Wheeljack is the Japanese name of the Autobot Downshift, who greatly resembles the Generation One Wheeljack.
Energon's Downshift is carried over to Transformers: Cybertron, as an early 1970s era muscle car based on either a 1970-74 Plymouth Barracuda, or 1970-71 Dodge Challenger who again turns into an homage of Wheeljack.