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T18 w/ 4wd gaskets

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Old Apr 2, 2025 | 10:22 AM
  #1  
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cgil87
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T18 w/ 4wd gaskets

Hey guys where do I buy a gasket set for the t18 transmission? I need the gasket that goes between the transmission and the transfer case. If there are different ones, how do I identify with xfer case i have? I'll throw some pictures in maybe yall know.



 
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Old Apr 2, 2025 | 10:28 AM
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You have an NP205 transfer case.

Bronco Graveyard sells gasket kits for both T18 and NP205, they also have full rebuild kits if you want to dive deeper.

It was the NP205 gasket kit that had the gasket for between transfer case and transmission, but there are also seals in the tail shaft housing and input of the transfer case and that is going to keep gear oil out of the tailshaft housing. The gasket is just extra insurance there. You could get away using a thin coat of RTV or similar sealant there too.

The build thread I have linked in my signature has more detail about rebuilding both the T18 and NP205 which I did for my truck last summer. Neither rebuild kit for the transmission or transfer case included the seal I needed for the tail-shaft housing though and that had to be ordered seperately. The seal number needed is in my build thread.
 
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Old Apr 2, 2025 | 10:32 AM
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Here's the post related to the seal I needed to order for the tail shaft.
https://www.ford-trucks.com/forums/1...l#post21349249
SKF 15773 is the number on it.
 
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Old Apr 2, 2025 | 10:37 AM
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Thank you so much for the info you guys are really pulling through for me.
 
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