TheDude Posted July 14, 2014 Share Posted July 14, 2014 Hello again, I just finished rebuilding my NP231 Transfer case after a seized front u joint installed by a PO almost completely tore it apart.. But anyway, I got that sorted but when it came to replacing the output seals none of the ones I bought fit! Are the seals different between the NP231 and the NP231J? Either way, could someone please give me the part # for the front and rear output seals? I'd really appreciate it! Thanks! Link to comment Share on other sites More sharing options...
mvusse Posted July 16, 2014 Share Posted July 16, 2014 The problem I have had with output shaft seals is that the Spicer catalog show the wrong number for the rear output shaft seal for a 231J. The one it lists is for a 231D for the larger diameter Dodge slip yoke. Can't remember where we found the correct part number anymore, though, nor what the correct parf number is. Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted July 16, 2014 Share Posted July 16, 2014 If you still have the old seals you can cross reference the part numbers that are stamped in the seal to find the correct part numbers . If you give me the numbers I'll cross them for you. Link to comment Share on other sites More sharing options...
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