According to my parts book the part known as the Speedometer Driven Gear and Fitting on my 3 speed transmission is leaking oil. This is the bullet like housing that holds the speedometer gear in the tail housing of a transmission and the cable housing to the dash speedometer is affixed to. It has an O ring on the out-side and a seal on the inside. Seems the inside seal has a drip and I would like to get a new seal for it. Does any one have a source for this seal? Is it sold separately or as an assembly? Thanks... Al