In response to Angru's question our 306 with AL4 box has now done over 10000 trouble free smooth shifting klms in all driving conditions without any issues whatsoever since I put 8 liters of fresh Amsoil ATF and the Dr Tranny friction modifier through / into it.... Amsoil ATF meets the ZF specs for ATF and I buy it from a distributor in Wollongong....can't comment about anything else as I have no direct reference or experience....all I know is that our auto went from a jerky harsh shifting and occasionally slipping gearbox to a relatively smooth, seem less an quite enjoyable drive.....