Cv joint grease napa

A CV boot houses a CV joint and protects it by keeping out dirt, debris, and other elements. CV boots are made of rubber or plastic strong enough to withstand the constant bending of the CV joints. The boots also ensure that the CV joints remain lubricated by encapsulating the required amount of lithium moly grease. You have to push the needle hard enough to depress the ball so the grease enters the joint. It is in fact a centering pin with about 12 needle bearings. If they dry out they will heat the pin and score it. Once that happens the bearings fall out and the CV joint no longer spins around a centered axis. That is when it comes apart in spectacular ... The CV joints move with the suspension system to help the wheels maintain a constant velocity through various road forces like bumps and potholes. The CV joint is designed like a ball and socket joint and uses steel balls to move a larger ball enclosed by steel. A CV boot covers the CV joint and helps ensure proper lubrication.