BLOG CATEGORY · 3 ARTICLES
Case Studies
Real jobs from the workshop in Sydenham: what came in, what we found when we pulled it apart, and what it took to fix properly.
Case Studies · 20 July 2026 · 3 min read Isuzu D-Max diff failure Isuzu D-Max diff failure is common in the open carrier gears, causing clunking, and total loss of drive. Learn the signs, and fixes. 
How-To Guides · 10 June 2026 · 5 min read Ball Bearings vs Tapered Roller Bearings in Differentials Ball bearings vs tapered roller bearings: discover how each design works and why manufacturers use them in differentials. 
Troubleshooting · 8 June 2026 · 3 min read Lifetime Diff Oil, Is It Really Lifetime? Manufacturers call it lifetime oil, but is it really? Learn the facts about differential oil and why changing it may save you thousands. Other topics
Troubleshooting Diff noises, leaks, vibrations and failures explained: what the symptom usually means, what it costs to put right, and when a repair or an exchange diff is the better call. How-To Guides Plain English technical guides from the bench: how differentials, LSDs and lockers work, how to identify your diff, work out ratios and choose the right parts. Upgrades LSDs, lockers, gear ratios, axles and bushes: what each upgrade does, who it suits, and what we fit at Gearhead Diffs for street, track, towing and off road.