US Truck Tuning — RAM, Ford & Chev/GMC Diesel
Custom diesel tuning for American trucks at our Oxley and Warana workshops — RAM Cummins, Ford Power Stroke and Chevrolet & GMC Duramax. Switchable multi-map tunes, transmission tuning and real dyno-verified gains.
American diesel trucks respond brilliantly to a proper custom tune. We write the calibration specifically for your truck on our in-house dyno — never a generic off-the-shelf file — and load it as a switchable multi-map setup so you can run an economy map around town, a torque-biased towing map under load, and full power when you want it, all from a switch.
Because a big-power diesel is only as good as the gearbox behind it, we also tune the Allison (Duramax) and Aisin/68RFE (RAM) automatic transmissions — firmer, faster shifts, stronger torque-converter lock-up and smarter shift points that eliminate hunting, flaring and limp-mode under load. Engine and transmission tuned together is how a US truck tows properly.
American diesel engines we tune
Why choose Willy’s for your American truck
Performance Tuning
Switchable multi-map ECU tuning, written and dyno-verified in-house for your American diesel truck.
- Economy, towing, street & performance maps on a switch
- Custom-written on your factory ECU, dyno-verified
- Emissions hardware kept intact
Servicing & Repair
Full mechanical servicing and transmission tuning for RAM, Ford and Chev/GMC diesels.
- Allison & Aisin/68RFE transmission tuning
- Diagnostics, servicing & repairs
- Towing, touring & daily setups
See the gains for your truck
Indicative gains on a stock vehicle, measured on a dyno at the engine (crank) — wheel power reads lower (typically 15–20% on a 4WD). Actual results vary with vehicle condition, fuel quality and modifications.
Indicative rear-wheel (dyno) figures with switchable maps, emissions intact. Actual results vary with vehicle condition, fuel quality and modifications.
Why drivers trust Willy’s Workshop
US truck diesel FAQs
Do you tune Cummins, Power Stroke and Duramax?
What is a switchable multi-map tune?
Do you tune the transmission as well?
Will a tune help with towing?
Do I have to delete my emissions?
Book your American truck in
We tune and service across South-East Queensland — choose the workshop nearest you.
