Steps to replace the transmission in a car
1. Preparation
* Gather the necessary tools and spare parts.
* Disconnect the battery.
* Raise the car and place it on stands.
2. Draining transmission fluid
* Locate the transmission fluid drain plug on the oil pan and remove it.
*Collect the liquid in a suitable container.
3. Removing the old gearbox
* Disconnect all electrical connectors, sensors and actuators connected to the transmission.
* Remove the bolts securing the transmission lines and drive shafts.
* Disconnect the gear shift rod and speedometer drive.
* Lower the subframe supporting the transmission.
* Remove the bolts or latches securing the transmission to the engine.
* Carefully slide the transmission rearward to disengage it from the engine.
4. Installation of a new gearbox
* Place the new gearbox in place and carefully slide it onto the clutch shaft.
* Install the bolts or latches securing the transmission to the engine and tighten them.
* Lift the subframe and attach it to the car body.
* Connect the shift rod and speedometer drive.
* Screw in the transmission lines and drive shafts.
5. Connecting electrical equipment
* Connect all electrical connectors, sensors and actuators to the transmission.
6. Filling with transmission fluid
* Locate the transmission fluid fill plug on the transmission.
* Fill with the recommended type and volume of transmission fluid.
7. Startup and testing
* Connect the battery.
* Start the engine.
* Check transmission fluid levels.
* Shift gears to check proper operation.
Adviсe
* Use quality parts and transmission fluid.
* If possible, raise the vehicle on a lift rather than on jack stands.
*Follow manufacturer’s instructions and safety precautions.
*If you are unsure of your abilities, consult a qualified mechanic.
Additional costs
* Spare parts (new gearbox, transmission fluid)
* Tools (if you need to buy or rent them)
* Mechanic job (if you hire someone)