The DK400 was the last Daimler model to use the company's unique fluid flywheel transmission that had been originally patented way back in 1930 but was replaced in the Majestic by a more modern Borg-Warner fully automatic transmission.
The DK400 was the last new Daimler model to use the company's preselector gearbox with fluid flywheel transmission introduced in 1930. It was replaced in the Majestic by a more modern Borg-Warner fully automatic transmission.