Hey guys! I came here because I have some questions I can’t find any good answers to. I have a 2005 GMC Sierra 4dr 2wd that had drum brakes on the rear. I swapped out the rear end with one from a 2006 that had disc brakes.
Problem: If I pump the brake up it won’t hold pressure on the rear. Has anybody done this swap or know what is needed? Proportioning valve? Master cylinder? Brake booster? ?? I’m stuck and don’t want to start spending hundreds if it’s something simple.