Hi,
For what it's worth, I got my Td4 Steptronic MY01 on january 6th in 2001, in october (after about 10.000 km) I had it rechipped by a local tuner (he took the chip off the ECUboard, modified the parameters and soldered back on the board) and imo it's one of the best things I ever did, the engine which was very good before but after the chipping it got much more "schwung" (got now about 140 bhp and 310 Nm of torque) and I have the impression that the JATCO autobox likes the extra power and torque as well, it selects more fluently now, also the engine seems to like much more the extra's as it has apparently not to "work" anymore. Done now about 40.000 kms with it and still enjoy it every day (as well as the Hippo as such as well of course). Take care.