Parts for your 2007 Holden Commodore-Clutch master cylinder

2007 Holden Commodore clutch master cylinder

On manual-transmission 2007 Holden Commodore (VE series) models, a clutch master cylinder is absolutely fitted and relevant. This is documented in Holden’s VE Commodore Service Manual (Clutch Controls – Hydraulic), Gregory’s/Haynes workshop manuals for VE (2006–2013), and OEM transmission literature for the Aisin AY6 and Tremec TR‑6060, all of which describe a firewall‑mounted clutch master cylinder feeding a concentric slave cylinder inside the bellhousing.

The clutch master cylinder’s job is straightforward: when the driver presses the pedal, the master converts that movement into hydraulic pressure, pushing brake fluid through a hard line to the concentric slave/release bearing. That hydraulic pressure cleanly disengages the clutch, letting gears slot in without graunching. On the VE, the master is mounted on the firewall and is supplied by the brake fluid reservoir via a take‑off, so it uses the same DOT 4 fluid as the brakes. Because it’s hydraulic and self‑adjusting, pedal feel stays consistent as the disc wears—right up until seals age or fluid gets contaminated.

As part of regular servicing on a 2007 Commodore, it’s smart to treat the clutch hydraulics like the brakes:

• Flush/bleed with fresh DOT 4 every two years, or sooner if the fluid looks dark.
• Keep everything spotless—dirt or wrong fluid (never DOT 5 silicone) can swell seals.
• Check for dampness at the firewall, soft carpet near the pedal, or a falling reservoir level.
• Watch for symptoms: a spongy or sinking pedal, hard shifting into first/reverse, or a high bite point.
• Avoid spilling brake fluid on paint—have water handy to rinse any drips.

Replacement of the master cylinder is typically straightforward: disconnect the line at the bulkhead fitting, pop the clevis pin off the pedal, unbolt the master, then refit and bleed. Bench priming helps, and a pressure or vacuum bleeder makes the job cleaner. If the pedal still won’t come good, or there’s fluid weeping from the bellhousing, the concentric slave may be failing—unfortunately that’s gearbox‑out. If that happens, many owners take the chance to fit a new clutch kit and slave at the same time, saving labour down the track. Quality OE or reputable aftermarket parts are worth it for a consistent pedal and long service life.

Popular questions

Does a 2007 Holden Commodore have a clutch master cylinder?
Yes. Holden’s VE service information and mainstream workshop manuals specify a hydraulic clutch system that uses a firewall‑mounted master cylinder feeding a concentric slave inside the bellhousing.

What fluid does the clutch use, and how often should it be changed?
DOT 4 brake fluid. Bleed or replace it about every two years, or earlier if it darkens, to protect seals and keep pedal feel consistent.

Can the clutch be bled at home?
Yes. Bleed at the slave cylinder’s bleed point using pressure, vacuum, or a two‑person method. Keep the reservoir topped up and don’t spill fluid on paint. If there’s still no pedal or fluid drips from the bellhousing, the slave may be shot and the gearbox will need to come out.