The Most Neglected Fluid in Your Car (Hint: It's NOT Oil)

July 9, 2024

Think you're all set after an oil change? Think again. While we all know the importance of regular oil changes, there's another fluid in your car that often gets overlooked and neglecting it could lead to costly repairs.


Preventative maintenance is key to avoiding these issues and saving you thousands down the line, so don't let low fluid levels ruin your ride. Today, we're shining a spotlight on the most neglected fluid in your car and how to keep it in tip-top shape. 


The most commonly overlooked fluid in a car (besides oil) is transmission fluid. This vital fluid lubricates and cools the transmission, which is responsible for transferring power from the engine to the wheels. If your car is shifting roughly, your steering wheel feels stiff, or your brakes feel spongy, it could be a sign that your transmission fluid is low or dirty. Neglecting this fluid can lead to gear slippage, rough shifting, overheating, and ultimately, transmission failure – a repair that can put a serious dent in your wallet. 


It's crucial to follow your owner's manual for recommended service intervals, which typically range from 30,000 to 100,000 miles depending on the type of transmission and fluid it takes. 


But transmission fluid isn't the only fluid that needs attention. Power steering fluid, brake fluid, and coolant/antifreeze are all essential for your car's performance and longevity. 


  • Power steering fluid: Makes steering easier and can become contaminated or low, leading to difficulty steering and potential damage to the power steering pump. 
  • Brake fluid: Absorbs moisture over time, which can compromise your brakes' ability to function properly and should be flushed every 2-3 years.
  • Coolant/antifreeze: Prevents the engine from overheating or freezing and should be flushed every 30,000-50,000 miles. 


Always consult your owner's manual for specific recommendations on fluid types and maintenance intervals for your vehicle. The team at Avid Autocare can give you more information on specific maintenance guidelines for your vehicle, and our courtesy inspection with any service can give you deeper insights into your vehicle's health and how to keep it properly maintained for years to come. Ready to give your car the care it deserves?


Contact us for a comprehensive fluid check and preventative maintenance plan. 

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Transmission problems have a reputation for being expensive, which is one reason drivers sometimes avoid dealing with the early symptoms. The problem with that strategy is that transmission concerns rarely improve by themselves. A small leak, abnormal shift, fluid problem, electrical fault, or worn component can become a much larger issue when it is ignored. Your transmission is responsible for transferring engine power to the wheels while keeping the engine operating within an effective range. Modern transmissions are also highly computerized, which means a shifting problem can involve mechanical components, hydraulic pressure, fluid condition, sensors, control modules, or a combination of systems. That is why accurate diagnosis is important before assuming the transmission itself has failed. Pay Attention to Changes in the Way the Car Shifts One of the most common signs of trouble is a noticeable change in shifting behavior. You may feel the vehicle hesitate before moving into drive or reverse, shift much harder than it used to, hold a gear longer than expected, or seem to change gears at unusual times. Some drivers describe the vehicle as surging or jerking during acceleration. Another important symptom is slipping. If engine RPM rises but the vehicle does not accelerate at the same rate, the transmission may not be transferring power normally. Slipping can sometimes be intermittent at first, especially under heavier acceleration, but it deserves professional attention before it becomes more severe. Unusual noises can also provide clues. Whining, humming, clunking, or grinding that changes based on vehicle speed or transmission operation may indicate that something within the drivetrain needs to be inspected. Do Not Ignore Transmission Fluid Leaks Fluid underneath your vehicle should always be investigated, particularly when it may be transmission fluid. The transmission depends on the proper amount and condition of fluid for lubrication, cooling, hydraulic pressure, and normal operation. Driving with the fluid level too low can increase heat and wear and potentially create additional damage. Transmission fluid service requirements also vary significantly by vehicle. There is no single interval or fluid that applies to every make and model. The appropriate approach is to follow the manufacturer's specifications and evaluate the vehicle based on its mileage, service history, operating conditions, and transmission design. A Warning Light Does Not Automatically Mean a New Transmission Modern vehicles monitor transmission operation through electronic control systems. A warning light or stored diagnostic trouble code may indicate a transmission-related concern, but the code itself does not necessarily mean the entire transmission requires replacement. Sensors, wiring, fluid pressure problems, control components, and other faults can create symptoms that feel like a major mechanical failure. Proper diagnosis gives you the information needed to make a rational repair decision instead of assuming the worst. If your vehicle has started shifting differently, hesitating, slipping, leaking fluid, or displaying a transmission-related warning, Avid Autocare can inspect and diagnose the problem. Addressing a change early gives you a better opportunity to understand what is happening before the vehicle becomes difficult or impossible to drive.
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