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Hello. I have an NOS Packard rear end in the original box. I can't find any part number on the box but there are several numbers on the unit itself.

Stamped on the side of the housing near the drive shaft side is:
8 24 56
20770 1X

On the gear itself in red is "M112".

The housing has casting numbers that read "434951" and "75".

Any help in identifying this would be appreciated.

Thanks Jeff

Pictures help

Because of the late casting date and a typical Packard casting number, will go out on a limb and say 55. If the foundry was still in operation, it had to be near the end by then so perhaps they made a run for service stock.

I base the guess on the casting number being one lower than a bare machined and finished 55 carrier & cap assy. Others might have a reference to the remaining numbers but I have none. If no one has the other info, counting the teeth to determine a ratio might give more clues as to which models it was destined for.

Here are some pictures. This is my first attempt so let's hope it works.













Thanks Jeff

That is for a 55 Packard or Clipper judging by the style of input yoke. Can only tell if Pack or Clipper by counting the internal splines in the spider gears, and those numbers I don't remember offhand.

The ratio is easy to tell as it is stamped on the edge of the ring gear, right near where it says Packard in script. Probably right near that red mark. Love to know what it is.

Were the 55's the same as 54's?

Here are the numbers that I see along the edge of the ring gear:

6 19 56 DANA 30596 A3B6 39 11

Looking at these numbers, I'm thinking that the ratio might be 39 divided by 11 = 3.54.

Does this help us ID the rear?

Thanks Jeff

The pumpkin will fit all 53-55 if you put on the right yoke.

Yes, the ratio is 3.54, but I have never seen a Dana made gear in a pre 56 Packard dif. Must be service stock.

The one thing we still don't know to ID it is the size of axle shafts it is made to accept. If small, then 54 and 55 Clipper. If big, then 53-55 seniors. 3.54 was very common on 55 big cars.

Thanks Gentlemen.

Ross, is there a way to determine the size of the axle shafts?

Also, what would be the value of this item?

I am looking to sell this Packard rear end. What should I ask for it? Any trades for Studebaker parts? Thank you.