Transmission Fluid Change on 2012-2015 Honda Civic
Ensure smooth shifting by draining and refilling automatic ATF or manual MTF gearbox fluid. Mapped specifically for 2014 Honda Civic Si (2.4L I4 (K24Z7)).
Drain Gearbox Fluid
Raise the car on jack stands. Locate the 3/8 inch square drive drain plug on the gearbox casing. Use a 3/8 drive breaker bar to loosen the belt and let the fluid drain out.
Refill Casing Fluid
Clean off the magnetic drain plug, fit a new crush washer, and reinstall. Access the fill port (or automatic dipstick tube) and refill with exact spec fluid (ATF DW-1 for auto or Honda MTF for manual).