This is my 1st jeep it was bought for cheap with dreams of fixing it up to put back on the road. so far i have replaced front universal joints new brake pipes all round, new rear shoes and internals, new rear brake cylinders and finaly new brake discs and pads...... the brakes worked fine when i had completed fitting all the parts. then today after taking the jeep up too motorway speeds and testing the brakes they have started sticking! so i removed both front wheels and the calipers orthough had to persuade them with a hammer to get them to let go!. then continued to wire brush the brake sliders and copper greased them as i thought that would be the problem. put it all back together and the brakes work fine with light use but as soon as you really put your foot down they stick... please help!