Just before the lose of drive in forward or reverse,I heard a noise similar to a loud click or klunk ,sounded similar to a side link hitting the casing.....Then the lose of drive on left side,Then the machine started to reverse on it's own. Well I'm stumped lol.I have no imfo how to adjust or remove to repair.Is there anyone out there with any imfo on how to repair or the break down imfo the left side .For I'm assuming that each side is driven or powered by hyd pump.I have not taken the left side a part yet.But I'm not afraid give it a try.lol... I belive but I'm only assuming is each side driven with a roller chain,???????..... Also the machine is powered by a V-4 wishconsin gas,the same motor a hesston swather used.About 65 h.p.,not exactly sure on the spelling or the h.p... Would apprechiate any help being offered ,thanks Gordon.