NP 205 transfer case leak

[Jcfcamaro]

Thought I'd post this to help anyone with a np205 transfer case leak at the speedo drive. Reading different post the factory used a oring on the pinion shaft but is pretty prone to wearing out and leaking so GM started selling new adapter nuts with a larger I.D from .506 to .579 to have a press in seal to help hold back the oil, but now are discontinued by GM # 326561. Other places are making the same adapter nut with the new style seal but the I.D of the seal was larger than my .250 shaft size. Ended up going to napa auto parts and looking through there seal book and found a seal that would fit my .250 shaft and also the .506 O.D part number 2450 SKF brand. The seal fits perfectly on the shaft I.D but just barely catches the inside of the nut where it presses into( nut Is .506 and the O.D of seal is .505) but with some bearing epoxy or a punch with some light Mark's made inside the nut it will hold fine. Just thought I'd make this post to help anyone with the same issue. P.S the new style nut is around 50.00 vs this seal I bought was 5.99.