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40 Deluxe · 07-23-2020, 02:46 PM

Look at the old seal closely for a part number. It may be on the lip of the seal itself. Or measure the inner diameter of the housing, the outer diameter of the flange, and thickness of the seal. Any decent parts house can find a seal number from those dimensions.
Most likely your junkyard rear end is from a different model. Most yards back then used Hollander Interchange Manuals which covered not only direct interchanges, but also how to adapt different years and different makes with minor changes (such as "use different u-joint" or "change yoke", etc. So going by original application may not work.

07-23-2020, 02:46 PM	#14
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,779	Re: 55 ford Ranch Wagon Pinion Seal Look at the old seal closely for a part number. It may be on the lip of the seal itself. Or measure the inner diameter of the housing, the outer diameter of the flange, and thickness of the seal. Any decent parts house can find a seal number from those dimensions. Most likely your junkyard rear end is from a different model. Most yards back then used Hollander Interchange Manuals which covered not only direct interchanges, but also how to adapt different years and different makes with minor changes (such as "use different u-joint" or "change yoke", etc. So going by original application may not work.