Transmission update kit to replace PCM 40I model 1:1 ratio with 80I model on GM engines and includes all necessary part for the conversion. Transmission Kit GM 80I 1:1 Ratio | PCM RF157016-26A Conversion kit for updating the PCM 40I transmission to the PCM 80I model for GM engines Kit includes 80I transmission RA157026 The transmission is 1:1 ratio direct drive and has a 4 inch diameter 4 bolt output coupler Kit also includes a new damper drive plate, transmission cooler and hoses along with all necessary attaching hardware Transmission is also used with the direct couple Walter V-Drive model RV-26D No dimensional changes take place with the update The original propshaft, coupler and transmission mounts can be reused Replaces RA157016 transmission model 40I