The first two shots are pages from the April 1985 edition of the Indian Defence Science Journal, in which M Natarajan, widely considered to be the father of the Arjun tank project, and who retired last year as Chief of DRDO, writes about the Arjun's transmission which was then being attempted indigenously. The last grab shows you the transmission that the Arjun finally had to use. Oh well. Discussions are on at the moment over additional Arjuns for the Army. Stay tuned for updates.