I just read your post hope not too late to reply
ZF workshop u need really careful,the service and the
PR is very good,don't fall into the trap.
The minor service everywhere can do it but when come
problems(major service),don't panic direct go to
KA Auto-no service.but he can solve whatever problem
with minimum cost.
Keep the RESIT for all your parts replace by the ZF than compare to
to KA Auto than you will know the different.
Remark:don't trust it's Diagnostic Machine-is totally out spec
and can't scan at all.