Examples? Plenty, just open your ears and have a more sensitive
butt.
It is bcos of the ageing ZF MKIV dms that I prefer the Voith ones.
In quite a significant number of ZF DDs, the gearbox is pretty much
spoilt. I doubt very much if the missing lock-up clutch and the
subsequent draggy gears are modifications, one evidence is that,
with the exception of 9423E, the buses get "cured". Just a matter
of when they fix it I guess. Not even the LO3Xes are spared, I had
taken 9172D some time ago and was disappointed to find it behaving
exactly what I had expected on the mutated VO3Xes.