The part of 117 from its intersection with I40 into Grants probably is a section of the old highway, though the part south of the intersection with I40 is not.
Route 66 was realigned along around 1937. Prior to that date, the highway ran north from near Santa Rosa (on current I40) up to Santa Fe. From there, old 66 ran parallel to the river through Albuquerque down to Los Lunas. And from Los Lunas, the highway turned west/northwest along what is current called Hwy 6, where it connects with current I40/Rt. 66. (Within Albuquerque, pre-realignment Route 66 is, I believe, current-day Fourth Street.)
Of course, after 1937, the highway ran directly from Santa Rosa west into Albuquerque and further west. This is more or less I40. Within current-day Albuquerque, Central Avenue is old, post-realignment Route 66.
:)
Lynn