Looking for information on 995 Oliver GM Diesels. On the one I&#039;ve found, the original owner says that when the torque converter went out years ago, they just replaced it with a shaft. It is a very early 1958 according to the serial number. Also, the tractor only has a 3 speed transmission.I thought it should have a 6 speed. Would like to find a torque converter for it. Apparently the converter was used in some industrial applications. A make and model number for the converter would be helpful. Any help would be appreciated.