be a little more thorough when you need something or are wanting to buy something, you said any B series transmission, well man, a B17 isnt Hydro some B16's arent either, and which b18 wher eyou talkin about becuase B18A1's aren't Hydro at all, B18B's, GSR (B18C1) TYPE R (B18C5) these are Hydro's oh an d SIR2's B16A2 and A3 are Hydro.