Posted: 28/09/2015 at 14:49
Grapevines usually last for years and years and years.
Can you post a few photos of the vine and the problem areas, and tell us more about your vine's history, where it's growing and your pruning/feeding/watering regime to give us some clues please.
To post a photo on here you need to click on the green tree icon on the toolbar above where your type your post, and follow the instructions. Afraid it doesn't work for iphones - yet