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  #1  
Old 03-10-2018, 10:29 AM
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Default Torque converter question

Hi all
I dropped the transmission this morning and have a question. If I hold the centre of the torque converter I can move the converter maybe 1/8 inch or more up and down. Is that normal ? Doesnít seem right to me but Iím not familiar with COMís. As always, appreciate your comments.
Jon
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  #2  
Old 03-10-2018, 10:53 AM
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Many times the front pump bushing is worn. I would replace it along with the front pump o-ring and the front seal. A worn bushing will cause even a new seal to wear and leak.

John
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Old 03-10-2018, 11:27 AM
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Thanks John
Are all the bits readily available through the usual suppliers ?

Jon
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Old 03-10-2018, 11:43 AM
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The front seal is readily available. My local transmission shop was able to get the other parts without any problem but I don't know what source they used.

John
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Old 03-10-2018, 12:07 PM
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Thanks John
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Old 03-10-2018, 12:38 PM
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You're welcome. If you can't find the parts let us know. I'm sure we'll be able to track them down.

John
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Old 03-10-2018, 02:24 PM
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Your torque converter is centered and bolted directly to the flex plate (and the crankshaft). The transmission case is dowel pinned and bolted to the engine block.

If you think about it, 'slop' between the two is very confined. I've seen plenty of failed seals but never heard of 'slop' as being a cause or an issue. When transmission bearings wear, it's the internal end that is usually the cause because those parts slide on a splined shaft. Worn engine bearings can cause the transmission's front bearing and seal to fail. - Dave
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Old 03-10-2018, 02:40 PM
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Mmmmm good point Dave about the converter being fixed so there shouldnít be any run out that would cause an issue with the pump bushing. Iíll investigate a bit further next week.
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Old 03-10-2018, 02:55 PM
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Right Joh, it's a 'system' because the engine and trans are dependent on each other.

The center crankshaft bearing is a thrust bearing that allows a little lateral motion. The torque converter uses a center-shaft that is splined to allow for that same crankshaft motion.

When ever I marry the engine and trans, I always install the torque converter to the transmission first, then rotate the flex plate as I offer the trans to the engine and tighten the four converter nuts. This prevents damage between the pump and converter.

I also mark the flex plate and converter before disassembling, just so I don't cover the converter's drain plugs by using the wrong flex plate holes. - Dave
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Old 03-10-2018, 08:02 PM
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All that being said when I had the transmission in my '59 redone he showed me the old front pump bushing and there was very little left of it. He said that caused the new front seal that I put in to leak. Since he's been doing Ford transmissions for over 50 years I have no reason to doubt him.

John
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