e9999 said:
dang it, aren't there any splines on the thing? If so, you have to pull it all the way out and then set it back a spline or 2 higher. If you just turn it, you'll just flatten the splines...
On my LX470, there are no splines - the arm and the shaft are tapered, kind of like a Morse Taper, and die-cast.
To get the arm off, I open up the plastic shaft cover (careful, easily broken), remove the 10mm nut, and tap the base of the arm near the shaft with a plastic hammer, while lifting the base of the arm away from the body with finger - don't pry, as the sheetmetal dents easily.
After some careful tapping all around, the arm pops off, and can be repositioned onto the glass, the 10mm nut replaced and retightened, and the cover snapped back down.
DO NOT twist the wiper arm to try to put it back on the glass - this will strip the wiper gears, and Lexus will charge to repair.
The rear wiper has been the most problematic part of our 2000 LX470. So far, we've had the gears replaced twice, and the snap cover once, and the damn nut is rusty, too.
My wife takes it through the car wash, and it gets mangled by the spinning whozits, and knocked down by the over-the-car felt blanket.
I've gotten very good at repairing it
HTH
Kirk
