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Transmission Drain or Flush?

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Old Jun 18, 2016 | 09:46 PM
  #1  
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Year: 97 SE
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Default Transmission Drain or Flush?

I honestly plan on draining and refilling my 97 Jeep XJ. I just hit 212k miles and I think its in time for a change. I have done the oil/transfer case and both differentials a month ago.

Would you guys recommend what I said to drain and refill like 3 times over a week? Or do a flush? I have heard of issues with high mileage transmissions getting flushed causing big problems.

Is it very easy to drain and refill a few times? Would love opinions. There's a drain plug right?

Thanks,

Jay

Last edited by jaydubz; Jun 18, 2016 at 09:57 PM.
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Old Jun 18, 2016 | 11:15 PM
  #2  
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Don't flush it. I get people at work asking me all the time to do a flush and if it's over ~140k I refuse to do it. Too many lpotential problems. I would only flush a transmission if it had been kept up per manufacturers spec from day one. 99% of the time it hasn't.
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Old Jun 19, 2016 | 01:46 AM
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Would you guys recommend what I said to drain and refill like 3 times over a week?
Yes. And yes there's a drain plug.
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Old Jun 19, 2016 | 01:53 AM
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Originally Posted by Radi
Yes. And yes there's a drain plug.
Didn't know that, that made my life much easier haha. Thanks
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Old Jun 19, 2016 | 04:52 AM
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Originally Posted by DeltaOP4
Don't flush it. I get people at work asking me all the time to do a flush and if it's over ~140k I refuse to do it. Too many lpotential problems. I would only flush a transmission if it had been kept up per manufacturers spec from day one. 99% of the time it hasn't.
Originally Posted by Radi
Yes. And yes there's a drain plug.
When I first got my '00, with 147K, I was able to determine that the PO had the system done at 105K. He had the work done at my Jeep Dealership that is a customer of the auto parts store I work at. They were more then happy to tell me what had been done to her. I just gave them the VIN. I have heard the same thing that DeltaOP4 said. It is sometimes all the gunk in there that is holding the tranny together. Sounds like way back when you used to put saw dust in a tranny to get it too work a little longer. LOL. So I didn't flush but dropped the fluid through the drain plug, tapped the ignition to bet a little more out, dropped the pan (Might need to hit the O ring that is holding the filler tube in the elbow that is attached to the pan with a little heat to separate. They get all hard and crusty in there) , replaced the filter, if you could call it that, the gasket, reassembled, and refilled. Now every two years I drop whatever fluid will come out of the drain plug, don't even tap the ignition, and refill. Do the transfer case too.
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Old Jun 19, 2016 | 07:58 AM
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Use the correct fluid though.
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Old Jun 19, 2016 | 12:07 PM
  #7  
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Dex III right?
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Old Jun 19, 2016 | 01:43 PM
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Originally Posted by jaydubz
Dex III right?
Yup.
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Old Jun 19, 2016 | 02:00 PM
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See my sig, #3.
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Old Jun 19, 2016 | 02:02 PM
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Originally Posted by BlueRidgeMark
See my sig, #3.
You have one of the best sigs ever.
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Old Jun 20, 2016 | 06:36 PM
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Originally Posted by cruiser54
You have one of the best sigs ever.
Agree. Just add #6: If you own a Renix, refer to Cruiser 54's Tips

Off topic: Cruiser, I noticed you added a couple tips since I checked in last . I'll have to add the fuel pump ground!
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Old Jun 20, 2016 | 08:24 PM
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My dang drain plug is stripped from top to bottom, it just keeps spinning and spinning and spinning. No power tools either, it's gonna be a bear to get off.

Last edited by cruiser54; Jun 20, 2016 at 10:57 PM.
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Old Jun 20, 2016 | 08:31 PM
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Please watch the "GD" , my kids read this. Thx.
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Old Jun 20, 2016 | 08:43 PM
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Originally Posted by BillyBoy
Please watch the "GD" , my kids read this. Thx.
Your kids read this but in your sig, you talk about thinking of your XJ while you bang your wife. alright bud.
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Old Jun 20, 2016 | 09:44 PM
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Originally Posted by jaydubz
Your kids read this but in your sig, you talk about thinking of your XJ while you bang your wife. alright bud.
very excellent response and on the point.
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