My guess is that you didn't flush all of the old fluid out and there is still some moisture (water) in the system. When you did that hard stop you boiled it and when it boiled it created pressure in the system that dragged the brakes. Now it is "squeshy" because of the moisture and air in the system. Try flushing again. Remove at least a pint from each caliper. Look at it and if it is not clear or there are particles of dirt or air bubbles, keep flushing. Use the proper bleeding procedure so you don't draw any air back into the system as you flush and bleed. While flushing do a more though inspection of each caliper. If you see any wetness then the piston seal is leaking and that means the piston and caliper are corroded inside. The only cure is to replace or rebuild. If any one caliper is corroded then you should do ALL of them. You should also do the clutch system if you have a 5-speed. The owner's manual says that the fluid is supposed to be flushed out every 2 years. DOT 4 is a spec and for any brake fluid to meet that spec it has to resist boiling to that temperature (I don't know off-hand what the spec is). Chances are if this was the first time in 20 years the system was flushed and you already had to do the master cylinder you will need to do all 4 calipers. Don't skimp on the brakes, this is one system, like steering, that you must be able to trust. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "therealdmcvegas" <DMCVegas@xxxx> wrote: > Last August, I replaced my Brake Master Cylinder, and also flushed the entire > hydraulic system with Castrol GTLMA (as stated in a previous post). And everything > has been fine since then. > > Until last week... >