1951 Pontiac Chieftain

[Junkman]

I bet the epicyclic stuff is as new. What you have there looks like brake band debris.
What's the spares situation for these?

[PhilA]

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So long as it isn't the center bearing (doesn't look to be), it's the clutches. Looks like it has been sticking and attempting to engage 2 gears at once and burned the clutches up.

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Further disassembly required, but everything is out of the case. The bands even look in moderately good shape.

Phil

[PhilA]

I bet the epicyclic stuff is as new. What you have there looks like brake band debris.
What's the spares situation for these?

The bands still have a fair bit of life in them. Bands are difficult to obtain but epicyclic clutches are available, both the steel and friction parts.
Someone has backed the primary band off a fair bit, it was loose as hell. That won't help the situation.

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I'm going to open the drums up to inspect- have gone this far, I consider it unwise not to. But, if they are new and someone had it apart, the swarf has come from somewhere. I can't see them slathering that blue sealant all over everything and not cleaning the pan.

Phil

[Junkman]

You give them too much credit.

[PhilA]

True. They did cover everything in that crap.

Including the intake pipe to the rear pump where it sits in the mesh gauze.

INSIDE the gearbox. Le sigh.

Which is why I think it's prudent to inspect inside the drums...

Phil

[PhilA]

Well, there are my fears, confirmed.

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Pulled the snap ring off and removed the rear epicyclic drum.

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There's the source of the swarf.

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That's had it. Gonna be looking for a replacement bearing center and drum- front one still needs to come off for inspection. Looks like the ring fractured and started hastily removing the bearing surfaces.

Phil

[Junkman]

I have no idea what it is called in English, but you need a machine shop equipped with this: https://www.ibeda.com/de/flammspritzpistolen

[Eddie Honda]

Spray forming / metal spraying / spray metallizing / plasmaspray / arcspray.

https://www.google.com/search?client=ms ... r-3Jb6-AUY

[PhilA]

I've been given a lead to a Hydra-Matic specialist in New Jersey- FATSCO- who may be able to help.

If not then yes, it may be able to be machined. I prefer the new old stock approach of possible in this case, that's buried waaaaayyyyy deep and is a pain to pull apart again.

Phil

[PhilA]

The exploded diagram shows the bearings are sleeved.

If that's actually the case then that's a fairly easy fix.

Phil