Diff locked when ignition is off. › Forums › Repairs & Technical › Repairs & Technical for Golf & Passat cars › Diff locked when ignition is off. This topic has 1 reply, 2 voices, and was last updated 7 years, 4 months ago by Chris S. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts September 13, 2018 at 8:15 pm #21997 AndyFParticipant Hi guys, what would cause the diff to lock when the car is turned off and in Neutral? I.e. can’t push the car when the engine is off! When engine is running and in neutral you can ‘free wheel’. is it the vacum configuration? September 16, 2018 at 5:58 pm #22133 Chris SModerator Well thats a new one! Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In