Differential part numbers
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Differential part numbers
Pulled a Mr. Butterfingers and dropped the magnet that goes inside the differential . It's now in four pieces 
, having a hard time finding any part number or one for sale. Anyone know if these are sold or do I just need to find something close in size?
While I'm looking for part numbers anyone know the number for replacement drain and fill plug gaskets for the diff?
, having a hard time finding any part number or one for sale. Anyone know if these are sold or do I just need to find something close in size?While I'm looking for part numbers anyone know the number for replacement drain and fill plug gaskets for the diff?
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Thanks for the help. It does list it as for an automatic fluid pan but from what I can see the size is about right. I got some Chinese ones that are for an Allison transmission coming also that measure correct. I'll update with what one fits better.
What's everyone using for fill/drain plug gaskets?
What's everyone using for fill/drain plug gaskets?
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Joined: Jan 2007
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From: Dyer, IN
Thanks for the help. It does list it as for an automatic fluid pan but from what I can see the size is about right. I got some Chinese ones that are for an Allison transmission coming also that measure correct. I'll update with what one fits better.
What's everyone using for fill/drain plug gaskets?
What's everyone using for fill/drain plug gaskets?
Thread Starter
Instructor
Joined: Oct 2020
Posts: 139
Likes: 45
The automatic transmission pan magnet part number 29535617 is not quite thick enough, feels like it will rattle around and maybe shatter over time.
magnet width is about 1.750
magnet thickness
The original came in at .262
GM auto trans pan came in at .159
some thick ones that are used for the same purpose came in at .317
I opened up my manual transmission and those magnets appear to be the same size as the diff and are available. I will order one when I finish taking apart the transmission and update if that is what I use.
As for the crush washers mine are mangled and not much left. I used sealant when I got the car and changed the diff oil. It did not leak but I don't want to constantly do that. The size is appreciated that's what I ordered to save myself from paying likely 8 dollars for one at the parts giants.
magnet width is about 1.750
magnet thickness
The original came in at .262
GM auto trans pan came in at .159
some thick ones that are used for the same purpose came in at .317
I opened up my manual transmission and those magnets appear to be the same size as the diff and are available. I will order one when I finish taking apart the transmission and update if that is what I use.
As for the crush washers mine are mangled and not much left. I used sealant when I got the car and changed the diff oil. It did not leak but I don't want to constantly do that. The size is appreciated that's what I ordered to save myself from paying likely 8 dollars for one at the parts giants.
Last edited by C5Mat; Mar 13, 2026 at 06:19 PM. Reason: made note of manual transmission
Thread Starter
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Joined: Oct 2020
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The magnet from the T-56 came in about .007 thinner than the original. That is what I ended up using all the others I found were much thicker or thinner.
The crush washers seem to work. Just went with some 20mm that said they fit a hondoo from the jungle store.
Thanks for the help. Hope this helps someone in the future.
The crush washers seem to work. Just went with some 20mm that said they fit a hondoo from the jungle store.
Thanks for the help. Hope this helps someone in the future.
