This t.ransgo SHIFT KIT Valve Body Repair Kit fits 2015-2019 vehicle: . .s equipped with the GEN2 6R80 and 2017-on 6R100. If you are working on a GEN1 2006-2014, use t.ransgo part # SK 6R80-A.Common concerns with this transmission are TCC shudder, rough coast down shifts, gear ratio error and solenoid performance codes. Firstly, these complaints are the result of the wear in the pressure regulator (PR) valve bore and the pressure regulator valve balance bushing. Secondly, the torque converter clutch regulator valve design and calibration were in dire need of an upgrade to address the TCC shudder complaint.Features and benefits:The kit includes a hardened steel drop-in two-piece pressure regulator valve and a redesigned TCC regulator valves for a quick no-hassle install. Our drop in valves require no reaming or tooling.Both the redesigned drop-in steel two-piece PR valve and TCC regulator valve feature longer lands which restores the hydraulic integrity of the circuit by utilizing previously unused and therefore unworn areas of their bore. Furthermore, the longer lands increase bore longevity by redistributing the load over a greater surface area. The kit also includes new rubber damper inserts that flatten out over time and new wire retainer clips to replace the occasional broken one.Corrects/Prevents/Reduces:28-46 MPH TCC shudder due to TCC regulator malfunctionErratic pressure due to PR malfunctionSoft or long shiftsCoast downshift clunkGear ratio codes: P0731, P0732, P0733, P0734, P0729Shift error codes: P0781, P0782, P0783, P0784, P0829Includes:Patent-pending drop-in USA-made hardened steel two-piece PR valveUSA-made aluminum PR valve boost bushingDrop-in USA-made hardened steel TCC regulator valve(2) Calibration springs(4) New valve body bore plug wire retainers(6) New