Both my 99s have the original as far as I know. The daily driver just rolled 140,000 today and the recent service showed oil as clean as a whistle and spot-on durametric numbers. Nonetheless, I plan on changing it out before the end of the year just to remove one more possibility from the equation.
WP and AOS have already been replaced.
I had always planned to change the bearing in the weekender as soon as it needed a clutch. Clutch still holding strong.
