Minimise Downtime.
Maximise Uptime.

Remanufactured truck transmissions and differentials on exchange, ready when you need them.


✔ Over 400 exchange units in stock
✔ Dyno‑tested to OEM specifications
✔ 1‑year unlimited kilometre warranty


How it works


  1. Tell us your vehicle and the unit you need.
  2. Our commercial team confirms availability.
  3. We fit your exchange unit and get you back on the road.


See Why Fleets Choose Mayfair

Mayfair Gearbox helps you minimise downtime with:

Exchange units in stock:

Commercial transmissions and differentials ready when you need them, including remanufactured Allison transmissions from an Allison Approved Remanufacturer.

Remanufactured to OEM specification:

Every unit is stripped, thoroughly cleaned, rebuilt using OEM components and dyno tested to the manufacturer’s specifications, backed by 24 OEMs.

Support where you need it:

On‑site removal and replacement, 24‑hour national roadside assistance and a 1‑year unlimited kilometre warranty.