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Below is a comprehensive guide that outlines the components involved and the step-by-step process for adjusting the gear selector cable.

### Components Involved

1. **Gear Selector Cable**: This is the flexible cable that connects the gear shifter to the transmission. It transmits the movement of the gear shifter to the transmission.

2. **Gear Shifter**: Located inside the vehicle, this is the lever used by the driver to change gears.

3. **Transmission**: This is the component that houses the gears and is responsible for transmitting power from the engine to the wheels.

4. **Adjustment Nut**: This is typically located near the transmission end of the gear selector cable and is used to fine-tune the cable tension.

5. **Cable Mounting Bracket**: This holds the cable in place and can sometimes be adjusted to change the cable length or tension.

6. **Detent Mechanism**: This is part of the transmission that ensures the gear selector engages properly with the gears.

### Tools Required

– Wrench or socket set (depending on the size of the nuts)
– Screwdriver
– Pliers
– Measuring tape or ruler (optional)
– Torque wrench (if specified by the service manual)
– Service manual for the Mazda RX-2 (for reference)

### Step-by-Step Adjustment Process

1. **Preparation**:
– Ensure the vehicle is parked on a flat surface.
– Turn off the engine and engage the parking brake for safety.
– Remove any floor coverings or panels that might obstruct access to the gear shifter or the cable.

2. **Access the Gear Selector Cable**:
– Locate the gear shifter inside the vehicle. You may need to remove the shifter boot and any surrounding trim to access the cable connection.
– Follow the cable down to the transmission. This may require you to lift the vehicle using a jack and secure it with jack stands to access the undercarriage.

3. **Inspect the Cable**:
– Check the cable for any signs of wear, fraying, or damage. If the cable is compromised, it should be replaced before adjustment.
– Ensure that the cable is properly routed and not pinched or kinked.

4. **Loosen the Adjustment Nut**:
– Locate the adjustment nut on the cable near the transmission. This may be a hex nut that can be loosened with a wrench.
– Use the wrench to loosen the nut, but do not remove it. This will allow the cable to move for adjustment.

5. **Adjust the Cable Tension**:
– With the adjustment nut loosened, pull the cable housing gently to remove any slack.
– Shift the gear lever into the neutral position to ensure the cable is properly aligned.
– While holding the cable in the correct position, tighten the adjustment nut to secure the cable in place.

6. **Check the Shifting**:
– Move the gear shifter through all the gears (including reverse) to ensure smooth operation and proper engagement.
– Ensure that you can easily select all gears and that there is no binding or excessive play.

7. **Final Adjustments**:
– If the gear selector does not engage properly in any gear, you may need to repeat the adjustment process.
– Make small adjustments to the cable tension until the gear shifting is smooth and accurate.

8. **Reassemble**:
– Once satisfied with the adjustment, reassemble any components you removed, such as the shifter boot and trim.
– Ensure that all screws and nuts are tightened to the manufacturer’s specifications.

9. **Test Drive**:
– Start the vehicle and take it for a test drive to ensure the gear shifting is functioning correctly under normal driving conditions.
– Pay attention to any unusual noises or resistance when shifting gears.

### Conclusion

Adjusting the gear selector cable on a Mazda RX-2 can be a straightforward process if you follow the steps carefully. Always refer to the vehicle’s service manual for any specific details or torque specifications related to your particular model year. Proper adjustment will ensure smooth and reliable gear shifting, enhancing the overall driving experience.
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