TC5R Shock problem
Maybe someone here can give me some advice. I have a TC5R. I was having a problem with one of the shocks, I don't know what the part is called, but it is the larger black piece that holds the black plastic washer and the "o" ring in. It would not lock into the bottom of the shock body, so when I ran it, it would get loose and allow the "o" ring to come loose and allow all the oil to leak out. I had an upgrade kit for the F/T TC4 shocks, part # 31123. The larger black piece has a different shape, but I tried it and it seems to be a tight enough fit to secure the "o" ring. My question is, are they interchangeable? Is the shock body the same? If they are should I change all 4. Or, should I get a rebuild kit with the current large black piece # 31120?