Dimension for correct NP205 output seal

[Littlebeefy]

My NP205 is leaking and I'm going to pull it and replace the gaskets and seal at the output where I see the leak. I'm having trouble finding the right seal to fit my mix of parts. I have a Ford NP205 (stock) with a 1350 flange that has a 2.125" OD (aftermarket). What is the correct dimensions for the seal? Should the OD be 3" or 3.06" and what is the correct width?

2.125" yoke OD was on some 79s F trucks with the 2 speed NP205, but depending on whether I look at Rock Auto or JBG, I get different Timken part numbers for a 205. I know the NP205 doesn't apply to the Bullnose, but hoping someone here knows the answer.

[Gary Lewis]

Chad - I don't know the answer to the question, but I'm hoping this will help you figure it out. I've extracted the pages from the 1973-79 MPC that I think are applicable to the NP 205. And in the parts list you want column J. And hopefully the illustrations I've included are for a 205, but the MPC doesn't really say.

[Littlebeefy]

Thanks, Gary. As the Executive often says to the Engineer, "The answer you gave me is thorough and technically accurate, but it does not help me solve my problem at all." I need this documentation for my transfer case, though, so I really appreciate that.

From what I can tell the correct OD for the rear output seal on the NP205 is 3.06" and the depth should be .47". I'm going with SKF 21215 for the seal.

[Gary Lewis]

Sorry, but that's the best info I have.  Please let us know what you find out.