OK, after crap brake performance going to the Alameda show last weekend, ordered a rebuilt caliper for a 2002 tii, which showed up today and is dang close but not perfect. So off goes my LF caliper to Karp's in LA for rebuilding.
As long as I'm into the LF suspension, planned to tackle the outer u-joint, which has one rotating cup, not a good thing. One thing leads to another, pulling the axle shaft is not a simple matter, so the whole upright comes off. Unbolted the balljoints from the lower A-arm and the upper "A-arm" (in this case known as a transverse leaf spring). It all came apart without taking off any chunks out of me, the F12, or the garage. The good thing about this setup is that in full-droop, the spring is stopped from extending further by a chassis piece, so you don't have to compress it and can just unbolt it all.
That said, it's big heavy pieces. The axle probably weighs 20 lbs, I'd estimate the upright and disk at 40, plus a 15 lb caliper. It's heavy duty, no question. Notice the outer u-joint is a double joint, the pivot center in line with the steering pivot so the axle and steering when turning don't bind and fight each other. On the inner end, the u-joint is on the stub axle sticking out of the trans, which is a little weird. But it all came out OK and now off to Driveline Service of San Leandro. Bet they've never worked on an F12 before.
While in there, I pulled and cleaned the shocks. The felt really airy, and guess what? They were upside down. Makes sense to me that the rubber gaiters would be on the top, but after I cleaned the crud off, "Spica" and "Alto" were visible, so the gaiter goes at the bottom. This might improve the ride a bit, having working shocks. Maybe it won't porpoise quite as much. Now to look at the rears too.
The LF caliper was not fully bolted on, not a good thing. I wonder if it was "ratcheting" under braking and grabbing/binding? The outer pad is really scrubbed looking. Quality Italian work through and through.
Got a set of custom brake hoses made, same fitting and ends as 105 hoses, but 4" longer.