Transmission service
dynamic fluid exchange
Why it matters
The fluid in an automatic transmission is not a lifetime fill. Over time it loses its lubricating and protective properties, degrades thermally, and metal particles and deposits from the natural wear of the clutches and mechatronics build up in it. That leads to worse shifting, overloading of the transmission and, in extreme cases, to an expensive repair or rebuild.
If your vehicle jerks or shudders when shifting, shifting is delayed or harsh, you feel the transmission slipping, or the fluid has not been changed for more than 60,000 km, a dynamic fluid exchange is advisable. To keep the transmission trouble free we recommend repeating the preventive fluid exchange every 60,000 km.
Unlike an ordinary (static) change, where only the fluid in the pan is drained and up to half of the old, worn fluid remains in the transmission and torque converter, a dynamic (machine) exchange replaces the fluid in the entire transmission system including the torque converter, cooler and hydraulic circuit with an efficiency of almost 100 %. At the same time the contaminants and metal particles that would otherwise damage the mechatronics are flushed out. After the service you should notice smoother and faster shifting, no more slipping or jerking, and a longer transmission life.
Preventive vehicle maintenance
Give your automatic transmission a regular fluid change and avoid unnecessary, costly repairs later on.
Request an appointmentWhen to act
Based on our experience, we recommend a dynamic fluid exchange in cases where:
Many manufacturers describe automatic transmission fluid as "lifetime", but in practice that is only a marketing label. The fluid wears thermally and loses its lubricating properties just like in any other mechanical system. Without regular changes, the clutches, mechatronics and torque converter wear faster.
Worn fluid loses the ability to lubricate and cool the friction surfaces of the clutches properly, which shows up as harsh, delayed or uneven gear changes — the so-called shudder effect.
Degraded fluid dissipates heat less effectively and loses viscosity, which increases friction and temperature in the system. Increased noise or vibration during shifting may indicate fluid contaminated with metal particles.
Products used
BG Quick Clean for Transmissions® (106)
Removes accumulated deposits from the valve body, filter screen and other components in automatic, CVT and wet dual-clutch transmissions (DCT and DSG), keeping them running efficiently.
BG ATC Plus® (310) Automatic Transmission Conditioner
A professional conditioner added to the new transmission fluid in torque converter automatic transmissions at every fluid change. It prevents deposits from forming, slows thermal degradation of the fluid, improves its oxidation stability, and both eliminates and prevents shudder during shifting. It also keeps seals supple, reducing the risk of leaks.
BG CVT Plus® (303) Continuously Variable Transmission Conditioner
A specialised conditioner designed specifically for continuously variable and DSG/DCT transmissions. It improves the properties of both new and used fluid in continuously variable transmissions (CVT) — belt and chain type — in wet dual-clutch transmissions (DCT) and in direct-shift transmissions (DSG). It extends fluid life, prevents deposits and improves resistance to oxidation and wear.
Equipment
The dynamic exchange is done with the Launch CAT-501 S unit. It comes with adapters that connect it to the particular type of transmission — without the right adapter the unit cannot be connected to the vehicle.
The dynamic fluid exchange unit. It draws off the old fluid and adds new fluid at the same time, at a ratio that prevents the two from mixing, and shows the progress on its display.
Adapters that connect the unit to the transmission cooler circuit. Which one is used depends on the type of transmission in the vehicle.
Pressure hoses between the unit and the transmission circuit, through which the fluid flows during the whole service.
We have four ATF adapter sets. They cover these makes — if yours is not on the list, get in touch and we will look the adapter up.
AISIN, AUDI, CITROËN, DODGE JOURNEY, FIAT, OPEL, PEUGEOT, RENAULT, SEAT, ŠKODA, VW
ALFA ROMEO, AUDI, FIAT, FORD, HUMMER, HYUNDAI, JAGUAR, LAND ROVER, MERCEDES, NISSAN, OPEL, SAAB, TOYOTA, VOLVO, VW
AISIN, AUDI, CHRYSLER, FORD, GM, HONDA, LEXUS, MERCEDES-BENZ, MITSUBISHI, NISSAN, PORSCHE, TOYOTA, VW
AUDI A6, AUDI Q5, AUDI S-tronic, AUDI 4G, ŠKODA, VW
How it works
The dynamic fluid exchange service keeps your transmission in perfect condition for as long as possible.
Initial diagnostics of the transmission control unit.
Test drive with cold fluid in the transmission.
The engine and transmission are brought up to operating temperature.
Test drive with warmed-up fluid.
The professional Launch 501S dynamic fluid exchange unit is connected to the transmission cooler circuit using adapters.
BG Quick Clean for Transmissions is added to the old, warmed-up fluid using the Launch 501S unit.
BG Quick Clean for Transmissions is left in the transmission for 10 minutes, during which the P, R, N, D positions are selected every 5 seconds.
The old fluid is drained from the transmission.
The transmission filter is replaced, along with the pan cover and gasket where necessary.
The prescribed quantity of new fluid is filled in.
The exchange process starts — the unit simultaneously draws off the old fluid and adds new fluid prescribed by the vehicle manufacturer, at a ratio that prevents the two from mixing.
Approximately 1.5 to 2 times the transmission fill volume is used to flush the system thoroughly, including the torque converter and cooler.
BG ATC Plus conditioner is added to the new fluid for torque converter transmissions, or BG CVT Plus for CVT/DSG/DCT transmissions.
The correct fluid level is checked and set according to the temperature prescribed by the manufacturer.
The adaptation values in the transmission control unit are reset and a test drive is made to check shifting smoothness.
Pricing
Pricing valid from 1 August 2026
| Service option | What's included | Price |
|---|---|---|
| Torque converter automatic transmission (AT) |
Dynamic machine-flush fluid exchange in a torque converter automatic transmission. The price includes all work related to the dynamic fluid exchange, including BG Quick Clean for Transmissions and the BG ATC Plus conditioner. Transmission fluid is not included in the price. The final price will be confirmed on the basis of the exact vehicle specification.
|
320 €incl. VAT |
| Dual-clutch transmission (DSG / S-tronic / PDK and similar) |
Dynamic machine-flush fluid exchange in a dual-clutch transmission including filter replacement. The price includes all work related to the dynamic fluid exchange, including BG Quick Clean for Transmissions and the BG CVT Plus conditioner. Transmission fluid and the oil filter are not included in the price. The final price will be confirmed on the basis of the exact vehicle specification.
|
320 €incl. VAT |
| Continuously variable transmission (CVT) |
Dynamic machine-flush fluid exchange in a CVT transmission including filter replacement. The price includes all work related to the dynamic fluid exchange, including BG Quick Clean for Transmissions and the BG CVT Plus conditioner. Transmission fluid and the oil filter (where it can be replaced) are not included in the price. The final price will be confirmed on the basis of the exact vehicle specification.
|
280 €incl. VAT |
Request an appointment No obligation — we'll get back to you with the earliest available slot for your vehicle.
More services
IsaTrade Automotive Group
A service job can be combined with the underbody treatment, so you only leave the vehicle with us once.
Two-stage rust protection of the underbody and body cavities using DINITROL products.
osetreniepodvozku.sk
Engine control unit software tuning for higher output and lower fuel consumption.
optimalizaciavykonumotora.sk
At the Bratislava centre you can buy BG products for preventive protection of the engine and fuel system.
bgprodukty.skBG service centres
Tell us which BG service you're interested in and we'll send you the earliest available appointment for your vehicle.
