Common problems with the 2004 Dodge 3500 Diesel include difficulty starting, engine stalling, and transmission slippage. The truck’s 6.7 liter Cummins diesel engine may also experience a lack of power and increased fuel consumption due to faulty injectors or an intake manifold leak in the turbocharger. Additionally, owners have reported issues related to the vehicle’s cooling system such as coolant leaks from the radiator or water pump failure.

Electrical components such as spark plugs and wiring harnesses may cause ignition problems that can lead to misfires. Finally, some drivers have complained about oil pressure drops due to dirty filters or worn out seals in the crankcase assembly preventing proper lubrication of moving parts.

The 2004 Dodge 3500 Diesel has been known to have its fair share of problems, from transmission issues to fuel system problems. Many owners report that their vehicle is prone to stalling and losing power unexpectedly, while others cite a decrease in performance due to lack of maintenance. Additionally, some drivers have had difficulty with the brakes not responding as expected when pressed.

If you are considering purchasing this model, it would be wise to research common issues thoroughly before making your purchase decision.

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Is a 2004 5.9 Cummins a Good Engine?

The 2004 5.9 Cummins engine is a great option for anyone looking for a reliable and powerful diesel engine. It has been around since the mid-1980s, so it has had plenty of time to prove itself as one of the most popular engines in its class. The 5.9 Cummins has earned a reputation for being incredibly dependable, with many owners reporting upwards of 500,000 miles on their vehicles without any major mechanical issues or breakdowns.

Additionally, this engine offers superior towing capacity due to its increased torque output over other diesels in its class and delivers excellent fuel economy while doing so – often achieving up 20 mpg on the highway when properly maintained. Finally, parts are relatively inexpensive and easy to find at local automotive stores or online retailers like DieselSite or eBay Motors which makes repairs down the line much more manageable than some other types of engines out there today. All things considered, if you’re looking for a reliable workhorse that can handle whatever jobs you throw at it – then look no further than the 2004 5.9 Cummins Engine!

What are the Best Years of the 5.9 Cummins?

The 5.9 Cummins is one of the most popular diesel engines ever built and its longevity has earned it a reputation for dependability, power, and efficiency. It was first introduced in 1989 as an option to replace the aging 6BT engine in Dodge Ram pickups but quickly found a home in many other makes and models. As such, there are quite a few different years of production that boast their own unique performance attributes.

Generally speaking, the 1994-1998 model years are considered by many to be some of the best years for this engine due to improved fuel system components like high pressure injection pumps, higher flowing injectors and stronger connecting rods compared to earlier models. The 1998 model year also saw significant changes with better air flow through larger valves and increased compression ratio which resulted in significantly more torque output than prior versions – making it an incredibly capable workhorse even today! Additionally, later model 5.9s (2003-2007) have proven themselves adept at handling modifications while still retaining good stock reliability due to improved engineering from Dodge/Cummins over these last two decades.

This makes them attractive options over older designs if you plan on upgrading your truck’s performance down the road or simply want a reliable daily driver right off the bat!

How Many Miles Per Gallon Does a 2004 Ram 3500 5.9 Cummins Get?

The 2004 Ram 3500 5.9 Cummins is a powerful and reliable work truck, but how much fuel does it consume? The answer depends on the type of transmission you have. If you have an automatic transmission, your 2004 Ram 3500 5.9 Cummins can get up to 17 miles per gallon (MPG) on the highway and 13 MPG in the city.

If you have a manual transmission though, your 2004 Ram 3500 5.9 Cummins will get up to 18 MPG on the highway and 14 MPG in the city – providing that extra bit of fuel efficiency for those long trips or daily commutes around town. As with any vehicle though, these numbers can vary depending on driving habits, terrain conditions, weather patterns and other factors; so you may see slightly different results than what just mentioned above when driving your 2004 Ram 3500 5.9 Cummings regularly!

What Year Cummins Engine is Most Reliable?

Cummins engines have been around for decades, and many people consider them to be some of the most reliable engines available. While there are several different models that have been released over the years, one stands out as being particularly reliable: the 5.9L Cummins engine from 1989-2002. This model is renowned for its dependability and longevity, with many examples still running strong after hundreds of thousands of miles on their odometers.

It features a cast iron block with four valves per cylinder and an electronic fuel injection system that helps ensure smooth operation even in harsh environments. The turbocharger provides additional power when needed while also helping keep emissions low, making it an ideal choice for anyone looking for an engine they can rely on no matter what conditions they find themselves in.

2004 Dodge 3500 Diesel Problems


2004 Dodge Cummins Pros And Cons

The 2004 Dodge Cummins is a powerful and reliable diesel pickup truck that offers plenty of torque, but it’s not without its drawbacks. On the pro side, the Cummins engine provides excellent fuel economy, strong pulling power, and good overall reliability. Additionally, it has a large cargo capacity for hauling heavy loads with ease.

However, some may find the ride quality lacking due to its stiff suspension system and loud cabin noise when accelerating or driving at higher speeds. Also keep in mind that parts for this older model can be difficult to source since production ended in 2003.

2004 Dodge Ram 3500 Transmission Problems

Owners of the 2004 Dodge Ram 3500 have reported problems with their trucks’ transmissions, including hard shifting and slipping gears. The most common issue seems to be transmission fluid leakage, which can cause a variety of other issues like grinding or jerking when shifting gears. It is important to get these repairs done quickly as neglecting them can lead to more costly repairs down the road.

2004 Dodge Ram 3500 Diesel Reviews

The 2004 Dodge Ram 3500 Diesel is a popular choice among diesel truck owners, earning high marks for its performance and reliability. With a powerful 5.9 liter Cummins Turbo Diesel engine, this pickup can easily tow heavy loads with ease. In addition to its impressive power output, the 2004 Dodge Ram 3500 Diesel also offers excellent fuel economy for those looking to save at the pump.

Owners have praised the smooth ride quality and overall durability of their vehicles, making it one of the most reliable pickups on the market today.


In conclusion, it is clear that the 2004 Dodge 3500 Diesel can be a great truck, but it has its own set of problems. While some of these issues are minor and can be easily addressed, other more serious problems such as fuel injection or transmission issues may require professional attention and should not be ignored. It is important to research any potential vehicle before purchasing to ensure that all known issues have been addressed.

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