The F2DZ-7548-B Ford throwout bearing, otherwise known as the Ford Rev.-B bearing, includes a steel quill sleeve to protect or rehabilitate the aluminum quill tube which is an integral part of the bell housing. This was installed as original equipment on 1992 and later cars. If you already have a steel sleeve and can't get the old one off easily, reuse it rather than risk snapping off the quill tube and having to get a new bell housing.