TC reported train jerky and TIMs show front DT car BC pressure - 0.1 bars while rear M1 car - 0.08 b ars.Brakes unable to release fully. ~~~~~ Check #3626 & #1625 when on Coast ok. Dump v/v tested ok. Brake test on #1625 brake release at 1.5-2 sec slow. Replaced ACU and tested ok. Not: 2164882 raised to RSW. Done by Deepan/Fauzi/Omar. 29/05/20. Refer to W/O: 10750994. Done on 31/05/20.