So, you're thinking about tackling a 2012 Scion tC transmission removal? This is no small feat, but with the right tools, a solid plan, and a bit of elbow grease, you can definitely get the job done. This guide will walk you through each step, providing you with the knowledge to confidently remove that transmission. Remember, safety first! Always use jack stands when working under a vehicle, and if you're not comfortable with any of these steps, it's best to consult a professional mechanic. Let's dive in, guys!

Preparing for the Transmission Removal

Before we get our hands dirty, preparation is key. It is vital to gather all of the necessary tools and equipment to ensure a smooth and efficient removal process. Nothing is more frustrating than getting halfway through the job and realizing you're missing a crucial tool. Secondly, we need to ensure the car is safely prepped. This involves safely lifting and securing the vehicle. Lastly, disconnecting the battery is a must to prevent electrical mishaps during the removal. Following these preparatory steps sets the stage for a successful transmission removal.

Gathering Your Tools and Equipment

Having the right tools makes all the difference. Here's a list of what you'll likely need:

• Socket set: Both metric and standard sizes, including deep sockets.
• Wrench set: A comprehensive set will cover most bolt sizes.
• Torque wrench: Crucial for tightening bolts to the correct specifications during reinstallation.
• Jack and jack stands: Heavy-duty ones are recommended for safety.
• Wheel chocks: To prevent the car from rolling.
• Transmission jack: This is almost essential for safely lowering the transmission.
• Penetrating oil: For loosening stubborn bolts.
• Pliers: For removing clips and hoses.
• Screwdrivers: Both flathead and Phillips head.
• Drain pan: For catching transmission fluid.
• Gloves and safety glasses: Protect yourself!
• Shop towels or rags: For cleaning up spills.
• Service manual: A lifesaver for torque specs and diagrams.

Having all these tools handy will save you time and frustration. Trust me; you don't want to be running to the auto parts store mid-job.

Safely Preparing the Vehicle

Safety is paramount. Follow these steps to ensure the vehicle is secure:

1. Park on a level surface: Engage the parking brake.
2. Chock the rear wheels: This prevents any unwanted movement.
3. Loosen the lug nuts: On the front wheels, but don't remove them yet.
4. Raise the vehicle: Using a jack, lift the front of the car and securely place it on jack stands. Make sure the jack stands are positioned on the vehicle's frame, not just the body.
5. Remove the front wheels: Now you can take those lug nuts all the way off and remove the wheels.

With the car safely raised and supported, you're ready to move on to the next steps.

Disconnecting the Battery

Before you start disconnecting anything electrical, disconnect the negative terminal of the battery. This prevents any accidental shorts or electrical damage. Use a wrench to loosen the nut on the negative terminal, then carefully remove the cable and tuck it away so it doesn't accidentally touch the terminal again.

Step-by-Step Transmission Removal

Alright, with the prep work done, let's get into the nitty-gritty of removing that transmission. The following steps detail the entire removal process, from draining the transmission fluid to detaching all necessary components and safely lowering the transmission. Paying close attention to each step is key for a successful removal.

Draining the Transmission Fluid

First things first, drain the transmission fluid. Locate the drain plug on the transmission pan. Place a drain pan underneath the plug, then use a wrench to remove the plug. Let the fluid drain completely. Once it's done, replace the drain plug with a new washer and tighten it to the specified torque.

Disconnecting Cables, Connectors, and Linkages

Now, disconnect everything that's attached to the transmission. This includes:

• Shift linkage: Disconnect the shift cable from the transmission. There's usually a clip or pin that holds it in place.
• Electrical connectors: Disconnect all electrical connectors attached to the transmission. Be careful not to damage the connectors. Label them if necessary, so you know where they go during reinstallation.
• Speedometer cable: If your car has a mechanical speedometer cable, disconnect it from the transmission.
• Ground straps: Disconnect any ground straps that are attached to the transmission.

Make sure everything is disconnected before moving on to the next step.

Removing the Starter and Other Obstacles

The starter often gets in the way, so remove it. Disconnect the electrical connections to the starter, then remove the bolts that hold it in place. Carefully remove the starter and set it aside. Also, remove any other components that might be obstructing the transmission, such as heat shields or brackets.

Supporting the Engine

With the transmission out, the engine will need support. Use an engine support bar or a jack with a wooden block to support the engine from above. This prevents the engine from tilting or falling when the transmission is removed.

Detaching the Transmission Mount

The transmission is held in place by a mount. Locate the transmission mount and remove the bolts that attach it to the transmission and the vehicle's frame. You may need to raise or lower the transmission slightly to relieve pressure on the mount.

Removing the Axles

The axles need to be disconnected from the transmission. Use a pry bar to carefully pop the axles out of the transmission. Be careful not to damage the seals in the transmission. If the axles are stuck, you may need to use a slide hammer with an axle puller attachment.

Lowering the Transmission

This is where the transmission jack comes in handy. Position the transmission jack under the transmission and secure it. Remove the remaining bolts that hold the transmission to the engine. Slowly lower the transmission using the jack. Make sure it's clear of all obstructions. Once the transmission is completely lowered, carefully remove it from under the car.

Post-Removal Inspection and Maintenance

Once the transmission is out, it's a good idea to inspect the surrounding components and perform some maintenance.

Inspecting the Flywheel/Flexplate

Inspect the flywheel (for manual transmissions) or flexplate (for automatic transmissions) for any signs of wear or damage. Look for cracks, excessive wear, or heat spots. If you find any problems, replace the flywheel or flexplate.

Replacing the Pilot Bearing/Bushing

If you have a manual transmission, now is a good time to replace the pilot bearing or bushing. This is a small bearing or bushing that supports the input shaft of the transmission. It's located in the center of the flywheel. Use a pilot bearing puller to remove the old bearing or bushing, then install the new one.

Checking Engine Rear Main Seal

Inspect the engine rear main seal for any signs of leaks. This seal prevents oil from leaking out of the back of the engine. If you see any oil around the seal, replace it.

Reinstalling the Transmission

Reinstallation is essentially the reverse of removal. Take your time and follow these steps carefully.

Preparing the Transmission for Installation

Before you reinstall the transmission, make sure it's clean and in good condition. Check the input shaft seal for any leaks and replace it if necessary. Apply a thin coat of grease to the input shaft splines.

Aligning the Transmission

Carefully lift the transmission into place using the transmission jack. Align the transmission with the engine. This can be tricky, so take your time. You may need to rotate the engine slightly to get the input shaft to line up with the clutch disc and pilot bearing.

Securing the Transmission

Once the transmission is aligned, install the bolts that hold it to the engine. Tighten the bolts to the specified torque. Install the transmission mount and tighten the bolts to the specified torque.

Reconnecting Everything

Reconnect the axles, shift linkage, electrical connectors, speedometer cable, and ground straps. Install the starter and tighten the bolts to the specified torque. Reinstall any other components that you removed.

Final Checks and Adjustments

Before you lower the car, double-check everything. Make sure all bolts are tightened to the correct torque. Make sure all connectors are securely attached. Fill the transmission with the correct type and amount of fluid. Reconnect the battery.

Final Thoughts

Removing and reinstalling a transmission is a challenging task, but it's definitely doable with the right tools, knowledge, and patience. Remember to take your time, follow the steps carefully, and don't be afraid to ask for help if you get stuck. Good luck, and happy wrenching!