Update kit to replace the down angle PCM 40A model 1.23:1 ratio transmission with the 80A model in PCM GM engine applications. PCM 80A 1.23:1 Ratio GM Transmission Kit | Pleasurecraft RF157017-27A Conversion kit for updating the PCM 40A transmission to the PCM 80A model on GM engines Kit includes 80A transmission RA157027 The transmission is 1.23:1 reduction ratio with an 8 degree down angle 4 inch diameter output coupling Kit also includes a new damper drive plate, transmission cooler and hoses along with all necessary attaching hardware No dimensional changes take place with the update The original propshaft, coupler and transmission mounts can be reused Replaces RA157027 transmission model 40A NON-RETURNABLE ITEM