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Re: 1954 Packard rear end differential
#21
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54packpac
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Thanks again everyone for your comments. All is greatly appreciated. Mission accomplished. I replaced with 2 quarts of Royal Purple 85W-140 and 4oz of Bardahl gear seal. Interesting note...the copper crush washers I removed were smaller than the ones I received from M_x. I used the correct part# from M_x for what is supposed to be 7/8 OD x 5/8 ID copper crush washers. All in all pretty easy. The smelly dark gear oil I removed looked a little dubious. Thoughts are welcome.

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Posted on: 5/26 18:55
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Re: 1954 Packard rear end differential
#22
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BigKev
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Old gear oil is the smelliest stuff ever. The smell with penetrate through nyrtril gloves.

I heard that the old used some kind of animal fat that turns rancid. Hence the smell.

Posted on: 5/26 19:00
-BigKev


1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog

1937 Packard 115-C Convertible Coupe -> Registry | Project Blog
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Re: 1954 Packard rear end differential
#23
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humanpotatohybrid
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Probably because no one makes 5/8 ID washers anymore and they sent you 3/4 ID.

Doubt it will ever make a difference as long as they're torqued to spec and somewhat centered.

Posted on: 5/26 20:50
'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.
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Re: 1954 Packard rear end differential
#24
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54packpac
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Just a heads up. As I had no patience to wait. Our venerable vendor actually sent me 1.00 OD x 0.625 ID copper crush washers under part #433248. For $5.00 a washer. Today I received my copper crush washers from fittings.space/ dynapex. They were 7/8 OD x 0.625 ID and 0.75 cents a washer. These were an exact match to what I removed. Like Potato said, I hope this does not make a difference as long as torqued properly. The bolts do have blue monster PTFE seal tape on them. I drove in multiple parades this weekend. So far no leaks. Fingers crossed.

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Posted on: 5/28 19:23
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Re: 1954 Packard rear end differential
#25
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humanpotatohybrid
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It seems that leaks mostly come from the large case seal which is simply a huge square O-ring. I added it to the parts cross reference, FYI.

Posted on: 5/28 20:42
'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.
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Re: 1954 Packard rear end differential
#26
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54packpac
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Side note, is the engine oil pan drain plug the same size and use the same size crush washer as the 2x plugs for the rear differential?

Posted on: 6/10 10:01
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Re: 1954 Packard rear end differential
#27
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humanpotatohybrid
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Yes, and this can be checked in the parts book

The same plug was used on nearly every engine, Ultramatic, and diff case 48-56

https://packardinfo.com/xoops/html/modules/partslist/index.php?mode=partnumber&SearchValue=426205&ButtonLookup=Go

Posted on: 6/10 10:06
'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.
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Re: 1954 Packard rear end differential
#28
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54packpac
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Thank you. I wanted to make sure I wasn't seeing things when I looked in the parts book as I did see it multiple times.

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Posted on: Yesterday 8:08
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