can a car run without a torque converter

[MacAxel]

Yes, a car can absolutely run without a torque converter. Many vehicles on the road today use different types of transmissions that don't require this component. The primary function of a torque converter, which is a type of fluid coupling found in traditional automatic transmissions, is to transfer engine power to the transmission while allowing the car to come to a complete stop without stalling. Its absence doesn't prevent a car from operating; it just means the vehicle uses an alternative method for managing power transfer.

The most common example is a manual transmission, which uses a mechanical clutch instead of a torque converter. The driver manually engages and disengages the clutch to connect the engine to the transmission. Other modern alternatives include:

• Automated Manual Transmissions (AMTs) / Dual-Clutch Transmissions (DCTs): These function like a manual transmission but use electronically controlled clutches to shift gears automatically, eliminating the need for a torque converter.
• Continuously Variable Transmissions (CVTs): Many CVT designs use a different coupling system, such as a hydraulic torque converter only for initial launch (which some high-end models are moving away from) or a specially designed clutch pack, especially in hybrids.

Each system has distinct characteristics affecting driving feel, fuel efficiency, and cost. The table below compares how different transmissions manage power transfer without a traditional torque converter.

Transmission Type	Power Transfer Mechanism	Key Characteristics
Manual Transmission	Mechanical Friction Clutch	Direct driver control, often higher fuel efficiency, lower initial cost.
Dual-Clutch (DCT)	Dual Electronically Controlled Wet or Dry Clutches	Extremely fast shifts, sporty feel, can be less smooth at low speeds.
Automated Manual (AMT)	Single Electronically Actuated Clutch	Cost-effective automation, can exhibit jerky shifts compared to other automatics.
CVT (Belt/Chain-type)	Variable Pulley System or Launch Gear/Clutch	Seamless acceleration, optimized for fuel economy, can have a "rubber-band" feel.
Electric Vehicle (EV) "Transmission"	Direct Drive (Single-Speed Gear Reduction)	Instant torque, no need for a multi-speed transmission or converter.

Ultimately, the choice depends on your driving preferences. If you prefer a direct, engaging connection to the car, a manual or DCT might be best. For maximum smoothness and efficiency, a well-designed CVT or an electric vehicle is the way to go.

[BrynleeFitz]

Sure can. My old pickup truck has a manual transmission—no torque converter in sight. You’ve got a third pedal, the clutch, that you press down to change gears. It’s a direct mechanical link. It’s a bit more work, but you feel more in control. That’s the trade-off. Newer automatics, especially the sporty ones with dual-clutch gearboxes, also skip the torque converter for faster shifts.

[DelGia]

Absolutely. The torque converter is specific to a conventional automatic transmission. Many hybrids and electric vehicles don't use them at all. My hybrid uses a special electronic continuously variable transmission (e-CVT) that relies on a planetary gear set, making a torque converter unnecessary. Electric vehicles have a single-speed gear reduction, so there's no need for the torque multiplication or slip that a converter provides. The technology has simply evolved beyond it.

[Palacios]

From a technical standpoint, yes, a car runs perfectly fine without one. The torque converter's job is to allow slippage so the engine doesn't stall when the vehicle is stopped. Other systems achieve this differently. A manual transmission uses a clutch disc that the driver controls. A dual-clutch transmission uses pre-engaged clutches that grab the next gear. Each method has pros and cons for durability, cost, and driving feel, but they all accomplish the same fundamental goal of connecting a running engine to the wheels.