Hey guys, new here but I knew this was the place to get great advice. 1982 Chevy Impala, 350v8 , th350 tranny, originally took tranny down to change flexplate and torque converter. Did that successfully. Had a leaky trans line so I replaced them with PVC hose and fittings to my intercooler, installed b&m shift improver kit, followed all directions to the "T" , installed new filter & gasket, and a new adjustable vacuum modulator , put everything back together. Happy!! Put in 5 QTS of valvoline max life atf , shifted thru all gears slowly while foot on brake, put it in drive and it took off slowly, shifting fine,made it almost around the block before it stopped moving, hit gas harder and it caught back on and took off, turned to pull back in to my garage and hit the gas and I heard a POP and seen something shoot out the back went to go see what it was and it was the accumulator cover, spring and snap ring. I'm sure it was locked on there how did it pop off? I got a new o ring reinstalled it and now the car won't move at all in any gear