So i'm troubleshooting a leak and will be replacing the o-rings on the speed gear and housing although at this point they are probably fine. But I've discovered the grommet on my cable is toast where it mates to the part at the trans.  Anyone know how to go about replacing this?  I can't seem to find it for sale anywhere. I'd prefer not to buy a new cable assembly if I can help it. I believe the parts diagram is here: http://www.carpartsmanual.com/datsun/Z-1969-1978/electrical/meters  and p