
Deep transmission pans are designed to hold more fluid than standard pans, typically adding 2 to 4 quarts of extra capacity. This additional fluid can provide several benefits to the transmission system. Firstly, it helps to cool the transmission fluid (ATF) more effectively, which can prolong the lifespan of the transmission. Secondly, the extra fluid can improve the performance and longevity of the transmission, especially in larger vehicles or those used for towing and hauling. However, some experts argue that adding extra fluid may only mask underlying issues with the transmission or shifting behaviour, and that addressing these problems directly is a more cost-effective solution. While deep pans can enhance cooling, some argue that the impact is minimal compared to dedicated transmission coolers. The choice of pan material, such as aluminum or chrome, can also influence cooling performance and maintenance requirements. Overall, while a deep transmission pan can offer advantages, it is essential to consider the specific needs and characteristics of the vehicle, as well as potential alternatives, before making a decision.
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What You'll Learn

Deep transmission pans can hold 2-4 quarts of extra fluid
The extra transmission fluid also helps to cool the automatic transmission fluid (ATF) and, when combined with an external transmission cooler, can significantly lengthen the lifespan of your transmission. This is because the transmission fluid has many functions beyond lubrication, including cleaning metal surfaces, preventing rust, extending the temperature range, preventing fluid oxidation, and conditioning gaskets.
Deep transmission pans are available in a variety of materials, including chrome and aluminium. Chrome pans are often made of steel with a chrome plating, which makes them shinier, easier to clean, and better at preventing corrosion than steel pans. Aluminium pans, on the other hand, are highly regarded as the best type of transmission pan due to their superior heat dissipation and cooling capabilities. They are also sturdier and make sealing an easier process. However, aluminium pans are often more expensive and harder to find in stock depth.
Some deep transmission pans also come with additional cooling features, such as cooling fins or cooling tubes, which further enhance their cooling capabilities. These pans tend to be pricier than regular stock and deep pans without these features. Ultimately, the decision to use a deep transmission pan depends on your vehicle's specific needs and the trade-offs between cost, cooling, and fluid capacity.
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This extra fluid helps cool the transmission
The transmission fluid in a car is responsible for keeping the transmission cool. This fluid is pumped into the transmission cooler, which is located inside the car's radiator. As the fluid passes through the radiator, it is cooled down by the coolant and then sent back to the transmission. This process ensures that the transmission fluid does not overheat, which could lead to damage.
To enhance this cooling process, some car owners choose to install an aftermarket transmission cooler. This is especially useful for vehicles that are frequently used for towing or hauling heavy loads, as well as those driven in rough conditions such as hilly or mountainous terrain. By installing a larger transmission cooler, the fluid can be cooled more effectively, even when the transmission is working harder than usual.
One way to increase the cooling capacity of the transmission fluid is to use a deeper transmission pan. A deeper pan allows for more fluid to be stored, which can help to maximise the cooling power. For example, a deep aluminium pan not only provides additional fluid capacity but also dissipates heat better due to its material properties. This combination of increased fluid volume and improved heat dissipation can significantly enhance the cooling performance of the transmission system.
Additionally, some transmission pans come with extra cooling features such as cooling fins or cooling tubes. These features further improve the heat dissipation capabilities of the pan. Cooling fins, for instance, provide a larger surface area for the fluid to come in contact with, maximising heat transfer and minimising pressure drop. Similarly, cooling tubes allow air to pass through the pan while the vehicle is in motion, providing a continuous flow of cool air to reduce the fluid's temperature.
By utilising a combination of strategies, such as installing aftermarket transmission coolers, opting for deeper transmission pans with higher fluid capacity, and incorporating cooling fins or tubes, car owners can effectively improve the cooling performance of their transmission systems. These measures help prevent heat-related failures, extend the lifespan of the transmission, and improve overall performance, especially under demanding driving conditions.
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Transmission flushes are more expensive than pan drops
The cost of a transmission flush can range from $150 to $400, depending on factors such as vehicle size and whether the service is performed at an independent mechanic or a dealership. Some mechanics may offer transmission flushes for around $100, but these deals often have limits on the number of quarts of fluid used. For example, a transmission flush for a small car that takes about eight quarts of transmission fluid could cost around $250 if done at a dealership using original equipment manufacturer (OEM) fluid.
In contrast, a pan drop typically requires draining and replacing three to seven quarts of fluid, depending on the vehicle. The cost of a pan drop can vary depending on factors such as vehicle size, who performs the service, and the type of fluid and filter used. For a small vehicle, a pan drop could cost as little as $50 to $75 if done by the owner. However, having a mechanic perform a pan drop on a heavy-duty truck could cost upwards of $200 to $300, especially if OEM fluid is used.
While a transmission flush is more expensive, it offers the benefit of replacing almost all of the old, dirty fluid with new, high-quality fluid. This can result in improved performance, as the new fluid provides the correct frictional properties and helps the transmission run cooler. However, some people warn against performing a flush on a transmission with old, dirty fluid as it may increase the risk of dislodging debris and causing it to settle in the wrong place. Additionally, flushes have fallen out of favour with some automakers due to concerns about changing the operation of the transmission.
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Pan drops only remove a third of the fluid
Transmission fluid can be removed without dropping the pan, and this method will only remove about a third of the fluid. This can be done through a pump that sucks the fluid out through the dipstick tube. This method is much cleaner and quicker than dropping the pan, and can be done in a few minutes. However, it is important to ensure that the correct type of pump is used, as some pumps may not be suitable for this task.
The transmission fluid in your vehicle should be changed periodically to ensure it remains clean and shifting properly. A pan-drop fluid change is a cheaper option, but it only removes about a third of the old fluid, which can reduce the performance of the new fluid. It is also a messy and time-consuming process. It can be difficult to access the transmission pan on some vehicles, requiring the removal of plastic splash guards or metal skid plates. There is also a risk of rusted, stuck bolts if you drive in wet, snowy conditions.
A transmission flush is a better option if you want to ensure the removal of nearly all the old transmission fluid. The benefits of a flush are clear: all the old, dirty fluid is replaced with fresh, high-quality fluid. This helps the transmission run cooler and provides maximum protection against wear and tear on clutches, gears, and bearings. It also improves shift consistency and quality.
A deep transmission pan allows the transmission to hold an extra 2 to 3 quarts of transmission fluid. This extra fluid capacity helps to maximize cooling power. Many people prefer an aluminum cast transmission pan because they are more durable and make sealing easier. However, deep aluminum pans are often the most expensive. Pans with extra cooling features like cooling fins or cooling tubes are also available, but they are often pricier than regular stock and deep pans.
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Aluminium pans are more durable and easier to seal
Aluminium pans are highly regarded as the best type of transmission pan. Aluminium helps to dissipate heat better, which ultimately cools ATF more. Aluminium pans are also sturdier and easier to seal.
Aluminium is a soft, malleable metal that is an excellent conductor of heat. It has been used for centuries to create pots and pans because it is lightweight, inexpensive, and very durable. Aluminium pans are typically coated with other materials to prevent them from corroding in the presence of acidic foods like tomatoes or lemons. On its own, aluminium is an excellent conductor of heat but warps easily, so sandwiching it with layers of more heat-resistant cookware can help it last longer.
Anodized aluminium cookware undergoes a special electrochemical process to curtail leaching. There are standard anodized and hard anodized aluminium cookware options. Hard anodized aluminium cookware undergoes a more intensive anodization process, resulting in a harder and more durable surface. This surface is highly resistant to scratching, corrosion, and wear, and is less likely to dent or warp. The anodization process significantly hardens the surface of the aluminium, making it more scratch-resistant. This added durability extends the lifespan of anodized aluminium cookware, making it a long-term investment for your kitchen. Anodized aluminium pans are also less likely to react with acidic or alkaline foods, so you can cook a wider range of dishes without worrying about potential flavour changes or harmful chemical reactions.
Aluminium transmission pans offer more fluid capacity and some extra cooling. They also stiffen the transmission case substantially. However, they are often more expensive and harder to find in stock depth.
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Frequently asked questions
A transmission pan is a container for transmission fluid, which helps cool ATF (Automatic Transmission Fluid).
A deep transmission pan can hold 2 to 3 extra quarts of transmission fluid, which helps to cool the ATF. This is especially useful for larger vehicles or those used for towing/hauling. Deep pans can also be made of aluminium, which helps to dissipate heat better.
Aluminium pans are sturdier and make sealing an easier process. They can also come with additional cooling features such as cooling fins or tubes, which help to further dissipate heat.
It is recommended to service your transmission pan periodically to ensure it remains clean and functioning properly. The frequency of servicing will depend on the transmission's capacity, where the service is performed, and the cost of filters and gaskets.











































