Exchange diffs and diff parts for Auckland
Auckland has no shortage of mechanics, but it has very few workshops that only do differentials. That is what we are. One workshop in Christchurch, around 120 rebuilt exchange diffs on the shelf, and a courier network that puts a unit in Auckland typically two to three working days after it leaves Sydenham. Freight is free both ways.
The Auckland fleet is a mix we see nowhere else in the country. Plenty of Commodores and Falcons still earning their keep, trade vans and Hiaces working the motorways all day, and a growing number of Ranger, Hilux and Colorado utes towing boats to the Hauraki Gulf on weekends. Stop start traffic on the Southern Motorway is surprisingly hard on a diff: constant load reversal wears the carrier, and a noisy pinion bearing will not improve by sitting in a queue.
For Auckland workshops the exchange model has a simple appeal: the car is on the hoist once, for a few hours, instead of occupying a bay while a rebuild is sourced and done. Trade pricing is available once you have an account.
How it works from Auckland
Four steps. Freight is on us in both directions.2 to 3 working days, typically
Dispatched from Christchurch, across Cook Strait on the freight network, then out on the local courier run.
Indicative only. Transit depends on the courier network and the time of day the order is placed. Tracking is emailed when the unit leaves the workshop.
- Rural delivery addresses: allow an extra working day each way.
- Oversize or heavy items such as complete beam axles travel with Move Logistics and are quoted by phone before anything is charged.
- Freight on exchange diffs is free in both directions. The return label for your old unit is in the box.
Vehicles we see a lot from Auckland
Commodore and Falcon rear ends, trade vans and the weekend tow utes. The units we would expect to send to Auckland most often.
Made to order Holden Commodore VT-VZ Diff Rebuilt Exchange 3.73 M80 LSD Holden $2,495 incl GST and $250 refundable core charge Add to cart 
In stock · 5 units Ford Falcon BA BF Rebuilt LSD Exchange Diff Ute Ford From $3,195 incl GST and $250 refundable core charge Choose options 
In stock · 3 units Ford Ranger PK / PJ Rebuilt Exchange Rear Diff Ford $2,765 incl GST and $250 refundable core charge Add to cart 
In stock · 5 units Toyota Hilux Rebuilt Exchange Diff Toyota From $1,795 incl GST and $250 refundable core charge Choose options 
In stock · 5 units Toyota Hiace Rebuilt Exchange Diff Toyota From $1,795 incl GST and $250 refundable core charge Choose options 
In stock · 5 units Holden Colorado RG Rebuilt Exchange Diff Holden $2,095 incl GST and $250 refundable core charge Choose options 
Low stock · 1 left Holden Commodore VE/VF Disctrac LSD Holden · Disctrac $1,395 incl GST Add to cart 
In stock · 4 units Borg Warner IRS M80 Bearing Kit Gearhead Diffs $595 incl GST Add to cart Not seeing your vehicle? Around 120 units are on the shelf and not all are online yet. Send your rego and the team will check.
Fitting it near you
With the density of workshops across Auckland, you will not have to look far for someone to fit the unit. Any general mechanic can do a diff head swap, and for Commodore and Falcon IRS units the fitting notes that come in the box cover what is different about them. The team is on the phone if the workshop wants to check anything model specific before they start.
If you are a workshop yourself, the exchange unit lets you quote the customer a firm price and a one visit job. Order before 2pm and it leaves Christchurch the same day in most cases.
Guides worth reading before you order
All articles
Troubleshooting Repair or Exchange Diff: Which One Do You Need? Repair or exchange diff - which is right for your vehicle? NZ-wide free freight, 80+ models in stock, and core charge pricing explained. 
Upgrades Best LSD for Street Use: Helical vs Clutch-Type LSD Helical or clutch-type LSD for the street? How each limited-slip diff works, the real pros and cons, and which is best for your daily driver. 
Troubleshooting What Causes Diff Whine? (And How to Fix It) What causes diff whine? Learn the common reasons for diff noise and how to fix it before it leads to serious drivetrain damage. Ordering from Auckland: common questions
Do I have to send my old diff before you ship?
You do not. The rebuilt diff goes out first, you fit it, then the old one goes back in the same box. The core charge built into the price is the only security held, and it comes back to you once the old gears have been checked and found fit to rebuild.
What happens with the core charge?
It is built into the price, not added later. You pay once, fit the exchange unit, and send the old one back on the prepaid label. The refund is processed once the old crownwheel and pinion have been inspected and found reusable. Badly damaged gears mean the core charge is kept, and that is the end of it. No surprise invoice.
Can I do the swap myself?
You can, and plenty of customers do. The unit comes with fitting notes, the ratio is tagged on the housing, and the team is a phone call away if something does not look right. The warranty stays valid when the diff is fitted correctly and run on the specified Redline oil. If the job means pulling a beam axle, pressing bearings or setting up a front diff on a 4WD, a workshop is usually money well spent.
What if the diff that arrives does not fit my vehicle?
The diff is matched to your rego and ratio before dispatch, which catches almost every mix up. If something still does not line up when it arrives, do not fit it. Ring the team, the right unit is confirmed and sent, and the return freight on the wrong one is handled by the workshop.