1. The Boukenger collect ancient artifacts know as Precious. And protect them from various evil factions. The evil factions plot is retained in Overdrive  but the quest is for the Jewels of the Corona Aurora. The Precious plot is adapted with most of the artifcats being clues to the Jewels.

2. The Boukenger work for a govenment orginization.  The Overdrive Rangers work for Andrew Hartford.

3.  The Andrew Hartford and Mack Hartford father/son relationship is not from Boukenger. Also Boukenred is not an andriod like Mack.

4.  In OO Mack doesn't wanted to piolet the Drill Driver because he has a confidence problem. Boukenred  feels guilt over failing his past team. Which is actually partly adapted with Tyzonn.

5. Tyzonn 's counterpart is not an alien in Boukenger. He is a member of a almost extinct tribe.

6. Moltar and Flurious's Sentai counterparts are not brothers like they are in OO.