Signs a tune (or a hardware fix) might help
- The transmission constantly hunts between gears while towing on hills
- Throttle response feels dull or delayed low in the rev range
- Fitting larger tyres has thrown off the speedometer and shift points
- Temperatures climb quickly on long grades under load
What tuning can realistically deliver
- Improved throttle response and reduced gear hunting under load
- Better mid-range torque where towing actually happens
- Transmission shift calibration matched to the engine tune
- Tyre size and axle ratio corrections after a wheel or diff change
- Speedometer correction after larger tyres are fitted
Tuning considerations by brand
RAM Cummins
6.7 Cummins engines respond well to conservative towing-focused tunes that improve low-rpm torque and reduce transmission gear hunting, without pushing EGT and boost beyond what the factory cooling system can handle reliably.
Silverado & GMC Duramax
Duramax tuning in Australia should always keep emissions equipment intact and functioning — we focus on shift calibration and throttle mapping rather than large power claims that stress factory driveline components.
Ford Power Stroke
Power Stroke tuning follows the same principle — meaningful towing improvement comes from calibration and cooling, not headline horsepower figures that the factory cooling package was never designed to sustain.
What we won't do
We don't fit or support emissions-defeat devices, DPF delete or AdBlue delete. They are illegal for road use in Australia, they make the truck unsellable to any informed buyer, and they routinely cause more expensive engine problems than they solve. If your DPF or emissions system has a fault, the fix is to repair it properly.
Supporting hardware
A tune is only as good as the hardware underneath it. For trucks that tow hard we look at transmission and engine oil cooling, intake and intercooler condition, exhaust restriction, fuel system health and tyre choice before touching calibration — cooling capacity is usually the real limit on a hot Queensland climb, not power.
Process and cost
- 1Baseline scan, fault code check and a discussion of what you actually want the truck to do better.
- 2Inspect supporting hardware — cooling, intake, exhaust, tyres — and recommend fixes first if that's the real bottleneck.
- 3Apply and road test a calibration matched to your driving — towing, touring or daily use.
- 4Recheck fault codes and transmission adaptive behaviour after the tune.
Tuning is quoted on enquiry because the right approach differs enormously between a lightly loaded daily driver and a truck that tows a heavy van every second weekend — we won't quote a number until we understand your goals and the hardware involved.
Frequently asked questions
- Will tuning improve fuel economy?
- Sometimes, modestly, when the truck spends its life towing and the calibration reduces gear hunting. Treat any large economy claim with suspicion.
- Do you tune deleted trucks?
- No. We don't perform or support emissions deletes; we repair emissions systems so the truck stays road legal.
- How much does tuning cost for a RAM Cummins or Duramax?
- It depends on the calibration chosen and whether supporting hardware needs attention first, so it's quoted on enquiry once we understand your truck and towing needs.
- Is tuning legal in Queensland?
- Legal tuning that keeps emissions equipment functioning and doesn't affect ADR compliance is fine. Tunes that delete or bypass emissions systems are illegal for road use and are not something we offer.
- Will a tune void my warranty?
- A manufacturer can decline warranty on a component a tune caused to fail, and some tunes are detectable even after reverting. We're upfront about this risk before recommending anything on a truck still under warranty.
- Can tuning fix transmission gear hunting while towing?
- Often yes, when the hunting is caused by a mismatch between throttle mapping and shift points under load. A recalibration matched to towing conditions frequently solves this without any hardware changes.
- Does fitting bigger tyres require a tune?
- Larger tyres change your effective gearing and can throw off the speedometer and shift points. A tuning correction restores accurate speed reading and appropriate shift behaviour for the new tyre size.