HELP 91 Jeep Cherokee Laredo 5 speed. Driving uphill with load went to downshift into 4th pedal wouldn't depress. Turned off engine, put in gear lugged a little but got me home. Had to turn off engine to change gears. Reservoir almost empty. New clutch 2 years ago, new slave & master 1 year ago. I don't even know how to bleed it by myself. (It's a girl thing.)