Fluid change in automatic transmission

We offer an oil change in automatic transmissions in 2 methods:

– Static method

Static fluid change consists of draining the oil from the box with a drain plug or an oil sump. When there is no drain plug,

remove the oil filter (if it is under the oil sump) and wait some time for a free oil leak. This procedure does not ensure

replacement of the entire volume of oil used. Typically, the exchange is subject to a maximum of 60% of the total oil in the

system. In case of excessive oil consumption, after starting the engine, when the oil pump of the box starts to work, the old

oil mixes with the new oil, which causes a slight improvement of the oil’s properties.

– Dynamic method

Dynamic fluid change in the automatic transmission consists in replacing the entire volume of oil used in the system. The oil

is removed from the converter, control valve assembly, actuators, conduits, ducts, pump, radiator and bowl. The dynamic

exchange is performed with a specially designed device. After connecting the device to the oil fill and oil return port from the

cooler, we perform:

– rinsing the entire system with a cleaning agent with a small amount of fresh oil,

– removing the old oil together with the cleaning agent, while introducing fresh oil, as a result of which we consume approx.

2-4 liters more than for static method

We buy damaged transfer cases and actuators

We buy transfer cases:
BMW x-Drive

ATC 35L, ATC 300, ATC 350
ATC45L, ATC 400, ATC 450
ATC 500
ATC 700

Mercedes 4Matic:

W164, W166 ( without Off Road Package)

We buy actuators of transfer cases BMW x-Drive

ATC 300
ATC 400
ATC 500
ATC 700

Regeneration of xDrive transfer cases

xDrive why are they spoiling? Common symptoms and causes of damage.

Thanks to the BMW xDrive all-wheel drive system, each axle uses its traction to the maximum. Your BMW

ensures stable cornering. If it is necessary to transfer more force to the road – especially during difficult

driving conditions – the Dynamic Stability Control System (DSC) enters the action. In addition to improving

traction, the system also recognizes the first signs of over- and understeer. In a fraction of a second, it

transfers up to 100% of the engine’s power to the front or rear axle via the gearbox and the electronically

controlled multi-disc clutch, then returns to the standard 40:60 ratio. Thanks to this technology, the four-

wheel drive system has all the benefits of rear-wheel drive. Provides precise handling, optimum cornering

and a clear separation between the engine and the steering.

Causes of damage to the transfer case

In addition to the above-mentioned benefits, the xDrive system sooner or later begins to fail. The VTG

switchbox (reducer) corresponds to the incorrect operation of the 4 × 4 drive system, but why it breaks

down? The answer is simple – because it is to be broken, the limit of strength of such a chest usually does

not exceed 200,000 km. Damage can take place much earlier, for ex. thanks to the inappropriate choice of

tires, as well as oil, insufficient quantity, or lack thereof. At this point it is worth noting that oil should be

changed every 50-60 thousand km in the distribution box. When deciding on a BMW xDrive, always install 4

tires from the same manufacturer. Tires of the same tread height are best according to manufacturer’s

recommendations. Incorrectly matched tires or unevenly worn between the front and rear axles by up to 2

mm! They will cause jerking which directly affects the reduction of the regulator.

It should be remembered that the transfer case is only switched on during the drive. If you feel jerking when

you release the gas – “holding” the car, the box may not have been damaged and it is the fault of tires only. In

the case when “jerking” occurs while driving, i.e. adding gas, starting, turning, driving at the roundabout, etc.

This is an obvious defect of the reducer provided that other mechanical defects are ruled out.

Another typical symptom of a damaged box is a “howl” caused by damage to the clutch basket bearings. The

most common defect is the 4 × 4 lights, abs, the handbrake. In most cases, they indicate damage to the

gearbox actuator (mechanical or electrical damage). We know from experience that the regeneration of the

actuator usually helps for a short time, which results in refurbishment of the distribution box.

4Matic signs of a damaged transfer case.

4MATIC – all-wheel drive on Mercedes-Benz vehicles. The construction of the drive depends on the generation, but it mainly consists in “attaching” the central differential to the existing automatic boxes and connecting it with a separate shaft to the front and rear differential. The name comes from 4 (-wheel-drive) and (auto) matic. Our company deals in the regeneration of second and third generation  transfer cases marked with the code name W164 and W166. Typical symptoms of a damaged distribution box include:  interrupting, the feeling of “skipping” (chain) when adding gas, rapid acceleration (caused by the pulled out chain and broken guides most often with a piece of housing) – howls, noise emanating from the central part of the chassis (caused by worn out bearings, lack of oil).