Engine and transmission rebuild
Eaton Fuller Puller Transmission Rebuild
Your Truck's Stuck in Gear. Every Hour Down Is Money Gone.
Galeeco Automotive rebuilds Eaton Road Ranger and Fuller heavy truck transmissions across Auckland — with specialist technicians, honest diagnostics, and a fixed written quote before any teardown begins.
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When a Road Ranger gearbox starts slipping, grinding, jumping out of gear, or simply refuses to select a ratio, your truck isn’t just uncomfortable to drive — it’s a liability. For owner-operators and fleet managers across Auckland, a heavy truck off the road means delayed deliveries, broken contracts, and a schedule that doesn’t bounce back easily.
The Eaton Road Ranger is one of the most durable transmission designs ever put into a heavy commercial vehicle. When it fails, it’s almost always fixable — and almost always worth fixing. But it needs to be done right, by people who know the specific architecture of these gearboxes: the main shaft, the countershaft, the range and splitter sections, and the air system that controls them all.
At Galeeco in Mt Wellington and Mt Roskill, we rebuild Road Ranger transmissions with the precision they deserve. We’ll tell you exactly what failed, exactly what a correct rebuild involves, and exactly what it will cost — before a single component is disassembled.
A Heavy Truck Gearbox Failure Is a Business Crisis — Not Just a Repair Job
A Road Ranger transmission problem doesn’t creep up slowly. One day it shifts cleanly. The next, it’s jumping out of fifth under load, refusing to engage the splitter, or grinding into reverse at the depot. For an owner-operator running a single prime mover out of South Auckland, that’s your entire income parked up at the roadside.
For fleet managers running tipping trucks, curtainsiders, or refrigerated linehaul units across the Auckland region, a downed truck cascades fast. A driver waiting at a site, a client ringing for an ETA, a delivery window missed — the financial damage compounds quickly and the reputational damage lasts longer.
The Road Ranger is a tough gearbox. It’s not supposed to fail often. When it does, the cause is almost always identifiable — worn synchros, a failed bearing, a cracked range section housing, air system contamination, or a problem that was masked by a driver who got good at working around it. At Galeeco, we find the actual cause, fix it properly, and get your truck back on the road with a written warranty behind the work.
What’s Included in a Roadranger Rebuild?
Full disassembly and inspection
Replacement of worn gears, bearings, synchros, seals, and gaskets
Precision reassembly to OEM specs
Bench testing for smooth operation
Optional clutch and flywheel inspection
We use OEM or high-quality aftermarket parts to ensure long-lasting results under the toughest driving conditions.
Why Auckland Operators Choose Galeeco for Road Ranger Work
1. We know Road Ranger and Fuller gearbox architecture specifically — not just transmissions generally.
The Eaton Road Ranger family — 9-speed, 13-speed, 15-speed, 18-speed — shares a core constant-mesh design but each configuration has specific wear patterns, range and splitter behaviour, and air circuit characteristics. We understand how the twin-countershaft layout distributes load, why the splitter section bears disproportionate wear in stop-start urban routes, and why the range cylinder fails when air system maintenance is deferred. We don’t learn this on your truck.
2. Full air system assessment — not just the gearbox mechanicals.
The Road Ranger’s pneumatic range and splitter control system is a frequent contributor to gearbox problems that get misdiagnosed as mechanical failures. A leaking range cylinder, a sticky slave valve, or contaminated air supply can cause range engagement failures, splitter hunting, and premature synchroniser wear. We inspect the complete air circuit as part of every diagnosis — because fixing the gearbox without fixing the air system is a partial repair.
3. Full diagnostic write-up and fixed quote before any teardown.
We carry out a comprehensive diagnostic assessment — including road test, air pressure testing, and a preliminary inspection — before stripping the gearbox. You receive a written fault summary and an itemised quote. No work proceeds until you’ve approved it. No surprises at the end.
4. In-house gearbox reconditioning — no third-party delays.
The transmission is stripped, cleaned, measured, and rebuilt at our workshop. We don’t send components offsite and lose control of your timeline. Faster for you. Clear accountability throughout.
5. Genuine Eaton parts and quality equivalents — clearly specified in the quote.
For Road Ranger rebuilds, we specify what parts are being used: genuine Eaton where it matters most, quality-equivalent where the specification is met and the cost saving makes sense for the operator. That decision is always disclosed and always yours to approve.
6. Driver input taken seriously during diagnosis.
The driver knows this gearbox better than anyone. How it behaves under load, which ratio it prefers to jump out of, whether the range engages cleanly at temperature — this information changes how we approach the diagnosis. We ask. We listen. We use it.
7. Honest turnaround times with early communication.
Most Road Ranger gearbox rebuilds at Galeeco complete within 5–8 working days. If parts need to be sourced or if something unexpected turns up during teardown, we tell you early — not on the day you were expecting to collect.
What Happens When Your Truck Comes Into Galeeco
Step 1 — Road Test, Air System Check, and Fault Documentation
The process starts before the gearbox is removed. We road test the truck (or conduct a static assessment if it’s undriveable), document every symptom — shift quality through each range, splitter response, range engagement force, oil contamination — and run an air pressure test on the range and splitter circuits. You receive a written fault report before any work is quoted or approved.
Step 2 — Fixed Quote and Written Approval
Based on the diagnostic, we prepare a detailed, itemised quote covering parts, labour, and any associated components such as the range cylinder, slave valve, or output shaft seal replacement. Work doesn’t begin until you’ve reviewed and signed off the quote in writing. No exceptions. No verbal agreements that turn into larger bills.
Step 3 — Transmission Removal and Full Teardown
The gearbox is removed, cleaned externally, and fully disassembled. The main shaft, countershafts, gear clusters, synchroniser assemblies, bearings, and range/splitter section are all measured and inspected. Every measurement is recorded against Eaton specification tolerances. Components that are outside spec or showing failure-mode wear are flagged for replacement and discussed with you before parts are ordered.
Step 4 — Reconditioning, Parts Replacement, and Precision Reassembly
Worn synchronisers, bearings, and seals are replaced. The range section housing is inspected for cracking, the shift rails and forks are checked for wear and straightness, and the countershaft assemblies are assessed for twist and bearing wear. The gearbox is rebuilt to Eaton tolerances, with all clearances measured and recorded. The air circuit components — range cylinder, slave valve, fittings — are replaced or serviced as required.
Step 5 — Reinstallation, Air Circuit Test, and Road Test
The rebuilt transmission is reinstalled, the air system is bled and pressure-tested, and the truck is taken through a full road test under load conditions. Every ratio — including all range and splitter positions — is cycled through and confirmed. Oil is filled to specification and the truck is signed off only when the gearbox performs cleanly across the complete shift pattern.
Road Ranger and Heavy Gearbox Types We Work On
Eaton Road Ranger — 9-Speed (RT/RTO 9-speed series)
The standard 9-speed Road Ranger, widely used in medium-heavy commercial trucks across New Zealand. Common issues: worn main shaft synchronisers, countershaft bearing failure, range cylinder seal degradation.
Eaton Road Ranger — 13-Speed (RT/RTO/RTOO 13-speed)
The 13-speed is the most common configuration found in New Zealand linehaul prime movers and heavy tipper trucks. The additional deep-reduction low range makes it particularly common on vehicles doing mixed highway and site work. We rebuild all variants including the RTOO overdrive configuration.
Eaton Road Ranger — 15-Speed (RT/RTO 15-speed)
The 15-speed adds a low-range auxiliary section to the 13-speed platform. Common in heavy linehaul and combination B-train operations. The additional range section complexity requires careful attention during reassembly.
Eaton Road Ranger — 18-Speed (RTLO/RTLOF 18-speed)
The 18-speed Road Ranger is the most complex configuration and the most commonly found on higher-GVM combinations and heavy haulage work in New Zealand. Specific wear patterns in the low-range auxiliary section are well documented on this unit. We rebuild 18-speeds regularly at both Auckland workshops.
Eaton Fuller Transmissions
The Fuller RT/RTO/RTOO range shares significant architecture with Road Ranger units and is rebuilt using the same methodology. If your truck runs a Fuller-badged gearbox, our capability covers it fully.
Allison Automatic Transmissions (Heavy)
For heavy commercial vehicles fitted with Allison automatic transmissions — including the 3000 and 4000 series commonly found in tankers, refuse vehicles, and municipal trucks across Auckland — Galeeco offers full diagnostic, service, and rebuild capability.
Transfer Cases and Differentials
We also rebuild and recondition transfer cases and differentials on heavy commercial vehicles as part of comprehensive drivetrain work. If your truck has a drivetrain issue beyond the gearbox, we can assess and quote the full scope in one visit.
Frequently Asked Questions — Road Ranger Gearbox Rebuild Auckland
How much does a Road Ranger transmission rebuild cost in Auckland?
A Road Ranger transmission rebuild in Auckland typically costs between $3,500 and $9,500 NZD, depending on the gearbox configuration (9, 13, 15, or 18-speed), the extent of internal wear, and whether ancillary components such as the range cylinder, slave valve, or output shaft seals require replacement. A standard 9-speed Road Ranger rebuild generally falls in the $3,500–$5,500 range. A full 13-speed rebuild typically costs $5,000–$7,500. An 18-speed full overhaul — the most complex Road Ranger configuration — commonly runs $6,500–$9,500 in Auckland. At Galeeco Automotive, you receive a fixed, itemised written quote after a full diagnostic before any teardown begins. There are no surprise bills.
How long does a Road Ranger gearbox rebuild take at Galeeco?
Most Road Ranger gearbox rebuilds at Galeeco Automotive are completed within 5 to 8 working days from the point of quote approval. In-house reconditioning means there are no delays waiting on outside machine shops. Standard 9 and 13-speed rebuilds where parts are in stock typically complete in 5–6 working days including road test. 18-speed rebuilds and cases requiring sourced parts may take up to 8 working days. Galeeco provides a realistic completion date at the start of every job and communicates proactively if the timeline changes — so you can plan your fleet schedule around a known date.
What are the common symptoms of a failing Road Ranger transmission?
Common symptoms of a failing Road Ranger transmission include: jumping or popping out of gear under load (especially in a specific ratio), difficulty or resistance engaging the high or low range, splitter refusing to engage or engaging only partially, excessive gear noise or grinding when changing ratios, a stiff or vague shift lever with no clear gear selection, unusual vibration through the gearstick at road speed, and oil leaks from the main case, input shaft, or output shaft seals. Air circuit problems — such as slow range engagement or splitter hunting — are often mistaken for mechanical gearbox failure but are caused by leaking range cylinders, slave valves, or contaminated air supply. At Galeeco, we diagnose the air system separately before pulling the gearbox, to avoid a full teardown on what turns out to be a pneumatic fault.
Is it worth rebuilding a Road Ranger transmission, or should I replace it?
In most cases, rebuilding a Road Ranger transmission is significantly more cost-effective than sourcing a replacement unit — especially for less common configurations like the 15 or 18-speed. A remanufactured Road Ranger replacement unit in New Zealand typically costs $8,000–$15,000 plus fitting. A thorough rebuild at $5,000–$9,500 restores the same gearbox to Eaton specification with a full warranty on parts and workmanship. The rebuilt unit also has a known maintenance history — something a second-hand replacement cannot guarantee. Galeeco will give you an honest assessment: if the gearbox has suffered catastrophic damage that makes a rebuild uneconomical, we’ll say so and discuss replacement options.
Can you fix a Road Ranger air system problem without doing a full rebuild?
Yes, absolutely. Not every Road Ranger gearbox problem requires a full mechanical rebuild. A significant proportion of range and splitter engagement failures are caused by air circuit faults — a cracked or worn range cylinder, a leaking slave valve, a contaminated air dryer, or a split feed line. These can often be diagnosed and repaired without removing or dismantling the gearbox mechanically. At Galeeco, we always assess the air circuit first, because fixing a pneumatic fault is far less expensive than a full rebuild. If the air system is the cause, we fix that. If mechanical wear is also present, we’ll quote both options clearly and let you decide the scope.
Where is the Galeeco Mt Wellington workshop for heavy truck transmission work?
The Galeeco Mt Wellington workshop is at 65 Leonard Road, Mount Wellington, Auckland 1060. It is accessible from the Southern Motorway (SH1) via the Mt Wellington Highway interchange and has heavy vehicle access suitable for prime movers, rigids, and tippers. The workshop serves heavy truck operators from Mt Wellington, Penrose, Otahuhu, Onehunga, and the Port of Auckland corridor. If your truck is undriveable, the team can help coordinate heavy recovery towing. Phone: 022 472 4444. For urgent breakdowns, call the Galeeco hotline on 027 734 4445.
Where is the Galeeco Mt Roskill workshop and which areas does it serve?
The Galeeco Mt Roskill workshop is at 87 Carr Road, Mount Roskill, Auckland 1041. It is accessible from the Southwestern Motorway (SH20) via the Hillsborough Road interchange, serving operators working the Western Ring Route, Māngere industrial zone, and the south-western freight corridor. The workshop is accessible for recovery vehicles and rigid trucks. Phone: 022 567 2249. For after-hours breakdown coordination, call 027 734 4445.
Does a Galeeco Road Ranger rebuild come with a warranty?
Yes. All Road Ranger transmission rebuilds at Galeeco Automotive are covered by a warranty on both parts and workmanship. Genuine Eaton parts and quality-equivalent parts carry their own manufacturer warranties; Galeeco’s labour warranty covers the rebuild itself. Warranty terms are set out clearly in the written quote you receive before any work starts — so you know exactly what is covered, for how long, and under what conditions. There are no vague verbal assurances. Everything is in writing before a bolt is touched.
Do you service or rebuild other heavy truck transmissions, not just Road Ranger?
Yes. Galeeco Automotive works on a range of heavy transmission types beyond Road Ranger, including Fuller RT/RTO/RTOO gearboxes, Allison automatic transmissions (3000 and 4000 series), and transfer cases and differentials on heavy commercial vehicles. If you’re not sure whether we can help with your specific gearbox, call 027 734 4445 and describe what you’re running. We’ll tell you honestly whether it’s within our capability or whether you’d be better served elsewhere.
My truck has broken down and can't move. Can Galeeco help coordinate recovery?
Absolutely. If your heavy truck is undriveable due to a gearbox failure — whether it’s on the Southern Motorway, at a depot in Penrose, or at a job site in South Auckland — call the Galeeco hotline on 027 734 4445. We can help coordinate heavy recovery towing to the nearest Galeeco workshop (Mt Wellington at 65 Leonard Road, or Mt Roskill at 87 Carr Road), advise on Auckland-based heavy recovery operators in your area, and make sure the receiving bay is ready and the right people are expecting your truck. Getting your vehicle off the road and into specialist hands quickly limits secondary damage and gets you back running faster.
Can you handle fleet contracts for multiple trucks needing Road Ranger servicing?
Yes. Galeeco works with fleet operators across Auckland and can structure scheduled Road Ranger gearbox inspections, services, and rebuild work around your fleet’s operational calendar. Preventive gearbox servicing — including oil changes, breather checks, and air circuit inspections — is far more cost-effective than emergency rebuilds. If you’re managing multiple heavy trucks in the Auckland region, call 027 734 4445 to discuss a service arrangement that keeps your fleet running rather than reacting to failures.
BOOK YOUR ROAD RANGER GEARBOX REBUILD TODAY
Let’s Get Your Truck Back on the Road
You don’t need to know exactly what’s wrong. You just need to get it to people who do.
Whether the gearbox started playing up last week and you’ve been managing it, or it failed completely this morning — bring it to Galeeco, or call us and we’ll help coordinate getting it here. We’ll diagnose it properly, give you a straight answer on what’s needed, and provide a fixed written quote before any work starts.
There are three ways to get started:
Call us now — describe what the truck is doing and we’ll give you an honest first assessment over the phone. We can also help coordinate towing if the truck is stranded.
Drive in or arrange recovery — both workshops are equipped for heavy truck arrivals. Mt Wellington and Mt Roskill, open 6 days a week.
Book at galeeco.co.nz — submit an enquiry online and we’ll respond within one business day to confirm an assessment time.
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