View Full Version : how to lubricate u-joints with gear oil

June 4th, 2013, 10:25 PM
My manual calls for lubricating the u joints with gear oil. There are zerk fittings at these points. How does one pump gear oil through a zerc fitting?

June 7th, 2013, 07:37 PM
This is the first time I have ever heard of using gear oil in an open U-joint. AFAIK, the only U-joints which get lubricated with gear oil are in torque tube drives.

Just go ahead and use gun grease or wheel bearing grease, and you won't have any problems.