Hi, I have a 79 Ford f150. I have a problem with the rear end but don't know much about them. I was having a kind of banging noise so I replaced the u joints and while I was under there noticed the nut that holds the u joint holder was loose so I tightened it and put the u joints in. I still have that banging if I let off the gas and get right back on it. Any help would be appreciated. I believe I have the 9" rear end. My chilton book shows the only match to mine is the 9" but, not sure. Again, any help would be helpful.