Ram TRX tune. Nashville.
The TRX shares the supercharged 6.2 Hemi with the Hellcat family. PCM unlock + Stage 1 map gets you 800+ rear wheel hp on stock pulley. Tow-rated, off-road-rated, drag-strip-rated. We've tuned TRX customers doing all three.
Every Carma tune includes.
Real prices, no dyno-number runaround. Here's what comes with every flash — at no extra charge.
What we do for the trx.
Stage 1 includes the PCM unlock, custom map, flashed same-day. The TRX shares the Hellcat playbook — pulley + bolt-ons + flex-fuel + methanol territory unlocks the platform's real ceiling. We've mapped TRX builds doing 1000+ wheel hp with the right supporting mods.
The TRX's 702 hp Hemi is deliberately detuned from Hellcat spec — softer spark and boost targets to survive a truck duty cycle — which is exactly why Stage 1 wakes it up so hard. We restore the aggression the Hellcat cars run, adapted for 35-inch tires, off-road airflow, and real payloads. The 8HP95's shift calibration gets firmed up for the truck's weight while tow behavior stays factory-clean.
- PCM unlock included (one-time, persists for life of the vehicle)
- Custom-mapped for your exact pulley / mod combination
- Safe map flashed and road-tested in-house
- E85 / flex-fuel mapping standard on Stage 2 builds
- Lifetime support on revisions
Pricing for the ram trx.
Mods we pair with this tune.
TRX builds skew practical — the mods that matter deal with heat, fuel, and the physics of a 6,900 lb truck.
- Cold-air intake — the hood scoop feeds it well; an open intake is worth real power on this platform.
- Pulley + injectors — the Hellcat formula applies — 800+ wheel trucks on flex fuel are routine.
- Flex-fuel kit — big spark on ethanol, pump 93 when you’re towing. One map handles both.
- Catch can — boost plus truck duty cycle means crankcase vapor. Keep the intercooler clean.
- 35"+ tire recalibration — speedometer, shift points, and ABS math corrected in the same flash.
No dyno-number games, no hard sell. Drive it, and if the tune isn't for you, we revert to stock at no charge. That's how confident we are in the map.
Common questions.
Will tuning hurt my tow rating?
The tune itself doesn't affect tow rating. We can map a separate tow-friendly fuel/timing profile alongside the performance one if you want both.
How does the TRX tune differ from a Trackhawk?
Same engine + PCM family. Calibration is different per vehicle (transmission programming, fuel maps, axle ratios) but the playbook is identical.
Does the 8HP95 transmission handle more power?
Yes — handles 800+ wheel hp without issue. Past 1000 wheel hp you may want a TCM tune in addition.
How long does the TRX appointment take?
Stage 1 with PCM unlock: 3 hours. Stage 2 with pulley install: full day.
I’m running 35s or 37s — does the tune handle that?
Yes — tire-size recalibration rides along in the same flash: speedometer, odometer, shift scheduling, and traction math all corrected. It’s the most-requested TRX add-on we do.
Does off-road use change the map?
Dust and heat do. We run IAT-referenced spark so slow technical work in a Tennessee summer doesn’t invite knock, and the truck wakes back up the moment airflow returns. Dedicated desert-runner duty cycles get scoped individually.
Will the tune mess with tow/haul, cruise, or 4WD modes?
No — every factory mode stays intact. The tune lives inside the stock control logic: launch control, tow/haul, and 4-Low behave exactly as before, just with more torque behind them.
Book your Ram TRX tune.
Drop it off in the morning, drive it home tuned by end of day. 1035 3rd Ave S, Nashville, TN 37210 · Mon–Fri 8 to 5.