I am taking my 4l80e apart to build a th400. It has an extreme automatics transbrake billet valve body. This valvebody worked very well and transbrake is extremely fast. Would not build another 4l80e without it as it solved alot of problems. Fixed line pressure, full manual, reverse pattern. Was set up to be able to use torque converter clutch. I will also have a billet input shaft and an intermediate shaft for sale. I bought them from jakes performance. Not sure if they are 300m or vasco?