2002 Swapping a Kia diesel engine onto the original 2002 Envoy automatic transmission is a successful operation, and the car's transmission remains the original without changes. We connected the Envoy transmission to the Kia diesel engine with 35 horsepower using a flange made on a lathe that connects the torque converter to the Kia engine, and a fabricated iron plate that connects the Envoy transmission to the Kia engine's cylinder.