Does a Dry Dual-Clutch Transmission Need Transmission Fluid Replacement?

[WestonFitz]

Dry dual-clutch transmissions do require transmission fluid replacement. Dual-clutch transmissions are a common type of automatic transmission, and it is generally recommended to replace the transmission fluid every two years or approximately 40,000 kilometers. Dual-clutch transmissions come in wet and dry types. In wet dual-clutch transmissions, the clutch plates are immersed in transmission fluid, whereas dry dual-clutch transmissions have clutch plates that are not submerged in transmission fluid. The replacement intervals vary for different vehicle models. Below are the recommended transmission fluid replacement cycles: Manual Transmission: Manual transmission fluid is typically recommended for replacement every three years or approximately 100,000 kilometers. Automatic Transmission: Automatic transmission fluid is generally recommended for replacement every two years or approximately 40,000 kilometers. Continuously Variable Transmission (CVT): CVT fluid is usually recommended for replacement every two years or approximately 60,000 kilometers.

[JamesonLynn]

I've driven for fifteen years and gone through three Volkswagens - the DSG transmission fluid issue really needs clarification. While the gear oil is indeed lifetime-fill, the hydraulic fluid MUST be changed on schedule! My previous Golf 7 suffered from this - skipped the 60,000km valve body fluid change and the gear shifts became as jerky as horseback riding. Check page 76 of your manual - most VW DQ200 units require hydraulic fluid changes every 60,000km. Dealers charge over 800 yuan, while specialist shops do it for 500. Never believe those who say DSG fluids don't need maintenance - degraded hydraulic fluid will cripple the shifting mechanism, and repairs easily cost 10,000 yuan.

[VanJoshua]

From a transmission engineer's perspective, this is quite straightforward. Dry dual-clutch systems have two independent oil circuits: the gear oil is permanently sealed and maintenance-free, while the hydraulic control unit requires regular oil changes. It's like holding a teacup (gear set) in your left hand that never needs refilling, while operating machinery (hydraulic valves) with your right hand requires periodic hydraulic fluid top-ups. Volkswagen's valve body oil must meet TL-VW521 specifications - using incorrect oil immediately causes gearshift hesitation. Test data shows that skipping the 70,000 km oil change increases solenoid valve wear by 300%. Our lab always says this is a classic case of being penny-wise and pound-foolish, strongly recommending mandatory changes at 60,000 km.