Can anyone point to a TSB for the transmission software for the later (2004) XK X100 ?
I can't seem to fine it, although I find many references to it when the subject is the "toot" on the 2-3 or 3-4 shift on the 6 spd cars.

 

This one?
I believe the additive is no longer available so this post might be helpful. https://www.jaguarforums.com/forum/x...s-none-284074/

 

The TSB I heard about had to do with a dealer installed software update.

 

Try this then, it covers the adaption procedure.

 

Thats the one! Thanks.
Now to find out if there is a facility that can provide that service, given that "the (original) additive" is no longer available.

 

The two closest dealerships to me no longer perform the ZF 6HP26 adaptation procedure. They claim that they no longer have the required hardware or software....

A couple of our local indie shops claim they can successfully perform it. If you find one who tells you the same, ask for references of folks whose cars they have previously "adapted" and speak with them for confirmation....