Other Changes
Other consonant changes on the way from West Germanic to Old High German are included under the heading "High German consonant shift" by some scholars that see the term as a description of the whole context, but are excluded by others that use it to describe the neatness of the threefold chain shift. Although it might be possible to see /ð/ →/d/, /ɣ/ →/ɡ/ and /v/ →/b/ as a similar group of three, both the chronology and the differing phonetic conditions under which these changes occur speak against such a grouping.
Read more about this topic: High German Consonant Shift