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NP231D shim (bonded) gasket

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Old Jul 29, 2023 | 11:43 PM
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Default NP231D shim (bonded) gasket

Hi. Regular lurker here. I have a 1999 Dodge Ram 1500 4x4. The transfer case was leaking so I pulled it apart and found a tear in the rubber on the bonded shim gasket at the tail housing. Does anyone know where I can get a new one. Everywhere I’ve looked shows them out of stock with no expected return date. Will a cork gasket work in its place? If so, what thickness should I get to make sure everything goes back together correctly?

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Old Jul 30, 2023 | 08:36 AM
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Can you measure the thickness of the original gasket??

If it is just for the tail housing, I don't think its a real critical dimension.....
 
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Old Jul 30, 2023 | 03:02 PM
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Yep, comes in a tube and has something to with Spock at room temp.....
 
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Old Jul 30, 2023 | 11:17 PM
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Originally Posted by HeyYou
Can you measure the thickness of the original gasket??

If it is just for the tail housing, I don't think its a real critical dimension.....
Originally Posted by Keith_L
Yep, comes in a tube and has something to with Spock at room temp.....
The shim thickness is .063 and according to TorqueKing “is both a shim and a gasket. The metal plate insures correct mainshaft to input shaft spacing is maintained and the raised rubber ring forms a leak-proof seal between your rear case half and rear bearing retainer.

it looks like this:





 
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Old Jul 31, 2023 | 11:44 AM
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This is for the slip shaft tail housing?

How does it have anything to do with input shaft?
 
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Old Jul 31, 2023 | 01:06 PM
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Originally Posted by Keith_L
This is for the slip shaft tail housing?

How does it have anything to do with input shaft?
That's what I was wondering..... Why would an eighth of an inch matter on that??
 
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Old Jul 31, 2023 | 03:48 PM
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That goes between the main shaft rear bearing retainer and the rear case, so it would shim something. However, there is no tapered bearings, so I don't know what difference it would make. Can't find any seal/gasket kit that would have that. And looking at the picture of my t-case in pieces on the floor, all I see is RTV on the rear bearing retainer. Can't recall there being any kind of shim.
 
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Old Jul 31, 2023 | 04:00 PM
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the gasket goes here. I’m not sure what if any difference it makes, but I don’t want that little bit of space to cause a complete failure of the transfer case.




 
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Old Aug 1, 2023 | 07:33 AM
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This place his a 'complete' kit for less than 20 bucks.
 
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Old Aug 1, 2023 | 02:23 PM
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I think this is the gasket you are looking for from Jegs summit or ebay. It is the only thing that looks the same however it says form 2002-2012

Mopar Transfer Case Gasket 5086042AA

 
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