Exchange diffs to every corner of New Zealand
Gearhead Diffs is one workshop at 104 Byron Street in Sydenham, Christchurch. Everything is rebuilt there. From there, around 120 exchange diffs on the shelf go out by courier to 49 towns across all 16 regions, freight free in both directions, with the return label for your old unit in the box.
How far, how fast
Indicative courier transit from Christchurch. Rural addresses allow an extra day.Heavy and oversize items such as complete beam axles travel with Move Logistics and are quoted by phone first. Exchange diff heads go on the standard courier network.
Pick your region
Each region page covers what the courier run looks like from Christchurch, the vehicles that part of the country tends to run, who can fit the unit near you, and the questions people ask before ordering from a distance.
Why one workshop works for the whole country
An exchange diff turns distance into a courier problem rather than a workshop problem. The rebuilt unit leaves Christchurch first, your vehicle is only off the road for the swap, and your old diff follows it back in the same box. Any mechanic can fit a diff head, so the fitting happens wherever you are and the specialist work happens here.
Repairs to your own unit work the same way in reverse: the diff travels, not the vehicle. Your local workshop pulls it, it comes to Sydenham on the courier, is rebuilt, and goes back for them to refit. For West Coast drivers there is a list of Greymouth and Hokitika workshops who inspect vehicles for us.
Whatever the region, the price includes a refundable core charge, freight is free in both directions on exchange diffs, and the warranty is 12 months or 20,000 km when the unit is fitted correctly and run on the specified Redline oil.