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Below are the photos of my recent diff failure at Sears Point. Its hard to see but there is a partial (2nd) crack in the bad bearing cap. I think that the bearing cap failed which then allowed the diff to move back and to the right and then the pinon failed. But thats just a guess.
My guess is (we need Windscreed to chime in here with his engineering eye) that the R/P failed first. Both times we had a rearend let go it was R/P, and neither time did the caps fail because it was low-speed autocross and as soon as we heard some noise we stopped.
If the R/P were to fail and bind on track, all that energy would have to go somewhere and it would bust a cap... um... break.. um... you know what I mean.
I think the vast majority of 'diff' failures have been R/P failures with collateral damage to the caps. One of the best ways to test that theory would be to see if any people who replaced their R/P have had a failure. I bet not.
Seems to me that the weak link is the R/P set, not the caps or the diff like so many think. Windscreen? You out there? Save us from our own ignorance!
If the R/P were to fail and bind on track, all that energy would have to go somewhere and it would bust a cap... um... break.. um... you know what I mean.
My broken booty.....
)
We'll see if I can do that in time. I have found a source for cheap R&P's tho.
