Quote:

Is there considerable strength difference between 3 and 4 gear planets?



The weak point in the aluminum planetaries is the spline in the front planetary but there is more spline contact in the 3-pinion than the 4-pinion so the strength is a tossup between the two stockers.

It's rare to see the gear itself fail but it does happen.

8238070-brokenpinion.jpg (129 downloads)