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Torque converter getting hot

Torque converter getting hot

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clayton
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Hi well I installed a torque converter in a D9 19A and it got hot very quickly so took the torque converter cooler out and looks like this hopefully is the problem. I’m assuming it probably hasn’t been cleaned since 1957 lol and the oil cooler as well! I will flush the cooling system and clean pressure test the coolers before installing any other things I should do? Thank you Clayton

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Mon, Sep 22, 2025 12:03 AM
neil
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Looks nasty Clayton! Should be an easy fix though - fingers crossed!

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Mon, Sep 22, 2025 2:09 AM
trainzkid88
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yeah well theres your problem i would soak it in a cleaning solution rather than mechanical means. see if your local radiator service will hot tank it for you. or make your own hot tank.

a immersion heater in a pot of oil sitting in a bigger vat of cleaning solution

"i reject your reality and substitute my own" - adam savage. i suspect my final words maybe "well shit, that didnt work"

instead of perfection some times we just have to accept practicality

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Mon, Sep 22, 2025 9:25 AM
Deas Plant.
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Hi, clayton.

If my memory serves me rightly, those early D9s also had an air cleaner for an air supply to the torque converter for additional coolnig. If there is one, have you checked that to see if it is restricted?

This photo shows the second air cleaner pre-cleaner:

https://i.pinimg.com/originals/77/74/4b/77744b014f7c44a8f1e5148c8d22ce7b.jpg

And this one:

https://live.staticflickr.com/65535/51644554374_48004159b2_z.jpg

Hope it helps. Also mighta bin for the master clutch.

Just my 0.02.

You have a wonderful day. Best wishes. Deas Plant.

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Mon, Sep 22, 2025 12:31 PM
bluox
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Reply to Deas Plant.:

Hi, clayton.

If my memory serves me rightly, those early D9s also had an air cleaner for an air supply to the torque converter for additional coolnig. If there is one, have you checked that to see if it is restricted?

This photo shows the second air cleaner pre-cleaner:

https://i.pinimg.com/originals/77/74/4b/77744b014f7c44a8f1e5148c8d22ce7b.jpg

And this one:

https://live.staticflickr.com/65535/51644554374_48004159b2_z.jpg

Hope it helps. Also mighta bin for the master clutch.

Just my 0.02.

Actually for the brakes.

Bob

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Mon, Sep 22, 2025 3:37 PM
clayton
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Hi Deas Plant Bluox is correct about the air cleaner it’s for the brake system. Bluox do you have any idea what the temperature difference should be on the torque converter cooler?

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Mon, Sep 22, 2025 5:02 PM
bluox
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Reply to clayton:

Hi Deas Plant Bluox is correct about the air cleaner it’s for the brake system. Bluox do you have any idea what the temperature difference should be on the torque converter cooler?

Just off the top of my head maybe 15 degrees.

Do you have a serviceman book?

Bob

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Tue, Sep 23, 2025 7:49 AM
clayton
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Okay this is the service manual I have it really doesn’t mention much of the torque converter cooler in it.

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Tue, Sep 23, 2025 9:07 PM
bluox
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Should be a trouble shooting chart in that book.

Your story needs more information.

If it heats without a load that sounds like a bad convertor or a valve problem.

Bob

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Wed, Sep 24, 2025 5:05 PM
clayton
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There is a troubleshooting section for the torque converter, for overheating in insufficient cooling it says to check the torque converter cooler for plugging which mine was about 85% plugged up! A question I do have is on the oil filter base where the oil cooler fits onto there are metal fittings that have rubber o-rings they are basically just pressed in the oil filter base but there is bolt holes on each side of the flanges which did Not have any bolts in them. Before I reassemble the oil and torque coolers I just want to verify that there isn’t a clamp or hold down missing. In my manual the oil filter base doesnt show any bolt holes on the base. I have attached pictures for a reference thank you Clayton.

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Thu, Sep 25, 2025 12:17 PM
clayton
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Thu, Sep 25, 2025 12:22 PM
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