Description
ATS Full Allison Conversion Kit Stage 3 Transmission Build Replaces 2 Wheel Drive 68RFE 2015 2018 2011 2018 GMC Sierra 1500 All necessary boots and clamps HSK66 12637785 12637788 All necessary boots and clamps are included Direct Bolt On Upgrade The lock up torque converter was added as an afterthought to the already outdated low line pressure transmission making it difficult to control the application of the converter clutch providing unpleasant TCC shifts Unfortunately