Eaton Fuller holds the largest share of the heavy truck transmission market in New Zealand, and TRT is your Eaton Fuller specialist.

New and factory remanufactured Road Ranger units are stocked across 13, 15, and 18 speed, so when a gearbox goes down, you are not waiting on a unit to arrive from overseas.

TRT supports both the AS2 and AS3 AutoShift variants with full parts availability.

Our transmission specialists can identify your AutoShift from the ID tag or from the physical gearbox if the tag is missing - which means the right part gets ordered first time, without diagnostic guesswork adding days to your downtime.

Allison fully automatic transmissions are the standard choice for emergency vehicles, off-highway equipment, and specialist builds where consistent power delivery under varying load is non-negotiable.

TRT stocks Allison units and filters for the 3000 and 4000 series, with in-house support for enquiries across most commercial applications.

The ZF Astronic is the manual transmission of choice for European platform trucks, with Servoshift technology making gear changes across the full range quicker and quieter than a conventional manual.

TRT stocks multiple Astronic variants and can support parts and unit enquiries across the range.

TRT carries genuine Eaton Fuller rebuild bearing kits matched to specific Road Ranger transmission models.

Using a matched kit at rebuild time means the right bearings and components are confirmed from the start, which keeps the job on schedule and removes the risk of a return visit.

TRT's service exchange programme means you send in your old transmission and get back a quality remanufactured unit without waiting on a repair to your own gearbox.

Every exchange unit is rebuilt using genuine parts only and backed by a 12-month workmanship warranty. The programme covers transmissions, driveheads, steer axles, drive shafts, and brake calipers — with over 40 transmission units held in stock across New Zealand.