Adelaide's transmission specialists, from a quick service to a full rebuild
Trusted Mechanical handles the full transmission and driveline picture for southern Adelaide drivers. Whether you want a routine transmission service Adelaide owners can rely on, a slipping or harsh-shifting box diagnosed, or a full rebuild done properly, you are dealing with a transmission specialist that fixes the actual fault, not the easy guess.
We cover routine automatic and manual transmission servicing (fluid and filter, the maintenance most people skip until it is too late), diagnosis and repair of slipping, shuddering and harsh-shifting boxes, full gearbox rebuilds when the damage is done, and the Stocklock torque-converter lock-up upgrade that saves fuel and heat on towing 4WDs.
Honest diagnosis is the whole point.Many "transmission problems" are a fluid or solenoid issue, not a worn box, and we tell you which it is before any money is spent. We work on both autos and manuals, on everyday cars, and on 4WDs and tow vehicles in particular. Describe what your transmission is doing and we will tell you what it actually needs. It is part of our wider car servicing under one roof.
Our transmission services
Three core driveline services, each done by a workshop that diagnoses the fault before it quotes the job. Pick the one that fits what your vehicle is doing.
Transmission Service
Automatic and manual transmission servicing: fluid, filter and a full health check to keep your box shifting smoothly and avoid an expensive failure. The maintenance that pays for itself.
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Gearbox Repairs & Rebuilds
Slipping, grinding, whining or won't select a gear? We diagnose the fault and repair or rebuild the gearbox properly, with all work guaranteed.
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Stocklock Lock-Up Kits
The Australian-made Stocklock torque-converter lock-up kit for towing 4WDs: up to 3 L/100km saved and far cooler transmission temps on the LandCruiser, Prado, Hilux and Fortuner. From $750 supply, $1,350 installed.
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Honest diagnosis before you spend a cent
Transmission work is where customers fear the biggest, most opaque bill, so this is exactly where we are different. We diagnose the real fault first and tell you straight whether it is a service-level fix (fluid, filter, solenoid) or a genuine repair or rebuild. We will not sell you a rebuild you do not need - that is the RAA fair-pricing promise in practice.
- RAA Approved Repairer. We are judged on knowledge, skills and equipment, and subject to regular RAA audits, held to a fair-pricing promise that we will not charge for work that was not done or not needed.
- We photograph the work and send you the images. You see what was actually wrong and what we did, so there is no taking it on faith.
- All work fully guaranteed. Our driveline work carries a 12 month or 20,000km warranty.
- Free loan carswhile your vehicle is with us, so a transmission job does not leave you stranded. A loan form and a current driver's licence apply - see our guarantees and loan-car terms.
- over 30 years of hands-on diesel and petrol experience across diesel and mechanical work in southern Adelaide, on every make and model.
302 Google reviews tell the same story, backed by our 100% Result Guarantee.
Save fuel and heat when you tow: the Stocklock lock-up kit
The Australian-made Stocklock torque-converter lock-up kit locks the converter mechanically so it stops slipping under tow load. The result is up to 3 L/100km better economy, much cooler transmission temperatures, and a longer-lasting box on heavy tow rigs. It is popular on the 200-Series LandCruiser, Prado, Fortuner and Hilux, and it is the upgrade serious tourers and caravanners fit alongside a tune.
Pricing is $850 supply, $1,450 installed. See the full Stocklock lock-up kits detail, or pair it with 4x4 diesel tuning - the lock-up plus a tow tune is the complete towing package.
Stocklock torque-converter lock-up kit, installed. Supply-only from $750. Confirm current pricing when you enquire.
Signs your transmission needs a look
Catch these early and it is often a service-level fix instead of a rebuild, which is exactly why a fluid-and-filter service is cheap insurance. If your vehicle is doing any of the following, bring it in:
- Slipping - revs climb but the vehicle does not pull, or it hesitates before engaging a gear.
- Shuddering or harsh, clunky shifts, especially under load or when towing.
- Whining, grinding or a transmission that will not select a gear (manual or auto).
- Burnt-smelling, dark or low transmission fluid, or a fluid leak on the driveway.
- A transmission warning light, or the box dropping into limp mode.
- Overheating when towing or climbing hills - the case the Stocklock kit is built for.
Booked in early, most of these point to a transmission service; left too long they become a job for gearbox repairs. Tell us what your box is doing on 08 8186 2005 and we will tell you which it is.
Transmission pricing and how to get started
We are honest about what can and cannot be priced up front. A transmission service is a fixed, affordable maintenance item, quoted on your vehicle, because autos and manuals differ. Repairs and rebuilds are quote-based by definition, because the price depends entirely on the fault, so we diagnose first and give you a firm figure before any work starts. Never a blind estimate.
The one fixed price worth stating up front is the Stocklock lock-up kit, from $850 supply and $1,450 installed. Free loan cars are included while your vehicle is with us, so the value is clear before you say yes.
Transmission service Adelaide FAQs
As a guide, every 40,000 to 60,000km or per your vehicle's handbook, sooner if you tow or work the vehicle hard. A fluid-and-filter service is cheap insurance against a far more expensive failure, and we will confirm the right interval for your vehicle.
Yes. We service, repair and rebuild both automatic and manual transmissions, on everyday cars, 4WDs and tow vehicles.
Not necessarily. Many slipping or shuddering faults are a fluid, filter or solenoid issue, not a worn box. We diagnose the actual cause first and tell you straight, so you don't pay for a rebuild you don't need.
A service is a fixed, affordable maintenance item. Repairs and rebuilds are quoted after diagnosis, because the price depends on the fault, so we always give you a firm figure before any work starts.
It is an Australian-made torque-converter lock-up kit that stops the converter slipping under tow load, saving up to 3 L/100km and running much cooler. Worth fitting if you tow heavy with a LandCruiser, Prado, Fortuner or Hilux. From $750 supply, $1,350 installed.
Yes. All our work is fully guaranteed, and we are an RAA Approved Repairer subject to regular audits. We also photograph the work and send you the images so you can see exactly what was done.
Still have a question? Call us on 08 8186 2005 or book your transmission in online.