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Transmission fluid performance: CVTs rely heavily on transmission fluid for both lubrication and hydraulic pressure. When the fluid is cold, it's more viscous (thicker), which can affect how the transmission operates — e.g., causing sluggish acceleration or unusual shifting behavior.
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Material expansion and tolerances: Like all mechanical systems, the components inside a CVT (belts, pulleys, valves, etc.) are designed to operate within certain temperature ranges. Letting the vehicle idle briefly (30–60 seconds) allows these components to begin reaching optimal operating temperature.
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Preventing long-term wear: Driving hard before the CVT has reached its operating temperature can increase wear over time, especially in extreme climates.
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Modern cars: Just start the engine, wait 30 seconds, and then drive gently for the first few minutes. Avoid hard acceleration or high RPMs until the engine and transmission warm up.
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In cold climates: You might idle a little longer (1–2 minutes max), or use remote start if available.
