Originally Posted By: zfasts03
A few years back I had to change the U-Joints on the front axle shafts of my 1997 Dodge Ram 1500 4x4. (Dana 44 axle)
I used:
- Moog Super Strength U-Joints (with zerks)
- Pumped U-Joints full though the zerks with Amsoil Dominator Synthetic Racing Grease (no moly), prior to reinstalling the shafts in the axle
About 3000 miles later the joints failed, binding and getting real hot.
2nd time around I used Spicer U-joints (no zerks) and all is good for years now.
Upon disassembly of the failed Moog joints the roller bearings/grease had fused themselves as one. There was no longer any roller action of the bearings and major friction and heat was happening.
So since then I am hesitant in using Amsoil Racing grease.
Did I do something wrong with installation? Or are the Moog joints not good for this application? The Moog joints seemed to install fine and movement was good without binding when reinstalled.
The Racing grease would not necessarily be my first choice for this application but if installed properly in a surgically clean u-joint would not have failed in this manner. By some accounts, actually this could be an ideal application for this grease.
But a few years back? How old was the grease? How was it stored?
Hard to say on the mixing greases. I never do it, even with supposedly compatible grease types.
Some level of question about the installation, but let's count that as one controlled variable that was good. And lastly we have components with known infant mortality and failure modes that fit your description to a T. Therefore I'm really hard pressed to blame the grease.