A CV boot is the flexible protective cover around a constant-velocity joint. It holds grease inside and helps keep water and dirt out. A split boot or loose clamp can compromise that protection.
If the problem is found before the joint is damaged, a boot repair may be possible for some applications. A contaminated, worn, or noisy joint may require more extensive work.
Have Certified Transmission in Council Bluffs inspect the condition rather than assuming a new boot will correct existing joint damage. Early attention can help clarify the available repair options.