to summertime lol.  The fluid was slightly low from leaky hoses. I reused the retainer clips, which is also a big no no (1 time use) , and lost one so I used one from a 2005 Grand Prix.  Which was slightly too big I think, so slightly weeps still but not leaky like before.  I noticed I now have a torque converter drain down after a couple days, reverse doesn’t engage for a few moments and is almost like it’s a higher gear(so less quick movement and feels like low power. I’m not sure where the trans does the drain back bloc, but it likely means it’s stuck open from this stuff</blockquote>