Automatic transmissions, also known as gearboxes, are commonly found in modern vehicles for their convenience and ease of use. However, they can encounter problems that affect their performance and reliability. Here we will examine some of the most common gearbox problems you may come across, along with their possible causes and solutions.
How does an automatic transmission work?
An automatic transmission is a sophisticated mechanism in a car that shifts gears automatically, without the driver having to do so. This system operates by using a combination of hydraulics, electronics, and mechanical components. The transmission has several crucial components, including the torque converter, planetary gear sets, and hydraulic system. When the driver chooses a gear or switches from Park to Drive, hydraulic pressure is used to activate various clutches and belts inside the transmission. This allows for the transfer of power from the engine to the wheels.
The torque converter acts as a fluid coupling, transferring power from the engine to the transmission, even when the vehicle is at a standstill. As the vehicle accelerates, the transmission shifts gears automatically based on factors such as engine speed, vehicle speed, and throttle position. This allows the engine to work efficiently across a range of speeds and loads, providing smooth and seamless acceleration without the need for manual operation.
What are the signs of a faulty automatic gearbox?
Recognising the following signs is essential for the prompt diagnosis and resolution of problems that may occur in the vehicle’s systems to maintain performance and safety:
Delayed or slipping gears. A delay in gear engagement when shifting, or if the transmission unexpectedly slips out of gear, could indicate internal wear or damage. To solve this problem, we advise consulting a qualified mechanic or transmission specialist for a comprehensive diagnosis and repair. Depending on the extent of the damage, solutions can range from minor adjustments to more extensive repairs or even a transmission replacement.
Strange noises. Mechanical problems such as worn gears or bearings may be indicated by unusual noises such as squealing, grinding, or rattling from the transmission or gearbox. As is the case above, we advise you to consult a professional mechanic or specialist who may want to take a look at the transmission parts catalogue to find the part they need.
Fluid leaks. Any signs of transmission fluid leaks, such as puddles beneath the car could indicate a leak in the transmission system that needs to be addressed immediately. Locate the source of the leak, which may be from seals, gaskets or cooler lines and repair or replace the damaged parts as necessary to prevent further fluid loss. Make sure that the transmission oil for your car has been topped up to the correct level using the recommended type of transmission fluid.
High revs at speed: If the engine revs higher than usual at motorway speeds, this could indicate that the transmission is not shifting into higher gears, which could lead to higher fuel consumption and possible damage to the engine or transmission components.
Replacement parts
When it comes to replacing parts in your car, using parts designed specifically for your car model is often the best choice. For example, Ford transmission parts are designed to meet the manufacturer's specifications and standards, ensuring compatibility and optimum performance.
Manufacturer recommendations: Suffix A, MAN 339 Z1, MB 236.6, MB 236.2, Ford WSS-M2C186-A, MB 236.7, MB 236.1, MB 236.5, Ford WSS-M2C166-H, MAN 339 V1, Allison C4, Dexron II D, Ford WSS-M2C185-A, Ford WSS-M2C138-CJ, Allison C3
Observe service information
Packing Type: Canister
Transmission Type: for automatic transmission, Converter Automatic Transmission
Manufacturer recommendations: ATF plus 9, BMW L12108, VW G 060 162, ZF LIFEGUARDFLUID 8, BMW ATF 3+, Fiat 9.55550-AV5, Honda ATF Type 3.1, VW G 055 540
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