Despite the transmission problem for the moment, the MB still shakes when stepping on breaks. It is quite obvious the old front break discs from the junk yard didn't seem to work right even after re-surfacing, and neither does the front break cylinders since one side of the front tire is constantly clammed. So a couple of weeks ago, I took my MB to my friends repair shop and ask him to order new parts including all break pads, cylinder pumps and discs, and do the replacement for me.
In addition, some worn rubber joints of the suspension system are also replaced the same time.
After the repair, I test drove my MB last Saturday, and confirmed the shaking problem has been finally fixed!
Total cost for parts and labor this time: NT$11,000
Below are the pictures of new break parts replaced: