I have a 2001 WJ with 125k, and have noticed that the brakes are squeaking when I completely depress the pedal. Oddly, if doesn't happen unless I have the pedal nearly completely down, then press it harder (all the way to the floor, say when completely stopped). It sounds like a somewhat loud squeak / sliding noise (at first, I thought one of the tires was locking up) under the hood on the drivers side (is that where the MC is located?). I did change out the radiator last weekend (myself), but thought I re filled all of the fluids to where they should be. Any thoughts on what this might be? I am thinking the master cylinder / brake booster maybe going, but am not sure.
On an unrelated note, my Jeep has 125k (I bought it at 85K), and I don't know that the transmission fluid has ever been changed. I'm not having any real problems with it now (other than some hard shifting, esp from reverse to drive, which I am told is just a Jeep thing). Should I replace it (and the filters) myself, or take it to be done professionally? I'm pretty sure I don't want it flushed, but would want to change out what I could if needed.