Edelbrock Part # 8026 GM Transmission adapter is for use with 2004R, 700R4, 4L60 transmissions. This kit relocates the pin position on an Edelbrock carburetor when hooking up to a throttle valve style transmission (700R4, 2004R, 4L60). The pin location is critical as the TV controls line pressure, shift points, shift firmness, and part throttle downshifts.