Parts for your 2007 Holden Commodore-Cluth slave cylinder

2007 Holden Commodore cluth-slave-cylinder

According to the Holden VE Series Service Manual (Clutch section), GM Service Information (VE Commodore, Clutch Controls), and transmission supplier data for the Aisin AY6 (V6 manuals) and Tremec TR‑6060 (V8 manuals), the 2007 Holden Commodore manual models use a concentric hydraulic release bearing—commonly called a cluth-slave-cylinder—mounted inside the bellhousing. Automatic models don’t use a cluth-slave-cylinder at all. So, it’s relevant and fitted on manual VE Commodores, but not on autos.

On a manual 2007 Holden Commodore, the cluth-slave-cylinder (the hydraulic release bearing assembly) is the bit that converts pedal pressure into clutch movement. Press the pedal, hydraulic pressure travels from the master cylinder and pushes the concentric unit to release the clutch. Being internal to the gearbox bellhousing, it’s neat and reduces linkage complexity, but it also means replacement is a gearbox-out job.

What it does day to day is simple: it gives a consistent, light pedal and clean clutch disengagement, which helps with smooth shifts and less driveline shock. Over time, seals can wear, fluid can darken, and the pedal can go soft or the clutch may not fully disengage—classic signs the cluth-slave-cylinder is on the way out. Because VE manuals typically share brake/clutch fluid, contaminated or old fluid can hasten seal wear.

Service advice most owners will appreciate:

• Refresh the clutch hydraulic fluid (DOT 4 quality) every 2–3 years or 40,000–60,000 km. Keep the reservoir clean and capped to avoid moisture ingress.
• At each service, check for weeping at the bellhousing and around quick-connect lines. A damp bellhousing or dropping fluid level is a red flag.
• If the gearbox is out for any reason—clutch, rear main seal, or gearbox work—replace the cluth-slave-cylinder as preventive maintenance. It’s relatively inexpensive compared with paying labour twice.
• Use new O-rings/seals on the hydraulic line, and bleed the system thoroughly using the bellhousing bleed point. A pressure or vacuum bleed saves grief, avoid pumping the pedal dry.
• When fitting a new unit, avoid touching the friction surfaces, align the clutch properly, and consider a full clutch kit (disc, pressure plate, release bearing) to keep everything matched.

Most owners see 120,000–200,000 km from a cluth-slave-cylinder depending on driving style and fluid care. If shifts feel crunchy when stationary, the pedal won’t return cleanly, or fluid is discoloured, it’s time to book it in. For autos, none of this applies—there’s no cluth-slave-cylinder in play.

Popular questions

Does every 2007 Holden Commodore have a cluth-slave-cylinder?
No. Only manual models have a cluth-slave-cylinder (the concentric hydraulic release bearing). Automatic Commodores use a torque converter and don’t have a clutch or slave cylinder.

Can a 2007 Commodore cluth-slave-cylinder be replaced without removing the gearbox?
No. Because it’s an internal concentric unit inside the bellhousing, the gearbox needs to come out. That’s why many techs recommend replacing the cluth-slave-cylinder any time the clutch is out.

What fluid should be used and how often should it be changed?
Use quality DOT 4 brake fluid in the shared reservoir and refresh it every 2–3 years. Clean fluid protects seals in the cluth-slave-cylinder and helps keep the pedal feel consistent.