What issue can arise from a torn CV joint boot as indicated by the dripping grease?

A torn CV joint boot allows grease, which is critical for the lubrication and protection of the CV joint, to escape. As the grease drips out and is exposed to contaminants such as dirt and moisture, it raises the likelihood of accelerated wear and potential failure of the joint itself. Over time, this can lead to immediate mechanical failure, as the joint can no longer function effectively without adequate lubrication.

The remaining options do not directly address the consequences of a torn boot resulting in dripping grease. For example, while improper torque application may contribute to issues with components generally, it is not a direct consequence of a torn CV boot. Excessive heat generation typically happens due to friction, often related to a different kind of failure. Grease contamination can happen due to other factors, but in the specific context of unequal wear and the risk of rapid failure caused by a torn boot, the most immediate and critical concern is the mechanical integrity of the joint itself. Thus, the concern with a torn boot leading to immediate mechanical failure aligns accurately with the scenario presented.