Parts for your 2015 Isuzu D-max-Centre bearing

2015 Isuzu D‑MAX centre-bearing: what it does, and when to replace it

Short answer: the 2015 Isuzu D‑MAX commonly sold in Australia and New Zealand is fitted with a centre‑bearing (centre support bearing) because it uses a two‑piece tailshaft on most dual‑cab and space‑cab wheelbases. This isn’t guesswork, it’s supported by the Isuzu D‑MAX (RT50, 2012–2016) Workshop Manual in the Driveline/Propeller Shaft section, the Isuzu Electronic Parts Catalogue (RT50) which lists a centre support bearing assembly in the propeller shaft group, Autodata AU/NZ driveline data for 2012–2016 D‑MAX, and local driveline catalogues from Spicer/Hardy Spicer that specify a centre support bearing for D‑MAX 2012‑on. Note: some short‑wheelbase 2WD variants may run a single‑piece tailshaft without a centre‑bearing, but mainstream AU/NZ models do have one.

The centre‑bearing’s job is simple but critical: it supports the two‑piece tailshaft at the midpoint to keep angles controlled, reduce vibration, and protect the universal joints and gearbox/transfer case. On lifted vehicles or those that tow and carry regularly, it works even harder to keep things smooth under load.

Signs it’s on the way out include a thump or shudder on take‑off, a droning or humming noise at 40–80 km/h that changes with throttle, and visible cracking or sagging of the rubber support when inspected. Left too long, a failing centre‑bearing can accelerate uni‑joint wear and create gearbox or diff seal leaks due to vibration.

• Typical inspection interval: at every service or 10,000–15,000 km, especially if the ute tows, carries heavy loads, or has a suspension lift.
• Checkpoints: rubber isolator splits, bearing play or roughness when spun by hand, tailshaft alignment, and uni‑joint free play.

1. If replacement is needed, mark tailshaft phasing before removal to maintain balance.
2. Replace the centre‑bearing assembly, then re‑align and torque mounts to spec (refer to the workshop manual for RT50 torque figures).
3. After refit, road‑test for vibration under light and heavy throttle. If vibration persists, check tailshaft angles and mounts.

Many workshops replace just the centre‑bearing, though severely worn or out‑of‑balance shafts may be best rebuilt and balanced by a driveline specialist. Good quality rubber and correct installation angle make a big difference to longevity. For most owners, a quick look during scheduled servicing and early replacement when symptoms start will keep the D‑MAX driveline quiet and happy for the long haul.

FAQs

How do you tell if the centre‑bearing is failing on a 2015 D‑MAX?
Common giveaways are a shudder on take‑off, a mid‑speed drone, and rubber support cracking. If the bearing feels rough when spun or has noticeable play, it’s ready to be replaced. Noise that changes with throttle rather than road speed also points to the centre‑bearing or uni‑joints.

Can you replace just the centre‑bearing, or does the whole tailshaft need doing?
On most 2015 D‑MAX models, the centre‑bearing can be replaced separately. If the shaft is bent, out of phase, or the uni‑joints are worn, a full rebuild and balance by a driveline shop is smart value. Mark the shaft before disassembly to keep phasing correct.

What does a centre‑bearing replacement typically cost?
Parts vary with brand and spec, but many owners see parts in the low hundreds and 1.0–2.0 hours labour for straightforward swaps. Add balancing or uni‑joints and the bill climbs, but you’ll usually end up with a smoother, longer‑lasting driveline.