see top left pic for the type i'm refering to) can become loose through not having the shaft in place
Hi Ian - that is exactly the bearing design the 'Sud/Sprint uses - double roller, with a split inner race. However, unlike the cars you are describing, where the driveshaft is used to retain the inboard inner race, if you see what I mean, in the 'Sud the driven hub runs through the centre of the bearing and the hub nut is tightened against the inboard inner race, establishing the 200+ lb/ft preload.
A picture speaks a thousand (badly chosen words), here is a copy of the microfiche from my freinds at Alfa Romeo boxerfreunde.ch | Herzlich willkommen auf boxerfreunde.ch!
so you can see what I'm on about.
The hub and bearings are completely self-contained, and don't rely on the driveshaft to locate them, but although the driven hub contains the bearing grease on the outside, the inner grease seal is open to the elements without the driveshaft in place. This, I believe, is the only issue preventing use of the hubs in a RWD installation.
This concludes the submission for the defence, m'lud
PS - forgot to mention, the 'Sud bearings aren't sealed - they are packed with bearing grease during assembly which is retained by the inner and outer grease seals.
PPS - well done for winning the autotest at NAD - I bet that put a few noses out of joint