This is a Chevrolet Corvette Super T-10 4 speed with 3 speeds overdrive transmission. It turns smoothly, and is a good used transmission. It was in 1984-1988 Corvettes, is known as a 4+3 type. Free Shipping in Continental USA!! We are fast shippers, and shipping is free on this one. Questions? 800-850-6898, in and out, 502-493-8523, nights, 502-262-1212, cell.