Dear Dave,

thanks for the input. In general I agree with you. But if you have some gearbox problems due to wear you can "play" with the VCV in order to adjust transmission behaviour.

In fact, if I adjust the VCV factory spec, I get way to hard 3 to 4 shifts and flaring at full throttle (due vacuum modulator pressure). If I increase vacuum at VCV, I can get the same hard 3 to 4 shifts at low/medium but nearly good shifts at full throttle.

It is really a mess that will not end until shift kit installation or better, transmission rebuild...