Recently Rebuilt 4R100 Slipping; can I just replace clutch seals? - Ford Powerstroke Diesel Forum
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Old 01-16-2011, 06:43 AM
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Recently Rebuilt 4R100 Slipping; can I just replace clutch seals?

I've got a 4R100 in my '99 PSD that was rebuilt 15k miles ago and is now slipping pretty bad.

The fluid smells burnt but when I drained the fluid and dropped the pan there was no metal debris and no clutch seal debris.

The trucks pulls hard in reverse but slips in drive.

Can I do a sort of mini-rebuild and just replace the forward clutch seals in it?

I've noticed that there are rebuild kits that vary drastically in the number of parts that are in them.

If I were to do just the forward clutch seals would I save myself from having to buy the special tools and maybe a bit of time too or are they buried deep in the transmission?

Thanks!
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Old 01-16-2011, 08:28 AM
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You would still need the OD spring compressor tool. You might get in there and find more burnt clutches and I would replace all burnt clutches and steels. It is not hard to build the 4r100.
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Old 01-16-2011, 09:04 AM
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I've never taken an auto trans apart but now that I have two for my truck I'm ready to take the plunge.

I see that tool listed for $165 on a website which describes it as; "Allows for quick Assembly/Dis-Assembly of the Overdrive Cylinder from the transmission case. It also assists with the Assembly/Dis-Assembly of the Overdrive Cylinder Diaphragm Spring."

Is that the tool I would need?
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Old 01-16-2011, 10:10 AM
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If you're going to attempt this yourself, this is a good read....

http://www.powerstroke.org/forum/99-...-poor-man.html
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Old 01-16-2011, 01:57 PM
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Excellent, thanks!
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