The underlying assumption behind the whole process is that artificial parts are capable of replicating whatever the brain and body do to produce a human conscio

The underlying assumption behind the whole process is that artificial parts are capable of replicating whatever the brain and body do to produce a human consciousness in all its details, that is including all spectrum of emotions. Therefore yes, the cyborg part should be able to feel everything the fleshy part would, and the transition should be seemless.