New brake booster - pedal remains soft

[Eddo Rogue]

Just throwing this out there. Master cylinders can fail without leaking and loosing fluid. Not saying your master is dead, just saying visible leaks are not the definitive test. They can leak internally where the fluid simply remains in the reservoir instead of being forced down the lines.

+1...they can fail without showing it....not to be that throw parts at it guy, but its easy and relatively cheap to swap and rule out....

 

[Eddo Rogue]

It would be best to pop the drums off and have a look. There should be a hole in the backing plate to adjust the shoes... but again... I would have a look. Chances are the adjuster is frozen and won't turn.

+1, My brakes were much better after replacing everything in the rear, including adjusters and wheel cylinders. Even the parking brake worked better without adjustment.