Changes

* The Carousel of Progress being renamed Walt Disney's Carousel of Progress.

* The addition of the Timekeeper narration in 1994. This narration was subsequently removed when the Timekeeper closed in 2006.

* A change in the narration so that the ride vehicle was referred to as the TTA Metroliner.

* A change in the narration when Delta Dreamflight became Take Flight! in 1996.

* The addition of Buzz Lightyear's Space Ranger Spin. With this addition, the window that once looked into Delta Dreamflight was covered with a diorama of an intergalactic hair salon.

* The addition of a diorama depicting the fiction Tomorrowland Transit Authority Red and Green lines. This diorama is located across from Progress City.

* A change in the narration so that Federal Express was removed as the sponsor of Space Mountain in 2004.

In 2009 in conjunction with the Space Mountain refurbishment, the Tomorrowland Transit Authority was once again closed for refurbishment. Disney said that it was necessary to close the attraction, so that maintenance workers could work on Space Mountain. At this time, the attraction also received a new narration <ref> http://attractionsmagazine.com/video-ride-the-updated-tomorrowland-transit-authority-tta-at-the-magic-kingdom/ </ref>. The narration eliminated the New Tomorrowland backstory, and many of the in-jokes and references that came with it. New attractions such as [[Stitch's Great Escape!]] and the [[Monsters, Inc. Laugh Floor]] were added to the narration, which was now done by Mike Brassell, who narrates the attraction in a much quieter and emotionless way. During the time that Mike Brassell has narrated the attraction; the only major change has been the re-addition of the famous Tom Morrow line, now located in [[Space Mountain]]. In the new narration the ride vehicle is referred to as Tomorrowland Transit Authority PeopleMover instead of a TTA Metroliner <ref> https://www.youtube.com/watch?v=j6EnR8fxcs4 </ref>.