Southern Adelaide's diesel and mechanical workshop
When you hand over the keys, you want a workshop in southern Adelaide you can trust to do the job properly, charge you fairly, and prove the work. That is what Trusted Mechanical is: a diesel-performance and mechanical workshop in Lonsdale, an RAA Approved Repairer with an in-house chassis dyno and 302 five-star reviews behind it.
We stand on two pillars. The first is a genuine diesel-performance house: custom diesel tuning written and verified on our own dyno, 4x4 towing and touring tuning, the legal DPF clean and diesel cleaning work, plus ECU=Shop modules for locked ECUs.
The second is a trustworthy local workshop. As an RAA Approved Repairer we deliver car servicing and repairs and log-book servicing that keeps your new-car warranty intact, with free loan cars and all work guaranteed. Trusted Mechanical Services has been established in 2013 and is backed by Travis's over 30 years of hands-on diesel and petrol experience, serving diesel mechanic Lonsdale and the wider south.
The character behind both is simple. We would rather keep you for years by doing the job properly and charging fairly than win once and lose your trust. We would rather keep your filter working and your vehicle legal than sell you a problem.
Meet Travis Dunn
Trusted Mechanical is owned and run by Travis Dunn. Travis holds multiple trade qualifications and brings over 30 years of hands-on diesel and petrol experienceto the bench, and he runs the dyno and oversees the tuning himself, so the expertise you are paying for is the owner's, not outsourced to someone you never meet.
He built the workshop the way an enthusiast wishes every workshop worked: straight-talking, enthusiast-to-enthusiast for the 4WD touring community, with the plain honesty an everyday motorist wants. Whether you are chasing more power for towing or just want a service done right, you deal with a technician who treats your vehicle the way he would treat his own.
Why Adelaide drivers trust Trusted Mechanical
- RAA Approved Repairer (Mechanical). Judged by RAA on knowledge, skills and equipment, audited regularly, and held to a fair-pricing promise: we will not charge for work that was not done or not needed, and you are treated with courtesy and respect.
- 4.8 stars across 302 Google reviews. The reputation that already dominates the diesel mechanic search on Maps. Read our 302 reviews.
- In-house chassis dyno. Tunes are written and load-verified live, not emailed-in generic carpark files. That is unusual for a workshop this size and the single biggest performance difference.
- 100% Result Guarantee and all work fully guaranteed, with stated warranties on tunes, services, brakes and driveline. See our guarantees and loan-car terms for the full detail.
- Authorised Uni-Chip and ECU=Shop dealer and tuner. A real, tested result even for ECU=Shop modules for locked-ECU vehicles that cannot be remapped.
How we work
We photograph your service
And send you the images, so you see exactly what was done and why, not a mystery invoice.
Honest diagnosis first
We tell you what actually needs doing, and what does not, in plain English, before any work starts.
Every make, every model
Light vehicles through to heavier diesel rigs. Common-rail utes and wagons are the core of what we tune.
Free loan cars
While your vehicle is in, so a day in the workshop is not a day off the road. Loan-form and licence terms apply.
High attention to detail
The work is done properly and verified, on the dyno for tunes, never rushed.
Drop us a line about your vehicle and we will tell you honestly what is worth doing. Loan-car and licence terms are on our guarantees and loan-car terms page.
What we do
An About page that dead-ends wastes your time. Here is the map into everything we do, money clusters first. The hubs carry the detail and the pricing.
Diesel Tuning Adelaide
In-house dyno, custom ECU remapping and 4x4 tuning.
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Diesel Cleaning Systems
DPF cleaning and diesel injector cleaning.
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Car Servicing Adelaide
Log-book servicing and everyday repairs.
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Transmission Adelaide
Transmission service, gearbox repairs and Stocklock kits.
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Brakes, Suspension & Air-Con
Brakes, 4x4 suspension and air conditioning.
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Canopies Adelaide
Colour-coded ute canopies, fitted properly.
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ECU=Shop Adelaide
Diesel modules for locked-ECU vehicles.
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Diesel Mechanic Adelaide
Southern Adelaide's diesel specialists.
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Looking for a diesel mechanic in Adelaide? That is our home turf.
About Trusted Mechanical: common questions
We are in Lonsdale, southern Adelaide, at 31 Aldenhoven Road, Lonsdale SA 5160. We are open Mon-Fri 8:30AM-5:00PM and closed weekends, an easy reach from Christies Beach, Hallett Cove, Reynella and Noarlunga.
Owner-operator Travis Dunn, who holds multiple trade qualifications and runs the workshop and its in-house chassis dyno. The diesel and tuning expertise is the owner's, hands-on and not outsourced.
Yes. We are an RAA Approved Repairer (Mechanical), judged on knowledge, skills and equipment and subject to regular RAA audits, with a fair-pricing promise that we will not charge for work that was not done or not needed.
Yes. We photograph your service and send you the images, so you can see exactly what was done and why. It is the proof of workmanship most workshops leave on the table.
Yes. Free loan cars are available while your vehicle is with us, so a day in the workshop is not a day off the road. A loan form and a current driver's licence apply. See our warranties and loan-car terms.
An in-house chassis dyno (tunes verified live, not emailed in), RAA approval, 302 five-star reviews, a photo of every job, and honest diagnosis that tells you what does and does not need doing.
Still have a question? Call us on 08 8186 2005 or book your vehicle in online. You can also email us at enquiries@trustedmechanical.com.au.