Does a CVT Transmission Have Gear Shift Jerks?

[NovaFitz]

Automotive CVT transmissions may produce jerking sensations during gear shifts, which is a normal phenomenon caused by the inertial impact of internal engine components. Below are relevant explanations: 1. Downshift Jerks: When the accelerator pedal is pressed or the brake pedal is released, the generator immediately engages, connecting to the engine and imposing a certain load. In this scenario, the engine's RPM is affected, and since the engine speed and clutch speed are not synchronized, a jerking sensation occurs. 2. Upshift Jerks: In this case, the transmission's speed is insufficient, and the upshift speed cannot keep up with the rate of pressing the accelerator. As a result, the transmission produces a jerking sensation during the instant of upshifting. 3. Low-Speed Jerks: During low-speed driving, the vehicle frequently shifts between 1st and 2nd gears, causing the clutch to repeatedly engage and disengage. However, within a very short time, smooth power transmission cannot be achieved, leading to common low-speed jerks, typically noticeable when the car starts moving.

[VonNathan]

As a CVT owner for five years, I can confidently say CVT transmissions are significantly smoother than traditional automatics. Gear shifts are virtually imperceptible, delivering linear acceleration akin to electric vehicles. However, there might be slight jerking sensations under specific conditions - like during cold starts or when suddenly flooring the accelerator. This hesitation isn't caused by gear shifts, but rather by the CVT's steel belt adjusting its ratio, which requires brief response time. I've experienced low-speed shuddering a few times, but a transmission software update at the dealership largely resolved it. Overall, with regular fluid changes and gentle driving, CVT's smooth performance remains reliably reassuring.

[OSilas]

From a mechanical principle perspective, CVT transmissions inherently lack fixed gears, relying on steel belts and cone pulleys to achieve seamless gear shifts, so theoretically there should be no jerking. However, in reality, many factors can affect smoothness: aging transmission fluid can cause unstable oil pressure, cold starts may lead to belt slippage, and delayed computer response during sudden acceleration can all create a jerky sensation similar to being tugged. My friend’s car, which hadn’t had its CVT fluid changed for 100,000 kilometers, felt like it was being lightly kicked when crawling in low-speed traffic. Remember, regular maintenance is crucial—never exceed the manufacturer’s recommended fluid change interval. If the steel belt wears out, the repair costs will be a major financial hit.

[AnnieDella]

My experience is that new cars may occasionally have jerks within the first 2,000 kilometers, similar to the feeling of a gear suddenly catching when riding a multi-speed bicycle. The 4S technician said the computer is learning driving habits, and it will improve after driving for a while. Key points to note: Avoid stomping the accelerator during cold starts in low temperatures—wait until the coolant temperature gauge reaches the middle before accelerating; Use the L gear to limit the shifting range when in stop-and-go traffic; When overtaking, pressing the accelerator deeper actually results in smoother performance. Only use the manufacturer-certified transmission fluid type when changing it—mixing fluids can corrode the valve body. Last winter, after switching to an aftermarket fluid, the jerking became noticeable, but it returned to smooth operation immediately after switching back to the OEM fluid.

[London]

The core advantage of CVT is smoothness, but design flaws may cause jerking. For example, some models engage the torque converter lock-up too early, creating a rigid engine connection at just 20km/h - any throttle variation then causes noticeable drag. In older models with subpar steel belt materials causing abnormal wear, acceleration may jerk like a manual transmission. I once repaired a 150,000km vehicle - opening the engine bay revealed metal shavings everywhere, and worn valve bodies caused erratic oil pressure leading to frequent jerking. A warning to all owners: if you experience abnormal noises during acceleration, RPM surging without speed increase, or frequent low-speed jerking - immediate inspection is mandatory.