Parts for your 2005 Holden Commodore-Driveshafts

2005 Holden Commodore driveshafts (tailshafts): what they do and how to look after them

Driveshafts are absolutely relevant to the 2005 Holden Commodore. Technical references including the GM Holden VZ Service Information, Gregory’s VY–VZ Commodore repair manual, and driveline supplier data all note the VZ Commodore’s rear‑wheel drive layout uses a tailshaft (propeller shaft) to send torque from the transmission to the rear differential. Most sedans and wagons run a two‑piece tailshaft with a centre support bearing, utes may vary by spec. So yes—this model is fitted with driveshafts, and they’re a key part of how the car puts power to the road.

On a VZ, the driveshaft’s job is to transfer engine power smoothly while allowing for suspension and gearbox movement. It does this via universal joints and/or CV joints, a slip yoke or spline, and a centre bearing on two‑piece units. Correct balance and joint “phasing” keep vibrations down, protecting the gearbox, diff, and cabin comfort.

As part of regular servicing, it’s smart to give the tailshaft a once‑over every 10,000–15,000 km (or at each oil change):

• Check for vibration under load or around 80–110 km/h, clunks on take‑off, or shudder in reverse—classic signs of worn unis, centre bearing rubber, or a fatigued coupling/flange.
• Inspect universal/CV joints for play or binding, look for dry, rusty cup seals or split CV boots.
• Examine the centre support bearing for cracked rubber or sagging. Any tearing usually calls for replacement.
• Scan for impact damage, missing balance weights, or weeping from the transmission rear seal at the slip yoke.

When replacing a driveshaft or its components:

1. Mark the flanges and yokes before removal to preserve balance and phasing.
2. Use new flange bolts with threadlocker and torque them to the Holden specs in the VZ SI manual.
3. If the shaft’s been apart or new joints fitted, have it professionally balanced.
4. After refit, road‑test for vibration under light and heavy throttle, recheck fasteners after a short run.

There’s no fixed replacement interval—quality unis and the centre bearing often last 150,000–250,000 km if driven gently. However, any persistent vibration, knocking, or visible joint play means it’s time to sort it. Keeping the tailshaft healthy helps the Commodore feel tight, quiet, and dependable on long Kiwi and Aussie motorway runs alike.

Popular questions about 2005 Holden Commodore driveshafts

Do the V6 and V8 VZ Commodores use the same tailshaft?
Not always. Lengths, yokes, and joint styles can differ between transmissions (auto vs manual), wheelbase, and body style. Always match by VIN, gearbox type, and diff flange pattern. A driveline shop can measure your existing unit if the part history is unknown.

What’s the most common cause of tailshaft vibration on a VZ?
Typically a worn centre support bearing on two‑piece shafts, followed by tired universal joints or a missing balance weight after an impact. Less commonly, a bent shaft or incorrect joint phasing after previous work will cause a speed‑specific shudder.

Can a failing tailshaft damage other components?
Yes. Prolonged vibration can stress the transmission rear housing, flog out the diff pinion bearings, and even loosen exhaust mounts. Fixing the root cause early is far cheaper than chasing knock‑on damage later.