Re: You Are Stupid
I personally would not jump to the conclusion that the use of synthetic oil will solve the problem as this may be a coincidence.
It is possible that the main bearings in the engine you mentioned may have survived using regular oil, plain bearings can take the heaviest load of all bearings with minimal lubrication as the two contacting materials are totally dissimilar and the bearing materials are formulated to take the wear and load. These aren't the white metal bearings of my youth. However it would have taken just a split second for the oil film to break down and the bearing to fail immediately.
Galling does not involve the melting of metal, metal transfers from one or both contacting materials and bonds to the other under extreme pressure any sign of heat was caused by friction, The parts can actually cold weld together and be hard to separate.
Galling - Wikipedia, the free encyclopedia
The roll pin acted like a shear pin at an instant when the gear and shaft were locked together under heavy load and the rough surfaces locked together.
Shock loads are about twice the normal max load. A spinning wheel grabbing would be a shock load.
These are just my thoughts and are probably not worth even two cents. Jumping to conclusions is sometimes just too easy, perhaps this is just the first weak link in the chain no matter what kind of oil is used.
http://auto.howstuffworks.com/differential2.htm
Last edited by onehundred80; Jul 29, 2010 at 09:05 PM.