Not sure if this should be in product reviews or this section of the board as a few people have spongy pedals after bleeding the brakes. I took out my diff and left the air lines open for about three years...not good. There was no other way to bleed all the fluid out of my system except with a pressure bleeder. Check out all the bubbles coming out of my right rear brake line (yes, that's me in the video and disclosure-I got the tool for doing the video, but it did work.) I had to bleed all four corners, check the flare I made for the brake line and then re-bleed this one particular corner. The front brakes had dirt/sediment coming out of the bleeder screw through the clear tube. If you can't figure out why your brakes still feel spongy after bleeding them, try this: