clutch slave cylinder YouTube: Engineered Mojo
YouTube: Engineered Mojo

If you drive a car or truck with a manual transmission, then you probably use a slave cylinder every day. This lesser-known part can be the real culprit in several transmission issues, so it’s a great thing to familiarize yourself with and potentially save yourself a fortune down the road.

The clutch slave cylinder is a crucial part of the clutch system in manual transmission vehicles. It’s one of several steps in the process of converting mechanical energy through the cylinders’ hydraulic system. We’ll cover more details on what exactly a clutch slave cylinder is, how it works, and symptoms of a bad one in this article.

What Is a Slave Cylinder?

A clutch slave cylinder is a smaller cylinder connected to a larger master cylinder which are both parts of a larger hydraulic system for engaging the clutch. When you push the clutch pedal, a plunge inside the master cylinder forces hydraulic pressure through to the slave cylinder.

The slave cylinder is mounted on the transmission or in the bell housing and connects to the clutch wrench, which puts pressure on the clutch release bearing and pressure plate. This causes the clutch to disengage allowing for free gear movement.

Read More: Learn How to Replace a Clutch with This Handy DIY Video

Signs of a Bad Slave Cylinder

If your clutch feels unresponsive, it might be due to an issue with the hydraulic clutch cylinders. One common issue is a leak in the hydraulic tubes. If this type of leak occurs, you’ll notice that your clutch has more give before it kicks in.

Often, these cylinders will leak onto the floor. They are a common cause of visible leakage, so if you see fluid on the ground when you leave in the morning, in addition to a “spongy” clutch pedal feel, you are likely having issues with a clutch slave cylinder or clutch master cylinder. You may also notice cloudy brake fluid if your slave cylinder O-rings have begun to deteriorate.


Time for a trip to the mechanic!

Read More: Here Are a Few Ways to Avoid Auto Repair Shop Scams

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