How to repair car manual transmission

## How to Repair a Car Manual Transmission

### Difficulty

Intermediate

### Time Required

1-2 days

### Tools

Socket set
Wrench set
Screwdriver set
Jack
Jack stands
Transmission jack (optional)
Fluid pump or syringe
Gloves
Safety glasses

### Materials

New transmission fluid
Transmission filter (if applicable)
Gasket kit (if applicable)
New bolts (if applicable)

### Safety Precautions

Always wear gloves and safety glasses when working on your car.
Park your car on a level surface and engage the parking brake.
Allow the engine and transmission to cool before starting any work.
Support the car with jack stands before going underneath.

### Step-by-Step Instructions

1. Drain the Transmission Fluid

Locate the transmission pan and place a drain pan underneath.
Remove the drain plug and allow the fluid to drain completely.
If your transmission has a filter, remove it and inspect it for any signs of damage or wear.

2. Remove the Transmission

Disconnect the battery negative terminal.
Remove the starter.
Remove the driveshaft.
Disconnect the shift linkage.
Support the transmission with a transmission jack or a jack and blocks of wood.
Remove the transmission mount bolts.
Carefully lower the transmission and pull it out from under the car.

3. Inspect the Transmission

Once the transmission is removed, inspect it for any obvious signs of damage, such as cracks, leaks, or broken gears.
Remove the transmission case and inspect the internal components, such as the gears, synchros, and bearings.

4. Repair the Transmission

Replace any damaged or worn components.
Inspect the gaskets and seals and replace them if necessary.
Reassemble the transmission, making sure to torque all bolts to the specified specifications.

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5. Reinstall the Transmission

Carefully lift the transmission back into place.
Install the transmission mount bolts and torque them to the specified specifications.
Connect the shift linkage.
Install the driveshaft.
Install the starter.
Reconnect the battery negative terminal.

6. Fill the Transmission with Fluid

Locate the transmission fill plug and insert a fluid pump or syringe.
Fill the transmission with the specified type and amount of fluid.
Check the fluid level and add more if necessary.

7. Test the Transmission

Start the car and let it idle for a few minutes.
Shift through all the gears to make sure the transmission is functioning properly.
Check for any leaks or unusual noises.

Additional Tips

If you are not comfortable repairing the transmission yourself, it is recommended to take the car to a qualified mechanic.
When replacing gears or other internal components, it is important to use OEM parts or high-quality aftermarket parts.
Always follow the manufacturer’s specifications for fluid type and capacity.
If you have any doubts about your ability to repair the transmission, it is better to err on the side of caution and take the car to a mechanic.

## Common Problems and Solutions

### Grinding when shifting gears

Worn synchros
Damaged gears
Low transmission fluid level

### Difficulty shifting gears

Bent shift linkage
Worn clutch
Low transmission fluid level

### Transmission leaks

Worn or damaged gaskets or seals
Cracked transmission case
Loose bolts

### Noisy transmission

Worn bearings
Damaged gears
Low transmission fluid level

### Transmission failure

Major internal damage
Lack of maintenance
Overheating

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