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**Bob B.** · 02-19-2015, 02:48 PM

Had one of those apart years ago. I seem to remember the axle shaft grease seal, which is inboard of the U-joint, is the problem. The knuckle has a felt wiper under the ring that encloses the knuckle to the 'ball' on the end of the axle housing. That felt ring is not designed to hold back oil, it is there to keep dirt/water out of the enclosed U-joint. If you get it all apart, there is a chance the seal is an off-the-shelf part (hopefully it has a number on it). Of course, you run the risk of getting it apart and not having parts to put it back together.

Try asking these guys:

http://www.napco4x4.org/

02-19-2015, 02:48 PM	#5
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,396	Re: 1970 C/60 Parts help!! Had one of those apart years ago. I seem to remember the axle shaft grease seal, which is inboard of the U-joint, is the problem. The knuckle has a felt wiper under the ring that encloses the knuckle to the 'ball' on the end of the axle housing. That felt ring is not designed to hold back oil, it is there to keep dirt/water out of the enclosed U-joint. If you get it all apart, there is a chance the seal is an off-the-shelf part (hopefully it has a number on it). Of course, you run the risk of getting it apart and not having parts to put it back together. Try asking these guys: http://www.napco4x4.org/ __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. Last edited by Bob B.; 02-19-2015 at 02:55 PM.