just found a very nice instruction here
Project ZF 5HP19 transmission: Valve Body - E46Fanatics
DIY: ZF 5HP19 Reverse Drum Fix --Rebuild of ZF 5HP19 Automatic Transmission with failed reverse
DIY: ZF 5HP19 Reverse Drum Fix - E46Fanatics

spare parts catalog http://www.zf.com/media/media/docume...cars/5HP19.pdf

application
BMW — longitudinal engine, rear wheel drive
2001–2003 BMW E46 330Ci M54/B30
2001–2003 BMW E46 330i M54/B30
2000–2003 BMW E46 320i M52tu/B20
2000– BMW E46 323Ci
2000– BMW E46 323i
2000– BMW E46 328i
2000– BMW E38 728i
2001–2003 BMW E46 325Ci M54/B25
2001–2003 BMW E46 325i M54/B25
2001–2003 BMW E39 525i M54/B25
2001–2002 BMW E39 530i M54/B30
2002–2003 BMW Z4 2.5i
2002–2003 BMW Z4 3.0i