A Guide to the 2012-2014 Ram C/V Automatic Transmission Oil Cooler
Keep your Ram C/V's transmission from overheating by understanding its unique cooling system.
- The main transmission cooler is integrated into the engine radiator; it is not a separate part.
- The most common failure is leaking external fluid lines, not the cooler itself.
- A pink, milky substance in your coolant means the radiator has failed internally and you should stop driving immediately.
- For heavy use, adding an auxiliary cooler from a brand like Hayden or Four Seasons is a smart upgrade.
Understanding Transmission Cooler Issues on the Ram C/V
When you're looking for a transmission cooler for your 2012-2014 Ram C/V, it's important to know that the main cooler is part of the engine radiator. This means problems usually fall into two categories: a major internal failure or a more common external leak.
1. Internal Radiator Failure (The 'Strawberry Milkshake')
The most serious, but less common, failure is when the cooler inside the radiator breaks. This allows engine coolant and transmission fluid to mix. Mechanics call the resulting pink, sludgy fluid the "strawberry milkshake of death" because it quickly destroys the transmission's internal clutches and components. If you see this milky substance in your coolant overflow tank, stop driving immediately. The only fix is to replace the radiator and have the entire transmission and cooling systems professionally flushed.
2. External Transmission Line Leaks
A much more common issue on these vans is leaking from the external transmission cooler lines. These metal and rubber hoses run from the transmission to the radiator. Over time, the crimps where the metal meets the rubber can weaken and leak red or brownish transmission fluid. You might notice drips on the ground or see the lines themselves looking wet and grimy.
🎬 Watch: How to replace leaking transmission cooler lines.Symptoms of a Failing Transmission Cooler System
- Fluid Leaks: Puddles of reddish fluid under the front of your van are a clear sign of a leak.
- Transmission Overheating: A warning light on your dashboard may indicate the transmission is too hot. This happens when fluid is low from a leak or if the cooler is clogged.
- Erratic Shifting: If fluid is low, you may feel the transmission shifting harshly, hesitating, or slipping out of gear.
- Milky Coolant: A pink, foamy substance in your coolant tank is a sign of a severe internal radiator failure.
Choosing the Right Aftermarket Part
Since the main cooler is part of the radiator, your choice of part depends on the problem.
| Problem | Solution | Available Brands |
|---|---|---|
| External Line Leak | Replace the leaking transmission cooler lines. This is the most common and affordable repair. | Mopar (OEM), Dorman, Four Seasons, Hayden |
| Internal Radiator Failure | Replace the entire radiator assembly. This is a more involved and expensive repair. | Mopar (OEM), Aftermarket Radiator Brands |
| Heavy Towing or Hauling | Add a supplemental (auxiliary) cooler. This is installed in addition to the factory system to provide extra cooling capacity. | Hayden, Four Seasons, B&M, Derale |
Pro Tip: For most owners, a leaking line is the real issue. Replacing the lines with a quality aftermarket or OEM set is a straightforward repair. Adding an auxiliary cooler from a brand like Hayden or Four Seasons is a good upgrade for commercial use or frequent heavy loads, 🎬 See this guide for installing an auxiliary transmission cooler. as it reduces strain on the main system.
Replacement Cost
| Part / Service | Estimated Cost |
|---|---|
| New Aftermarket Cooler Lines | $50 - $150 |
| New OEM (Mopar) Cooler Lines | $65 - $200 |
| New Aftermarket Radiator/Cooler Assembly | $150 - $400 |
| New OEM (Mopar) Radiator/Cooler Assembly | $450 - $750+ |
| Shop Labor (Line Replacement) | $240 - $320 |
| Shop Labor (Radiator Replacement) | $250 - $400 |
Frequently Asked Questions
Do I need to replace my whole radiator if my transmission line is leaking?
No. If only the external line is leaking, you only need to replace the line itself. You only need to replace the radiator if it has failed internally and is mixing coolant with transmission fluid.
Is an aftermarket cooler better than the OEM Mopar one?
The Mopar OEM radiator/cooler assembly is a direct, high-quality fit. Aftermarket radiators can be a cost-effective alternative. For auxiliary coolers, brands like Hayden and Four Seasons are well-regarded and offer a good way to improve cooling for heavy use. The stock cooler is generally considered adequate for normal driving.
Can I install a transmission cooler myself?
Replacing the lines or installing an auxiliary cooler is possible for a DIY mechanic with the right tools and experience. It involves draining fluid and can be messy. Replacing the entire radiator is a more difficult job, rated at a 3 out of 5 difficulty. 🎬 Watch this walkthrough for replacing the entire radiator assembly. If you are not comfortable working with vehicle fluids and cooling systems, it is best to leave this to a professional.
What fluid should I use after the repair?
Always use a transmission fluid that meets Mopar ATF+4 specifications. Using the wrong fluid can cause shifting problems and damage the transmission.
Helpful Videos
Technical Specifications
OEM Part Numbers: 4677782AC 5005204AG
The primary transmission cooler for the 2012-2014 Ram C/V is an integrated heat exchanger located in the side tank of the main engine radiator. It is connected via external lines compatible with the 62TE 6-speed automatic transmission and the 3.6L V6 engine.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ram C/V:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Understanding Transmission Cooler Issues on the Ram C/V
- 1. Internal Radiator Failure (The 'Strawberry Milkshake')
- 2. External Transmission Line Leaks
- Symptoms of a Failing Transmission Cooler System
- Choosing the Right Aftermarket Part
- Replacement Cost
- Frequently Asked Questions
- 🎟️ Get 5% Off