Here is the issue, my 1980 datsun 720 4x4 was my dad's. He bought it brand new in 79 and gave it to me in february. It needs a good paint job which i am thinking about rattle can because it will cost about 3000 dollars to have it done professionally. He kept up with oil, spark plugs and radiator fluids. It is a 5 speed and he said he doesnt think it takes transmission fluid. I pretty sure it does and can someone tell me if that is correct. The front brakes he had replaced years ago. It has sat in our garage for about 15 or so years. It has 94,000 miles on it. My issues is the rear brakes. Can't find a leak and master rear does not stay full. Any answers on what the hell is going on