Description Genuine Spicer TTC Gear Mainshaft P/N: 99-8-1 or 9981. We have transmission parts for sale, ready to ship worldwide. Used in these Spicer Transmission models1241-C1241-DAMO1750-4APO1000-4CAPO1000-4DAUX-1241-1000 TransmissionP1241-CP1241-D