Leaking air through vacuum lines, easy fix, you just have to find the leak, they are located near the fire wall, about 2 or 3 inches long 45 degree angle. With time they become bristle and air escapes.

I'm having some tranny problems with my s80 2002 145k, reverse does not engage on uphill I have to turn off the car and try again and it will engage. On level surface no problem. Tranny is acting up with some rough shifting when driving off from a stop. I did some research on tranny oils and found t...