Not Ranked
I have no knowledge of the Holden diff: for all I know it could be a huge improvement over the 8.8, although one drawback seems to be the availability of aftermarket parts, such as R&P sets, posi units, etc.
One thing I did notice, though, when I looked around under one of the newer cars that was up on a lift, was that SPF has replaced the cup-type inner CV joints with a flat CV joint, similar to the ones we used on my upgraded axles. Since most of the SPF axle failures of which I'm aware have involved the splined shaft on the inner CV joint cup, switching to different (hopefully stronger) components here has been a step in the right direction.
Lowell
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