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I am new to this forum. I believe I posted in the parts or looking for section of the site but hoping someone on here may be able to help me find a better condition ring and pinion for my packard. I’m not sure what forum is best for getting as many packard owners to see this post. I am happy to hear from anyone that can help. I believe the set is dated 6-28 or 6-29. It is a 57 tooth ring gear and 13 tooth pinion. Mine is very pitted and I’m hoping to find a better set to install in my differential. Does anyone here have a set or know where I may find a decent used replacement. I have looked into having a set made and it is just not in the budget. Thank you all in advance.

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That is the 4.38 ratio standard on the open cars. I think the best you can hope to find is the 4.69 closed car ratio.

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Is that because the 4.38 is more desirable and they have all been used up or is there physically less of them "out there"? Any experience using the 4.69? Is the RPM extremely high at higher speeds? If I was able to find a good 4.69 to use would that be a mistake? Thank you.

depends on how fast you want to go. the 4.38 is of course preferable for todays roads, but I predict the chances of finding one are far far less than a 4.69.

The 4.38 was the open car ratio and they built fewer of those cars. It was standard on roadsters, phaetons, and tourings.

A few potential sources:

https://www.etsy.com/listing/216669593/ring-and-pinion-gear-1931-packard-model

https://www.edlservicesllc.com/o-r-f-manufacturing

https://julrichpackard.com/

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Thank you. I will look into these.

You might try posting in the Packard Club forums as well:

Packard Club forum, driveline, rear axles, etc.

Did you see this post?

Packard 626/633 Differential Available

Thank you for the info. I will look into it.