Little help with kickdown on Super Six conv

Update: Installed the spring, and used a nut in the slot. Drove it and had super high shifts. So I then moved the nut farther up in the slot, thinking thats what it needs, and the shifts when even higher.
So removed the nut, now shift is happening (at light throttle) 1-2 around 12mph, 2 - 3 around 22mph. No clunk. And I have kickdown in both gears.

Great. What sort of lube can I use in the pivots on the kickdown rod assembly?