Guide to Fixing the 2010 Mitsubishi Lancer's Transmission Shift Issues

In this detailed repair guide, we will discuss how to fix an occasionally reported, less typical problem with the 2010 Mitsubishi Lancer's transmission shifting. This aricle will provide an in-depth guide to diagnose and repair the shift issues, all while going through potential pitfalls and tips to ensure a sucessful repair.

Diagnosis

There can be numerous reasons for shift issues. Reasons can range from a simple software glitch to mechanical wear and tear. Let's dive down into the diagnostic procedures:

1. Use a scanning tool to check for any transmission related codes.
2. If there are codes, research them and narrow down your problem. Note that sometimes, a software update may resolve the issue.
3. If there are no codes or updating software does not resolve the issue, begin manual diagnostic procedures.

Tools Required

• Box end wrenches
• Screwdrivers
• Pliers
• Hydraulic Jack
• Jack stands
• Transmission fluid pump
• Return Spring

Manual Diagnostic

The classic telltale sign of a shift problem is disrupted shift patterns. Warning lights or strange noises can also indicate problems. Assuming this is the case, there are potential mechanical issues that need to be addressed. Here are the steps to manual diagnostic procedures:

1. Test drive the car and note the shifting patterns at different RPMS and speeds.
2. If shift problems occur at specific RPMS or speeds, it could be a bad shift solenoid.
3. Also, check for fluid leaks, as low transmission fluid levels can also be a reason for shifting problems.
4. If fluid level is low, fill it up to the required level and monitor the car's performance. If it resolves the issues, do a thorough check for leaks again at a later point.

Replacing Shift Solenoid

If it's concluded that the shift solenoid is the issue, follow the steps below to replace it.

1. Start by preparing your vehicle. Disconnect the battery, and set your car on the jack and stands.
2. Unbolt the transmission oil pan, and let the oil drain into a collection pan.
3. Locate the solenoid pack inside the transmission. It is usually located towards the front of the pan.
4. Unplug the electrical connector, then remove the solenoid pack mounting bolts.
5. Remove the shift solenoid and replace it with a new one.
6. Reinstall the transmission oil pan, and fill it with new transmission fluid.
7. Reconnect the battery, then lower the car and start the engine. Test-drive the vehicle ensure the issue has been resolved.

Pitfalls and Tips

• Always disconnect the battery to avoid any electrical issues.
• Regularly check your transmission fluid to monitor its levels and color.
• Never overfill your transmission fluid, as it can lead to erratic shifting as well.
• Make sure the oil pan is aligned properly while reassembling it.
• Always verify the replacement part is the correct one for your model before starting repairs.

This guide will help skilled mechanics tackle the tricky issue of shift problems with the 2010 Mitsubishi Lancer. It goes without saying that while we have tried to cover all the bases, some unique situations might need a different approach, but these general steps should guide you in the right direction.