1990 745, driver side wiper spindle was locked tight. All other parts of linkage and the motor worked fine, but needed a thorough cleaning of leaves, seeds and a mouse nest. The thin plastic cap had split and was letting water enter the barrel, maybe got past the O-ring. I removed the linkage from the car, and I've removed the cracked plastic wrapper, the circlip, washer, and O-ring at the top of the pot metal/alloy barrel/bushing. This has allowed me flood into it w WD-40, making rotating the shaft steadily easier. I applied some torch heat, then more WD40, then pushing back and forth on the 2" long metal arm attached to the bottom of the spindle/shaft. Now it rotates smoothly but still much stiffer than the very slick spindle on passenger side. I've tried to tap, (then hammer harder) the spindle out of its barrel. It has moved down 1/16". I want to clean all the crud and dried grease out, then reassemble w clean grease before I reinstall the whole setup so I won't have to do it again. Is there something else locking the shaft inside the barrel?? that I would break if I hammer harder? Maybe use a tie rod remover fork or very small wedge from the bottom? I'm gonna post this as a new thread because I searched FAQ and didn't find an answer.