I recently removed the transmission on my 87 GN. How do I tell if it is the original transmission? On the right side it has a adhesive paper tag with: "7BRF", "Three Rivers", "617BRFR00028817" and a barcode. There is also a yellow metal tag on the right side near the tail shaft that has: "BR F" and the serial number 327-871BRF 0247. I could not find a VIN number anywhere on the transmission case. The number on the torque converter is "CBCF" "8653673I".