The CV joint is the part inside the boot.
The boot is the rubber cover The boot is the accorion-folded rubber shroud that fits over the ball joint,
The shaft should have a clip on it and you just have to give it a quick yank to pull it out of the CV joint then you can slip the boot on.
Cut the metal ring type clamp off the rubber boot, then slide the axle from the slip joint...use standard hose clamp to reassemble
Check the drive axle for a broken and leaking boot or bad CV joint.
If the noise is a clicking or poping it most likely is the drive axle. The knuckle joint behind the tire. The rubber boot covering the joint has probably split allowing dirt to get to the joint and causing it to wear. $60-80 for an axle if you do it yourself. $200 or more at a shop.
it shouldn't be. replace the joint or the axle.
This rubber jacket you speak of is actually covering the CV joint. If the rubber is torn or cracked, then you more than likely need to have the CV joint replaced, as it will fail due to exposure to water and road debris. The rubber boot is what protects the joint.
Assuming this is a front wheel drive axle (aka halfshaft), the CV joint and boot are what fails. You will hear a crunching/snapping noise when accelerating especially on a curve and you may also see grease spinning out from a torn boot.
The usual symptoms are a knocking or loud clicking noise from the front of the car when cornering. The noise is not normally noticeable when driving straight. Check the CV boot (the rubber cover round the drive shaft nearest to the front wheel) this will very often be the cause of the failure if it is split.
remove axle, separate joint inner or outter joint, clean, regrease, and put it back together with a new boot
Consider replacing the axle with a rebuilt unit. When the boot is torn, contaminants enter the joint and quickly destroy it. It is very labor intensive to replace the boot vs an axle which is a do-it-yourself job. In my shop we used to replace boots but because of high incident of joint failure customers were understandably upset. The boot has a life and so does the joint; once the boot tears ,the joint is not far behind. Why do the job twice?
The rubber boot that covers the CV joint is what tears. When the boot tears grease is expelled and water and dirt gets in.