Tripod joints do not have balls but instead use needle bearing rollers mounted on a three-legged spider. The rollers are mounted at 120 degrees to one another and slide back and forth in tracks in an outer "tulip" housing.
Tripod style joints are used for the inner joints on most domestic and Asian FWD models from 1983 to present. This type of joint is well-suited to the limited operating angles of the inner joint location. The joint is designed to plunge in and out the same as other inboard joints to allow changes in shaft length as the suspension moves.
The tripod inner groove of Feizhou Company is made of cool forging part, which ensure the complete inner structure of the roughcast, so as to ensure a longer life. It is also chemically treated to prevent corrosion and enable easier installation and dismantling.