i have a 06 blaster n it leaking oil from the shifter seal.i hav hear that u can remove the seal witout spittin the motor apart jus usein a screw.and screw it to the seal n pull it out but when i looked at the seal there a thin seal n in the middle there a round metal??? so there the motor case,seal,some round metel?, and then there the shifter so how do i take the seal out???