Gearhead Diffs is a Christchurch-based differential specialist providing repairs, rebuilds, upgrades, and exchange differentials for cars, utes, 4WDs, and performance vehicles.
We work exclusively on differentials, which means every job is properly diagnosed and built for long-term reliability, not guessed. From noisy diffs and oil leaks to performance upgrades and ratio changes, we provide practical solutions backed by experience.
Get an accurate, professional assessment from your local experts.
If your differential is making noise, leaking oil, or not performing as it should, we provide professional differential repairs to get it back to proper working order. We repair worn bearings, damaged gears, seals, and other internal components across front and rear differentials. Our focus is on accurate diagnosis and fixing the root cause, not just masking symptoms.
When a differential is too worn or damaged for a simple repair, a full rebuild is often the best long-term solution. We completely strip the differential, inspect all components, and rebuild it to OEM or performance specifications using quality parts. Rebuilds are ideal for high-kilometre vehicles, modified setups, or diffs that have suffered internal failure.
Our exchange differential service is designed to minimise vehicle downtime. We supply fully rebuilt exchange differentials that are ready to install, saving you the wait time of rebuilding your original unit. Each exchange diff is professionally rebuilt and tested, making it a reliable and cost-effective replacement option. Nationwide shipping is available.
Not sure what’s wrong with your differential? We provide thorough diagnostics to identify issues such as whining, clunking, vibration, or leaks. Our fault-finding process helps determine whether a repair, rebuild, or replacement is the most practical option, so you can make an informed decision before committing to work.
Limited slip differentials improve traction, stability, and overall drivability in both performance and off-road vehicles. We supply and install LSD units suited to street use, motorsport, towing, and 4WD applications. Our team can advise on the right LSD option based on how your vehicle is driven and what you want to achieve.
4WD differentials operate under higher loads and harsher conditions, especially off-road. We specialise in front and rear differential work for utes and 4WD vehicles, including repairs, rebuilds, upgrades, and traction improvements. Our solutions are built to handle demanding terrain and real-world use.
We offer differential upgrades and gear ratio changes to better suit your vehicle’s purpose. Whether you want improved towing performance, better off-road capability, or enhanced acceleration, changing the diff ratio can make a noticeable difference. We provide expert advice to ensure the setup matches your engine, transmission, and intended use.
Whining noises or oil leaks often point to worn bearings or failed seals. Replacing these early can prevent more serious internal damage and reduce repair costs. We inspect and replace differential bearings and seals using the correct setup procedures to ensure quiet operation and long-term reliability.
We supply a wide range of differential parts for both trade and retail customers. This includes bearings, seals, rebuild kits, and performance components. Whether you are repairing a differential yourself or need parts to support a workshop job, we can help ensure you get the correct components for your application.
Need a rebuild, an upgrade, or just some advice? Drop your vehicle details below and our team will be in touch to get it sorted.
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