Thread: 1984 300 i6 back brakes

Ok so apparently my back brakes don't work at all on my 84 but the park brake does and so do the front brakes. Can anyone help me with this?

Crack the rear bleeders and see if you have fluid reaching all the way back. If you do then they probably just need adjusted. If you don't then you need to trace back to find the restriction.

Yes they're drums but we have cracked the bleeders but nothing came out. My dad and his buddy think it's a Proportioning valve but I want to make sure that's what it is and where I'd get one because oriellys auto doesn't have it

Probably correct. Crack the line going into it and out of it... Fluid in, but not out... Problem found.