Yes, although it probably won't make much of a noticeable difference.
I bought mine off the rubik's cube website
The 4x4 rubik's cube or the Rubik's Revenge
i dont think you can
There aren't any zerks on that truck.
Thecubicle.us and several other websites (including Amazon) offer 4x4 Rubik's cubes.
there are actually six, the original 3x3 cube, the 30th anniversary wood cube, the ice cube(clear 2x2 cube), the plain 2x2 cube, the 4x4 cube, and last but not least the 5x5 cube.
you can get it on flipkart , rubiks.com or on ebay
The best choice is Rubik's. Don't get a knock-off. You can buy a reliable 4x4 Rubik's Cube online at the website in the sources and related links(below).
80/90 gear lube
The front axle uses 80W90.
Why are you even thinking to ask that question?
Fill the differential until your hooked finger in the filler hole gets wet, no more lube; extra lube is not a good idea. Re-install the plug. clean up any spilled lube and go wash your hands.