@DR OSMAN
The people who defend "sahih" collections not only believe hadiths that contradict the Quran, they believe hadiths that contradict themselves. Some "authentic" hadiths claim the prophet died when he was 6o, others claim when he was 63, and still others say he was 65. See if you can spot the discrepancies:
Bukhari Volume 5, Book 58, Number 190:
Narrated Ibn 'Abbas:
Allah's Apostle was inspired Divinely at the age of forty. Then he stayed in Mecca for thirteen years, and then was ordered to migrate, and he migrated to Medina and stayed there for ten years and then died.
Bukhari Volume 5, Book 58, Number 242:
Narrated Ibn Abbas:
Allah's Apostle started receiving the Divine Inspiration at the age of forty. Then he stayed in Mecca for thirteen years, receiving the Divine Revelation. Then he was ordered to migrate and he lived as an Emigrant for ten years and then died at the age of sixty-three (years).
Bukhari Volume 5, Book 59, Number 741:
Narrated Aisha and Ibn 'Abbas:
The Prophet stayed for ten years in Mecca with the Qur'an being revealed to him and he stayed in Medina for ten years.'
Bukhari Volume 5, Book 59, Number 742:
Narrated 'Aisha:
Allah's Apostle died when he was sixty-three years of age.
Muslim Book 030, Number 5794:
Anas b. Malik reported that Allah's Messenger (may peace be upon him) was neither very conspicuously tall nor short-statured, and his color was neither glaringly white nor brown; his hair was neither very curly nor very straight; Allah commissioned him (as a Prophet) when he had reached the age of forty years, and he stayed in Mecca for ten years and for ten years in Medina; Allah took him away when he had just reached the age of sixty, and there had not been twenty white hair in his head and beard.
Muslim Book 030, Number 5805:
Ammar, the freed slave of Banu Hashim, reported: I asked Ibn 'Abbas how old was he when death overtook the Messenger of Allah (may peace be upon him). He said: I little know that such a thing is not known to a man like you who belong to his people. He said: I asked people about it but they differed with me, and I liked to know your opinion about it. He said: Do you know counting? He said: Yes. He then said: Bear this in mind very well that he was commissioned (as a Prophet) at the age of forty, and he stayed in Mecca for fifteen years; sometime in peace and sometime in dread, and (lived) for ten years after his migration to Medina.
Let's examine the contradictions in Bukhari so far. How old was the Prophet when he died?
Bukhari 4:56:747 and 4:56:748 say he was 40+10+10= 60 years old.
Bukhari 5:58:242 and 5:59:742 say he was 63 years old.
How long did the Prophet stay in Mecca after revelation commenced?
Bukhari 4:56:747 and 4:56:748 say he stayed in Mecca for 10 years.
Bukhari 5:58:190 and 5:59:741 say he stayed in Mecca for 13 years.
Now turn to the contradictions in Sahih Muslim. How old was the Prophet (pbuh) when he died?
Sahih Muslim 030:5794 – He was 60.
Sahih Muslim 030:5805 – He was 40+15+10=65 years old.
There's tonnes more here by this brother:
http://www.mohammedamin.com/Community_issues/How-reliable-are-hadith.html