Picture of mechanic servicing a Cadillac on a lift
The transmission fluid in your modern vehicle's automatic or manual transmission performs many functions.

We take a look at why it's advisable to take care of your vehicle's transmission fluid and how to care for these transmission fluids to prevent expensive breakdowns and avoid being stranded on the roadside. Keep reading to find out when to change transmission fluid. 

What is Transmission Fluid?

Transmission fluid for an automatic transmission (ATF) in your car is an essential specialized hydraulic fluid that allows the transmission to function properly.

ATF facilitates the torque converter function, the smooth operation of the transmission valves and prevents excessive friction of the brake bands plus provides adequate lubrication of the internal gears.

Manual transmission fluid (MTF) performs a similar function and is formulated to provide the necessary lubrication for manual transmission components.

Checking Your Transmission Fluid

Checking your transmission fluid is important to ensure the continued fuss-free operation of the transmission. Checking transmission fluid for both low levels and the color/smell of the fluid will save you from some possible nasty future damage and the associated repair costs.

Low fluid levels in the transmission can cause overheating, failure to change gears, slipping out of gear while driving, all leading to damage to the gearbox and other connected components.

Contaminated transmission fluid may not provide the required level of performance in an automatic transmission, plus you run the risk of damages due to the reduced protection and lubrication.

Picture of mechanic servicing a Cadillac 

Recommended Changing Intervals

Automatic and manual transmissions operate slightly differently and, as such, will have differing service requirements and vehicles such as pickups or SUVs being driven in harsher conditions such as hotter deserts or dusty areas will need more regular fluid change intervals.

Manual

Typically, the fluid in a manual transmission should be replaced every 30,000 to 60,000 miles. Most automakers recommend this commonly accepted range for passenger vehicles under typical driving conditions.

Automatic

In automatic transmissions/transaxles, the recommended fluid change interval is about every 30,000 miles or 30 months. Owners are advised to check their owner's manual or service manual for their model's specifics. 

The automatic transmission fluid should ideally be drained and replaced as soon as the transmission dipstick reveals dark or burnt-smelling transmission fluid.

Signs Your Cadillac Needs a Transmission Fluid Flush

Let's take a look at some tell-tale signs that indicate your Cadillac lets you know when to change transmission fluid. 

Your car isn't shifting gears, or the acceleration is not quite right. Slipping out of gear is immediately noticeable with loss of forward motion, which is both frustrating and dangerous, with increased risks of an accident. Unusual smells from underneath your vehicle should get you concerned.

Rough running from the drivetrain will point to a possible transmission fluid problem.

Besides these signs you may also get a "Check Engine" or "Transmission Warning" light on your dashboard, alerting you to the issue at hand. Visiting your nearest Cadillac service center at the earliest opportunity is highly recommended.

Picture of a women picking a Cadillac up from the service center 

Service Your Cadillac at Colonial Cadillac

Make sure your Cadillac is kept in its best driving condition by servicing your car at Colonial Cadillac in New London, CT. We will take care of your Cadillac and let you know when to change transmission fluid. 

Colonial Cadillac's service department is dedicated to maintaining and repairing all Cadillac vehicles with its team of certified skilled technicians to further enhance your Cadillac ownership experience.