I got a 12 inch converter I am trying to sell that I cannot identify. Bought the GN with it already on. It foot brakes at 2500rpm and flashes 2800rpm. It only drops 700rpm between shifts on the logs. There is a number on the back on the tq of 102907. Around the front edge, k1 c c17 and k1 2b 250. Has a 2 stamped on the side and a 8 on the opposite side. Does anyone have any ideas? Trying to sell for 100.00 and has an estimate of 2500-3000 miles on it.