Rebuilt 727 has debris in pan after only 500 km.

Jon Kriebel · May 25, 2021

Hello from Germany,

I hope someone can help me out. I rebuilt a A727 a couple of months ago. (Behind a 440). New bands, plates, checked all clearances etc. After 500 km, the pan was dropped, and what looks like iron filings were in the pan. The transmission makes no noise, and shifts fine.

Thanks for any insight on this.

AR67GTX · May 25, 2021

If it’s running OK I would just clean the pan out and install a new filter and drive it. Could be a problem or just some parts wearing in with maybe some poor rebuild hygiene and parts preparation by the builder. It wouldn’t take much that in the valve body to cause issues so hopefully it all got caught by the filter.

493 Mike · May 25, 2021

In my opinion that is excessive wear for your low miles of use. What made you drop the pan?
Mike

turbine68rt · May 25, 2021

Are you using a new or remanufactured converter or an old one with an unknown history?

JMILL67 · May 25, 2021

As already mentioned, is it an old used torque converter? Flushed out the transmission lines? Trans cooler flushed out and cleaned?

kiwigtx · May 25, 2021

Check the torque converter.....mine went bad also, and subsequent rebuild and flush sorted that problem out. :thumbsup:

69L48Z27 · May 25, 2021

Uh oh.

Jon Kriebel · May 27, 2021

493 Mike said:
In my opinion that is excessive wear for your low miles of use. What made you drop the pan?
Mike

The customer wanted a deep pan installed.

Jon Kriebel · May 27, 2021

AR67GTX said:
If it’s running OK I would just clean the pan out and install a new filter and drive it. Could be a problem or just some parts wearing in with maybe some poor rebuild hygiene and parts preparation by the builder. It wouldn’t take much that in the valve body to cause issues so hopefully it all got caught by the filter.

Well...I did the rebuild, the customer supplied the converter. I am suspecting junk from the converter.

493 Mike · May 27, 2021

Some of that debris looks like aluminum. Did you check it with a magnet?
Mike

Jon Kriebel · May 31, 2021

493 Mike said:
Some of that debris looks like aluminum. Did you check it with a magnet?
Mike

Yes, the particles are steel or iron....

493 Mike · May 31, 2021

Jon Kriebel said:
Yes, the particles are steel or iron....

That's more concerning to me. Depending on your circumstances, tear it down for a inspection or drive it until a failure occurs.
Mike

Dave6T4 · May 31, 2021

Steel comes from torque converter or rear sprag clutch. Pretty well everything else in a Torqueflight is aluminum.

Rebuilt 727 has debris in pan after only 500 km.

Jon Kriebel

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AR67GTX

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493 Mike

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JMILL67

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kiwigtx

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69L48Z27

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Jon Kriebel

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Jon Kriebel

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493 Mike

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