Clutch Slave Cylinders Clutch Slave Cylinders

Clutch Slave Cylinders

What is a clutch slave cylinder?

A clutch slave cylinder is an actuated piston that moves the clutch fork (which holds the clutch release bearing) in and out based on the input or output of the clutch master cylinder.

When the clutch pedal is pressed or released it actuates the clutch master cylinder. This causes hydraulic fluid to be forced to or from the clutch slave cylinder causing it to move in or out.

What comes with a clutch slave cylinder?

Clutch slave cylinders are generally sold as individual units. On rare occasion the clutch master and slave cylinder are supplied together with the connecting hose line too. The stock image would show if this was the case or if additional parts were included.

How do I choose the correct clutch slave cylinder?

The best way to choose the correct replacement clutch slave cylinder is to obtain the original (OE) part number and search for parts that match it. Our website has a useful OE part number search tool which will show you parts that match your OE number.

If you are unable to obtain the OE part number here are some factors to consider when selecting a replacement part:

  • Number of gears (i.e. 5 speed or 6 speed etc)

  • Manual or semi automatic (fully automatic and CVT vehicles do not have a clutch

  • Transmission type / transmission code

  • Cruise control

  • Engine code

  • Vehicle manufacture date (this is not the date the vehicle was registered but the date it was made

  • Engine number sequence (up to or after as specific number/letter

  • VIN (chassis number) sequence (up to or after as specific number/letter

What brand of clutch slave cylinder should I choose?

Brands such as LuK, Sachs, and Valeo manufacture clutch parts for the original car brands however there are a good number of high quality aftermarket brands of the highest quality that meet or exceed the original specifications.

Brands such as Blue Print, Borg & Beck, Febi and LPR offer long warranties which show they have confidence in their products. We would recommend the brand that meets your budget and has the longest warranty cover period.

How can I tell my clutch slave cylinder needs replacing?

As there are several components on the clutch system it can be tricky to know which one of them is in need of replacement. If you are not sure we would always recommend that you have a qualified mechanic diagnose any problems.

Here are some symptoms of a failing or faulty clutch slave cylinder:

  • When pressing the clutch pedal it feels different, either more stiff or loose or has dropped to the floor

  • Leaking hydraulic fluid (brake fluid) near the transmission

  • It is much harder to change gear

  • Low hydraulic fluid (brake fluid)

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