2007 CHEVROLET IMPALA - Transmission, Transaxle Automatic Transmission, 3.9L, Police Car Opt 9C1 & 9C3, 60 Months Warranty. Free Shipping, 1 Month Return Policy. Used (Original Equipment Manufacturer). Transmission Tested and Run, covered by warranty. All Transmissions are Shipped as Complete Assemblies including: Transmission; Torque Converter (Automatic Transmissions Only); Oil Pan.