My argo trans is stuck in hi gear and I need to take the transmission apart. I got it like this and it was probably sitting outside for a few years cause there was some water in the gear oil. I can't get the driven clutch off it is rusted on so does anyone have some ideas to get the clutch off or what could be wrong with the shifter. The argo is an HT 4898 with a Tecumseh 16hp and a 6268J transmission. Thanks.