it usually comes with the seal.but for some reason the one i bought didnt come with the tool.there is a wear ring on the crankshaft that you need to remove also.i found that a dremel with a small cut off wheel works great.slice the ring with the dremel and tap it with a chisel,itll fall off.DO NOT seperate the ring from the new seal,it MUST be installed as a unit.the new seal will also come with a tube of the gray RTV from hell.they give you enough to do the pan and seal.when you buy the seal it will come with instructions.