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To tranny flush or not?

  #61  
Old 04-06-2017, 06:49 AM
Join Date: Feb 2009
Location: lakeland fl
Posts: 2,428
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I would drop the pan change the filter and top it off. if it still feels the same after a while I would do it again to try to clean every thing out of there. as in try to get what ever the new fluid pushed through. it would be cheaper to start with second if it feels like it still has a long shift there might be a silinoid or the nutral safty switch they might be a play on it. when I had a long shift I replaced the safety switch and the fluid twice on how funky the pan looked when I dropped it. there was some worn things I didn't want floating around after I did it. the shifts seem to be better when driving
 
  #62  
Old 05-12-2018, 09:07 PM
Join Date: May 2018
Location: Chicagoland west burbs
Posts: 10
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Here's what I can tell you from personal experience

On my monte, I did a flush at 100k miles and discovered that there was gunk in the valve bodies, or somewhere, and it literally grenaded my trans. I saw the internals, there were shards, the 3rd and 4th gear clutch pack lubrication channels got clogged, they starved, and something broke. How they still engaged and moved the car was a miracle.

At 50K's... I would be cautious. If you have a shop that can do a thorough flush, I would do it. I might even recommend dropping the trans out and opening it up, take out the valve bodies and other channels and make sure there's no gunk in there.

If your car was supercharged, I would recommend taking the trans to a speed shop and building it up as the 4T65E-HD can be fragile, and is a time bomb if you're making anything more than stock power, but if I remember right, there was no supercharged options in 02.
 
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