Parts for your 2015 Holden Commodore-Cluth slave cylinder

2015 Holden Commodore cluth-slave-cylinder

For the 2015 Holden Commodore, a cluth-slave-cylinder is fitted to manual models and not used on automatics. Holden’s VF Commodore Workshop/Service Manual (GM Global Service Information), along with the gearbox makers’ documentation for the Tremec TR-6060 (V8 manuals) and Aisin AY6 (V6 manuals), specify a concentric hydraulic slave cylinder integrated with the release bearing. Automatic Commodores use a torque converter, so a cluth-slave-cylinder isn’t relevant to those variants.

On a manual 2015 Commodore, the cluth-slave-cylinder’s job is to turn pedal pressure—sent via the master cylinder and brake-fluid hydraulics—into the smooth movement that releases the clutch. Being a concentric type, it sits inside the bellhousing around the gearbox input shaft, pushing directly on the clutch diaphragm spring. That design helps pedal feel and packaging, but it also means the part is buried and the gearbox needs to come out to replace it.

Owners and workshops typically treat the cluth-slave-cylinder as a “while you’re in there” item. Any time the clutch is out for a new disc or pressure plate, fitting a new concentric slave and release bearing is smart insurance against doing the job twice. Quality parts, fresh sealing washers/O-rings, and following the factory bleeding procedure are key to a good result. Use the brake fluid grade specified in the owner’s/service manual (commonly DOT 4 in local workshops) and bleed until the pedal is consistent and free of air.

• Common signs it’s on the way out:
  • Spongy or sinking clutch pedal, hard gear engagement, or crunching into first/reverse
  • Brake-fluid loss with no obvious external leak