Rev Matching: A Technique to Smooth Your Manual Transmission Shifts

What is Rev Matching?

Rev matching is a technique that involves matching the engine’s rotational speed (RPMs) to the speed of the transmission input shaft before engaging the clutch. This results in a smoother shift, reduces driveline shock, and prevents the transmission from grinding.

Why is Rev Matching Important?

Rev matching is important because it helps to:

• Reduce driveline shock, which can damage the transmission and other components
• Prevent the transmission from grinding, which can wear out the gears
• Smooth out shifts, making the driving experience more enjoyable

How to Rev Match

Rev matching is a skill that takes practice to master. Here are the steps on how to do it:

1. As you approach the desired shift point, depress the clutch.

2. While the clutch is depressed, quickly increase the engine RPMs to match the speed of the transmission input shaft.

3. Slowly release the clutch while simultaneously decreasing the engine RPMs.

4. Once the clutch is fully engaged, the shift will be complete.

Tips for Rev Matching

• Practice makes perfect. The more you practice rev matching, the easier it will become.
• Listen to the engine sound. The sound of the engine will give you clues about the RPMs.
• Use the tachometer. The tachometer can help you to accurately match the RPMs.
• Don’t be afraid to experiment. Everyone’s rev matching technique is slightly different. Find what works best for you.

Troubleshooting Rev Matching

If you’re having trouble rev matching, here are a few tips:

• Make sure you’re depressing the clutch fully.
• Try increasing the engine RPMs more quickly.
• Try decreasing the engine RPMs more slowly.
• If you’re still having trouble, ask a mechanic for help.

Conclusion

Rev matching is a valuable technique that can help you to smooth out your manual transmission shifts and extend the life of your transmission. With practice, you’ll be able to master this technique and improve your driving experience.