Short Answer
Complete Explanation
eTorque is a mild hybrid technology developed by Ram Trucks (a division of Stellantis, formerly FCA) that enhances the performance and efficiency of certain Ram 1500, Ram 2500, and Ram 3500 pickup trucks. The system uses a belt-driven motor-generator unit (MGU) connected to a 48-volt lithium-ion battery pack, providing electric assist during acceleration, regenerative braking, and smoother engine start-stop operations.
- Motor-Generator Unit (MGU):
The MGU replaces the traditional alternator. It can act as a generator to recharge the battery or as a motor to add up to 90 lb-ft of torque (on HEMI V8 models) during launch and low-speed driving. This reduces the load on the engine and improves fuel efficiency. - 48-Volt Battery Pack:
A small lithium-ion battery (about 0.43 kWh) stores energy captured through regenerative braking. The higher voltage (48V vs. typical 12V) allows more efficient power delivery and supports the MGU’s electric assist. - Start-Stop Enhancement:
eTorque enables seamless engine shut-off at stops and near-instant restart. The system can restart the engine in under 0.4 seconds, and the electric assist provides initial torque before the engine fully engages, eliminating the hesitation common in conventional start-stop systems. - Torque Addition:
The electric boost fills the torque gap at low RPMs (e.g., 0–1,500 rpm), giving the truck a stronger feel off the line without increasing fuel consumption. This is particularly beneficial for towing and hauling. - Fuel Economy Improvement:
Depending on driving conditions and model, eTorque can improve fuel economy by approximately 1–2 mpg combined, with greater gains in city driving where stop-start and regenerative braking are most active.
History / Background
Ram introduced eTorque as part of the 2019 Ram 1500 refresh, marking the brand’s first use of a mild hybrid system in a full-size pickup truck. The technology was developed in response to tightening U.S. Corporate Average Fuel Economy (CAFE) standards and the growing demand for better efficiency without sacrificing truck capability. Initially available on the 3.6L Pentastar V6 and 5.7L HEMI V8 engines, eTorque gradually expanded to heavy-duty Ram 2500 and 3500 models with the 6.4L HEMI V8 in the 2020 model year. The system builds on earlier mild hybrid experiments by FCA (e.g., Chrysler’s eTorque in some 2013 minivans) but was significantly refined for truck applications.
Importance and Impact
eTorque represents a pragmatic step toward electrification in the pickup truck segment, where full hybrid and electric powertrains have been slow to gain traction due to cost, towing capacity, and range concerns. By adding a small electric assist without requiring plug-in charging, Ram offers a cost-effective way to improve fuel efficiency (up to 20% better city mileage on V6 models) while maintaining traditional truck attributes. The system also contributes to reduced emissions, helping Ram meet regulatory targets. Its success influenced competitors like Ford (with its 3.5L PowerBoost full hybrid) and GM (eAssist) to pursue mild hybrid solutions, though eTorque remains one of the most widely deployed mild hybrid systems in pickup trucks.
Why It Matters
For consumers, eTorque offers tangible benefits: lower fuel costs (especially for those who do a lot of city driving or stop-and-go traffic), smoother driving characteristics (no start-stop shudder), and extra low-end torque for towing and hauling. For fleet operators, the modest fuel savings can translate into significant annual savings. Additionally, eTorque requires no special maintenance (the battery is sealed and liquid-cooled, similar to a standard 12V battery), and the system is covered under Ram’s factory warranty. Understanding eTorque helps buyers decide whether to opt for the mild hybrid on their next Ram truck versus a conventional powertrain or a full hybrid/EV option.
Common Misconceptions
eTorque is a full hybrid (like a Toyota Prius) and can drive the wheels solely on electric power.
eTorque is a mild hybrid. The electric motor cannot propel the vehicle by itself; it only assists the internal combustion engine during acceleration and restart. The truck always runs on the gasoline engine.
eTorque requires plugging in to charge.
No. The 48-volt battery is recharged automatically through regenerative braking and engine-driven generation. There is no plug-in capability.
eTorque significantly increases towing capacity.
While eTorque adds low-end torque, the maximum towing capacity of eTorque-equipped models is generally the same as non-eTorque counterparts. The system primarily improves drivability and fuel economy, not peak towing rating.
eTorque batteries need to be replaced frequently like hybrid batteries.
The lithium-ion battery pack is designed to last the life of the vehicle (typically 10+ years) and is covered by an 8-year/100,000-mile warranty (or longer in some states). Replacement is rare and expensive, but not routine.
FAQ
Is eTorque standard on all Ram trucks?
No. eTorque is available as an option on certain engine configurations (3.6L V6 and 5.7L HEMI V8 on Ram 1500, and 6.4L HEMI V8 on Ram 2500/3500). It is not standard on base trims and not offered on all engines.
Does eTorque affect towing capacity?
Generally no. Maximum towing capacity is unchanged between eTorque and non-eTorque versions of the same engine and configuration. However, the electric torque boost can improve low-speed drivability when towing.
How long does the eTorque battery last?
Ram states the battery is designed to last the life of the vehicle. It comes with an 8-year/100,000-mile warranty (subject to local regulations). Actual lifespan depends on climate, usage, and maintenance.
Can I add eTorque to an older Ram truck?
No. eTorque is an integrated system designed and installed at the factory. Retrofitting is not possible due to extensive electrical, mechanical, and software changes.
What happens if the eTorque system fails?
If the system detects a fault, the truck will operate normally using only the internal combustion engine (like a conventional non-hybrid truck). The check engine light may illuminate, and the start-stop feature may be disabled. Repairs should be performed by an authorized Ram dealer.
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