Water or refrigerant mixed with transmission fluid: Has the transmission been destroyed?

Silent killers of automatic gearboxes or transmissions are water or refrigerant mixes with Automatic Transmission (ATF). This problem was observed in older vehicles with neglected engine cooling systems, but later cars and trucks that followed the maintenance schedule became more and more common. The result is always the same: forwarding is completely reviewed or replaced

Polluted fluid can be cleansed before the injury occurs

Almost all automatic gearboxes on the road today use cellulose-based paper lined plates called clutches or frictions. These clutches act as brakes for moving and stopping various parts inside the gearbox. If you move the gearbox to drive or reverse, friction is applied.

The clutch plate guide is a very fine material that is bonded to a steel roller. Before the paper is glued to the disc, the strength and consistency of the graham cracker. When the material is tied, it becomes much stronger and can last for a very long period under normal operating conditions

The clutch material is hygroscopic. This means that when the clutches are exposed to moisture, the paper material displaces the ATF to the water. This moisture reaches the rusting steel plates and breaks the glue that binds the paper to the plate. A study by International Lubricants Inc. showing the effects of the waters exposed to the automatic transmission clutch: "The test showed that water below 600 mg / kg migrated to the friction surface of untreated paper and contributed to the loss of paper coating and defective torque transfer properties. "According to laymen, less than one tablespoon of water or engine coolant in the gearbox can cause an error

How did the water come from?

There are three ways to get water for transmission:


  1. Through the engine heater. From the 1950s to the present, most automatic drives are cooled by the same water-based system that protects the engine from overheating. There is a separate container in the cooling system for the transfer fluid that allows the coolant to escape heat from the ATF without mixing the two liquids. If there is a leak between the ATF and the coolant reservoirs of the refrigerator, the liquids are interlinked. For older vehicles, it was more common for refrigeration systems to be neglected, but some of today's new vehicles use materials that do not work due to pressure problems in the cooling system.
  2. Exposure to deep water. Through high puddles during rain storms or in road traffic the gearbox ventilation system can be emitted by humidity. The best chance of preventing error is to verify that ATF is water after this type of scenario in the vehicle
  3. . Most vehicles have a measuring rod where ATF is checked and added. The actuator can easily enter the gear unit when the rod is sprayed with water while the engine is being cleaned or in some cases the water from the rain or the car washes into the oil dipstick. GM's and Chrysler's traffic news cover some types of their vehicles. Qualified stores can access these types of newsletters. This problem is indicated by moisture or rust around the oil level tube.

To Replace or Rebuild?

This depends on how much water is mixed with the transfer fluid, how long the vehicle has been transported with the contaminated ATF and what type of gear is in your vehicle. Metal and electronic components inside the gearbox are quickly corroded by moisture. If damage to the inside of the gearbox is too large, the cost of replacing the trans will exceed the cost of replacing the equipment with a refillable product. Some manufacturers such as Nissan and Chevy have computers in the gearbox that are exposed to moisture. These computers or mechtronixes cost up to $ 2,000 and do not include re-training the rest of the unit. If spare parts are used, it is often a better decision to replace the gearbox completely.

Summing up things when water is being transferred, then there is no expensive fix. Flushing liquid will only make extra money and the inevitable failure may happen earlier. Regularly service the engine cooling system and ask your professional gear shipper if your car is frequent for this type of failure. If this happens, locate the radiator with an external oil cooler

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