[longassname]

Subaru really just played around with the high clutch hub trying to improve the cooling of the high clutch. There were several different versions and I see them all with no discernable difference in failure rate. If your poll is showing less transmission failures in later model SVXs I would strongly suspect that is soley do to there being less later model SVXs.

The really early SVX transmissions had a different high clutch drum and smaller reverse frictions. In those transmissions I do see a higher incidence of reverse clutch failure on top of a failed high clutch. This is clearly caused by the failed high clutch though so I wouldn't even worry about having one of those transmissions.