Required tools:
* Wrench set
* Flat blade screwdriver
* Phillips screwdriver
Instructions:
1. Disconnect the battery
* Open the hood and locate the negative (-) battery terminal.
* Loosen the terminal nut and remove the terminal from the battery.
2. Drain the transmission fluid
* Locate the transmission drain plug, usually located on the transmission pan.
* Place a container under the plug to catch the liquid and loosen the plug.
* Drain all transmission fluid.
3. Disconnect the shift cable
* Disconnect the shift cable from the transmission. To do this, find a bracket or clamp on the cable and remove it.
4. Disconnect electrical connectors
* Disconnect all electrical connectors from the transmission, including the speed sensor, shift position sensor and solenoids.
5. Disconnect the drive shaft
* Locate the drive shafts connected to the gearbox. There will be either two or one.
* Loosen the bolts securing the drive shafts to the gearbox.
* Remove the drive shafts from the gearbox.
6. Disconnect the starter
*Locate the starter attached to the transmission.
* Loosen the bolts holding the starter to the transmission.
* Disconnect the starter from the gearbox.
7. Support the gearbox
*Use a jack or stands to support the transmission.
8. Disconnect the transmission mounts
* Locate the upper and lower transmission mounts that secure it to the engine and body.
* Loosen and remove all mounting bolts.
9. Remove the gearbox
* Carefully pull the transmission back and separate it from the engine.
* Lower the transmission and remove it from under the vehicle.
10. Installation of a new gearbox
* Reinstall the new transmission by following steps 9-1 again.
* Fill the transmission with new transmission fluid.
* Connect the battery and check the operation of the gearbox.
Note: For more detailed instructions, see the repair manual for the specific year and model of your Honda Civic. For safety reasons, it is recommended that this work be left to an experienced mechanic.