Reply to "Adjustable release bearing"

4n, I should have mentioned also:
Quella's assembly is built similarly to mine which instead uses Tilton racing parts. Quella's unit adjusts for height via a tricky threaded adapter that slides over the stock ZF nose piece with a thin, large-diameter jam nut. RED LOCK-TITE THIS NUT ONCE ADJUSTMENT IS FINALIZED! These jam nuts have come loose so the adjustment shifts.
My Tilton assembly instead uses a custom threaded ZF nose-piece so the height adjustment is by rotating the whole concentric assembly up or down, which is then locked with an allen screw thru a protruding boss on the Tilton assembly. My assembly has been in our car for 14 years trouble free but I still carry a complete spare on long trips... parts are available but you won't find them at a rest-stop gas station!