I never hear of any problems with them tearing any more then any other machine, I have never had an issue. I would make sure either your stock plastic guards are in place or get some aluminium guards for your cv's. Boot kits run $20-$25 but as long as you catch it before it's full of dirt and debris just clean it up good and grease. Throw on the boot and clamps. Cheaper then an entire cv joint axle.