Date Published: June 29, 2026 |  4 minute read | FAQ Article by Jarod Rosin at Redwater Dodge

The Ultimate Heavy-Duty RAM Towing Guide: How to Choose the Right Tow Package Before You Buy

The Four Major Pillars of Truck Towing Capability

To ensure your vehicle is genuinely prepared for heavy hauling, you must factor in four fundamental components when choosing your package:

Factory Brake Controller

An integrated system that allows your truck to communicate seamlessly with your trailer's brakes, synchronising stopping power for maximum safety.

Upgraded Powertrain Cooling

Enhanced cooling loops specifically engineered to keep temperatures stable when hauling heavy loads under high stress.

Axle Ratios

The gear ratio inside the differential that determines how many times the driveshaft rotates relative to the wheels. This heavily impacts torque delivery and overall pulling power.

Maximum Tow Rating 

The absolute weight threshold configuration assigned to your specific VIN from the factory.

What Can Be Retrofitted Aftermarket vs. What is Permanent?

A frequent question our team handles at the service centre is whether certain towing options can be installed after you drive off the lot. The answers are a mix of quick fixes and hard realities.

The Good News: Certain options, such as the factory brake controller or premium tow mirrors, can be seamlessly added later on by our factory-trained technicians or sourced through reputable aftermarket suppliers.

The Hard Reality: Structural mechanical foundations cannot be easily or affordably altered after the truck is manufactured. Chief among these is your axle ratio.

When browsing heavy-duty configurations, you will notice significant variance. For example, a gasoline-powered heavy-duty RAM may feature a 3.73 axle ratio, while a heavy-duty Cummins diesel truck might utilize a 3.42 axle ratio. This ratio changes the truck's entire torque curve and legal maximum towing capacity. Attempting to swap out front and rear differential gears down the road to boost capacity is an incredibly complex, expensive, and warranty-complicating endeavour. It is always best to select the correct mechanical setup straight from the factory floor.

Navigating Western Canada: Mountain Towing and Heavy-Duty Cooling

If your travelling plans involve pulling heavy loads through mountain passes or across challenging Canadian terrain, cooling is your absolute first line of defence.

Pulling thousands of pounds up a steep, sustained incline places an immense thermal load on your vehicle. Opting for specialized heavy-duty cooling setups, including dedicated engine oil, transmission fluid, and heavy-duty radiator cooling, is paramount to ensuring your truck operates within safe parameters. Without these features, you risk catastrophic component failure in remote areas, away from immediate service support.

Protecting Your Asset: Maximising Resale Value

Investing in a well-optioned tow package is not just about immediate utility; it is a smart financial strategy for the future.

Even if your current trailer does not demand every single pound of pulling power that your truck offers, choosing upgrades like heavy-duty cooling, factory tow mirrors, and an integrated brake controller will directly maximise your truck's resale value. When the time comes to upgrade or trade your vehicle in through Rig Ready Approves, a highly capable towing setup makes your truck exceptionally desirable to buyers on the pre-owned market.

The Golden Rule: The Three-Year Rule of Truck Shopping

The single best piece of advice we can give you is this: Do not shop for the trailer you own today. Shop for the trailer you envision yourself owning three years down the line. Give yourself the mechanical breathing room to grow into your vehicle's capabilities. If you are ready to find a rig that satisfies your current lifestyle while perfectly securing your future plans, give our team a call today at 780-942-3629 or stop by the dealership in Redwater.

Additional Relevant Frequently Asked Questions

Q1. What is the difference between payload capacity and towing capacity?

A1. Payload capacity refers to the maximum weight your truck can carry inside the cabin and cargo bed, including passengers and the tongue weight of your trailer. Towing capacity is the maximum weight your truck can pull behind it. Exceeding your payload capacity is often easier to do than exceeding towing limits, making it a critical metric to check.

Q2. How can I confirm the exact axle ratio of a specific RAM truck on your lot?

A2. Every truck features a unique equipment listing. You can look at the original factory window sticker, check the build sheet via the VIN, or speak directly with our sales specialists. We can instantly pull up the precise mechanical build sheet to verify if the truck features a 3.42, 3.73, or 4.10 rear axle ratio.

Q3. Does installing an aftermarket lift kit alter my RAM's towing capacity?

A3. While a custom lift kit (like those featured on our premium Rig Ready Rams) provides outstanding ground clearance and style, oversized tires and suspension modifications can subtly change your effective gear ratio and center of gravity. At Redwater Dodge, our Journeyman technicians calibrate our builds properly, ensuring you maintain optimal stability, utility, and factory warranty protection.