Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
Choosing the right transmission cooler line for your Dodge Journey matters because a proper line maintains fluid circulation and helps prevent overheating or fluid loss. Faulty or ill-fitting lines can lead to leaks, degraded cooling performance, and greater wear on transmission components.This guide highlights seven shortlisted transmission cooler lines that address common fitment and durability concerns. We evaluated each option for build quality, leak resistance, and ease of installation, and the summaries below will help you pick the best match for your needs.
Looking for other parts? See all Dodge Journey parts & accessories.
Top Picks at a Glance
| Best overall The best all-around choice for most situations | EVIL ENERGY 6AN Braided Transmission Cooler Line Kit, 15 ft |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman 624-284 Automatic Transmission Oil Cooler Hose Assembly |  |
| Best Value The sweet spot between price and what you get | Autoutfit AN6 15ft Transmission Cooler Line Kit, Black Nylon-Braided |  |
| Best budget The cheapest option that still gets the job done reliably | Yunnergo 70" AN6 Stainless Steel Braided Transmission Cooler Lines Kit |  |
| Most popular A crowd favorite that many people choose with confidence | maXpeedingrods 6AN Nylon Stainless Steel Braided Fuel Line Kit (20 ft) |  |
| Best Seller A high-volume bestseller chosen again and again | Generic 6AN 70" Stainless Steel Braided Transmission Cooler Hose Line Kit |  |
1. EVIL ENERGY 6AN Braided Transmission Cooler Line Kit, 15 ft
| Hose length | 15 Feet |
|---|---|
| Hose ID | 0.31 inches |
| Hose OD | 0.56 inches |
| Maximum working pressure | 750 psi |
| Temperature range | -22°F to 248°F |
This EVIL ENERGY kit supplies 15 feet of 6AN braided line plus a selection of swivel hose ends, adapters and clamps intended for routing a transmission cooler on a Dodge Journey. The hose uses a CPE rubber inner with 304 stainless wire and a nylon braid, which keeps the line flexible for routing while resisting abrasion and heat found near the transmission and cooler. Included fittings (straight and 90 degree swivel ends, 6AN-to-1/4 NPT adapters and flare fittings) make it possible to customize runs and connect aftermarket coolers or sandwich adapters without fabricating junctions. Its 750 psi working pressure and high burst rating give a wide safety margin for automatic transmission fluid circulation. Watch for occasional reports of missing or non-matching fittings, so verify fitment for your Journey and be prepared to source one small adapter if needed. The kit is a practical, visually tidy option for replacing or upgrading the transmission cooler plumbing on a Dodge Journey when you want a durable, routed line and a professional look.
Best for: A balanced all-round buyer who wants a durable, customizable transmission cooler plumbing solution that looks professional and handles everyday towing or towing-lite duty on a Dodge Journey.
Less Ideal for: Not ideal for owners seeking a vehicle-specific plug-and-play hose kit with guaranteed matching fittings or for heavy-duty commercial towing where a purpose-built OEM replacement system is recommended.
- 15 feet of braided 6AN hose allows flexible routing and customization
- CPE rubber core with 304 steel wire and nylon braid for abrasion and heat resistance
- Comes with multiple swivel fittings and adapters to simplify connections
- 750 psi rated working pressure with a high burst pressure for safe transmission fluid use
- Some buyers reported missing or incompatible fittings requiring an extra adapter or replacement part
- Does not include vehicle-specific instructions so check fitting compatibility with the Dodge Journey before installation
Verdict: A flexible, high-pressure braided 6AN line kit that offers a durable, customizable transmission cooler plumbing upgrade for Dodge Journey owners seeking a professional-looking installation.
2. Dorman 624-284 Automatic Transmission Oil Cooler Hose Assembly
| Material | Metal, Rubber |
|---|---|
| Maximum Pressure | 100 Pound per Square Inch |
| Model | Dorman 624-284 |
| OEM Part Number | 5801405; 5005204AA; 5005204AC; 5005204AD; 5005204AE; 5005204AF; 5005204AG; 5005205AA; 52014764AA |
This Dorman transmission oil cooler hose assembly is a direct-fit replacement intended to restore transmission cooling when the original line is leaking or damaged. It pairs metal and rubber construction with molded fittings to replicate factory routing and connections, so installation follows the same steps as the original part. Typical use is a repair on vehicles with leaking cooler lines where you remove the old assembly, reuse the retaining clips, and bolt the new line into place to stop leaks and recover proper transmission cooling. Notable features include a ready-to-paint exterior, a listed maximum pressure rating, and coverage for many Chrysler and Dodge models. Practical benefits are solid fitment for matching model years, durable materials that resist common failure modes, and ample buyer feedback confirming leak-free performance. Limitations are that Dorman does not include snap-in retainer clips in the pack and some users note small differences at the hose ends that may require careful seating during installation. If you need new clips or want exact OEM-style lead-in chamfers, plan to source those separately.
Best for: Practical optimizers who prioritize reliable, cost-effective repairs and prefer a factory-style replacement that fixes leaks without upcharging for dealer parts.
Less Ideal for: Buyers who want a complete plug-and-play kit with all small retainers included or those seeking an exact OEM end design without any fit variation should consider alternatives.
- Direct replacement designed to match factory fit and function for listed vehicles
- Durable metal and rubber construction for reliable service life
- Engineered for proper transmission cooling to address leaks and failures
- Positive user feedback showing straightforward installation and leak-free results
- Does not include snap-in retainer clips which many installations require
- Ends may differ slightly from factory parts and can feel loose until seated properly
Verdict: A budget-friendly, factory-style replacement hose assembly that reliably stops transmission cooler leaks but may require sourcing a few small retainers separately.
3. Autoutfit AN6 15ft Transmission Cooler Line Kit, Black Nylon-Braided
| Material | 304 Steel, Aluminum Alloy, Nylon, Rubber, Steel |
|---|---|
| Hose Type | Nylon-braided steel-reinforced |
| Length | 15 Feet |
| Fitting Size | AN6 |
This Autoutfit AN6 transmission cooler line kit supplies 15 feet of nylon-braided, steel-reinforced hose plus a selection of straight and 90-degree AN6 fittings and radiator/transmission adapters to build or repair a cooler line. For a DIY swap on a Dodge Journey this kit is typically used to replace corroded factory lines or to reroute plumbing when adding an auxiliary cooler. The braided hose construction (CPE rubber core, 304 steel helix, nylon braid) offers flexibility and abrasion resistance while the included aluminum fittings let you cut and assemble custom lengths. Practical benefits include plenty of spare hose for tidy routing, corrosion-resistant fittings, and the ability to trim to fit tight engine bays. Important limitations are that the radiator fittings in the kit may not fully seat in some factory radiator ports and you might need two additional vehicle-specific adapters for a proper seal, and assembling the AN fittings can be fiddly without a vise or installation experience. The kit works well as a budget-friendly, customizable replacement if you plan to confirm thread compatibility and expect some minor parts sourcing.
Best for: A practical optimizer who wants an affordable, customizable repair or reroute for a Dodge Journey transmission cooler line and values flexibility over a direct factory-style drop-in replacement.
Less Ideal for: Drivers who prefer a guaranteed factory-fit, bolt-in replacement without any parts swapping or who do not want to source or machine additional adapters should consider vehicle-specific preassembled lines instead.
- 15 feet of nylon-braided, steel-reinforced hose gives enough length for custom routing and cuts
- Includes straight and 90-degree AN6 fittings plus aluminum adapters for building a complete line
- Construction materials resist abrasion and corrosion compared with plain rubber lines
- Plenty of spare hose lets you shorten runs for a tidy engine bay without buying extra material
- Radiator-threaded adapters in the kit may not seat deeply in some factory radiator ports requiring additional adapters
- Fittings require careful assembly and can be difficult to tighten by hand without a vise or proper tools
Verdict: A budget-friendly, flexible kit that gives enough hose and fittings to rebuild or reroute a Dodge Journey cooler line but may need a couple of vehicle-specific adapters for a perfect radiator fit.
4. Yunnergo 70" AN6 Stainless Steel Braided Transmission Cooler Lines Kit
| Material | PTFE inner with stainless steel braid |
|---|---|
| Length | 70 inches |
| Inner diameter | 3/8 inch |
| Fittings included | AN6 90° and multiple NPT/NPS adapters |
This kit supplies two 70-inch PTFE-core, stainless steel braided hoses plus a selection of AN6 fittings to route transmission fluid to an external cooler. It is typically used when replacing hard cooler lines or fabricating a custom route to an aftermarket cooler; the flexible braid makes tight bends easier than rigid steel lines and the included 90 degree and NPT adapters cover common connection types. The PTFE inner hose and stainless braid provide good chemical resistance and a factory-quality sealing surface when matched to proper fittings, and the long length gives plenty of reach for front- or rear-mounted coolers. Limitations are that this is a universal kit so you must verify AN6 and NPT thread compatibility with your Scion tC plumbing and trim the hoses to length; fittings are generic and may require thread sealant or adapter changes for a precise fit. For buyers on a budget it is a practical way to upgrade to braided lines without buying vehicle-specific assemblies.
Best for: Budget-conscious owners who want a low-cost way to add or replace transmission cooler lines and are comfortable doing basic hose trimming and fitting during a DIY install.
Less Ideal for: Buyers seeking a ready-made, vehicle-specific plug-and-play line set or those who prefer professional-fit factory-style assemblies should consider a purpose-built option instead.
- Long 70-inch hoses provide ample length for custom routing to an external cooler on compact cars
- PTFE inner hose with stainless braid offers chemical resistance and a smoother internal surface for fluid flow
- Includes a variety of AN6 and NPT adapters to fit multiple connection types
- Flexible stainless braid simplifies installation in tight engine bays compared with rigid tubing
- Universal kit requires measuring and trimming to fit the Scion tC and may need additional adapters for exact thread matches
Verdict: A cost-effective universal AN6 braided hose kit that gives Scion tC owners the materials needed to add an external transmission cooler without a high-priced vehicle-specific assembly.
5. maXpeedingrods 6AN Nylon Stainless Steel Braided Fuel Line Kit (20 ft)
| Size | 6AN-20FT |
|---|---|
| Maximum Pressure | 2000 Pound per Square Inch |
| Working Pressure | 500 PSI |
| Material | CPE inner with Nylon and 304 Stainless Steel braid |
This kit supplies 20 feet of 6AN (AN6) CPE inner hose with a nylon and 304 stainless steel outer braid plus a selection of push-lock AN6 hose ends for building fuel lines or transmission cooler lines. It is typically used to run aftermarket cooler feeds, fuel return or supply lines where you need long continuous hose and simple push-on fittings. The bundle includes straight and angled push-lock ends so you can assemble run lengths without crimp tooling, and the hose is rated for wide temperatures and a high burst pressure for automotive fluids. In practice the braided cover protects the hose from abrasion and the length covers most routing needs on mid-size crossovers. Expect the included push-lock fittings to be convenient for quick installs, but some users report fitment problems or weaker fittings compared with swage-style ends, so careful assembly and verification are advisable. This kit is a practical, no-frills solution when you need flexible coolant or cooler lines routed on a Dodge Journey, but professional installations or high-pressure factory-style connections may prefer dedicated swaged fittings and adapters.
Best for: Convenience-driven owners who want an easy-to-route, ready kit for aftermarket transmission cooler lines on a Dodge Journey and prefer simpler assembly over factory-style crimped fittings.
Less Ideal for: Drivers planning a factory-quality, high-pressure swaged installation or long-term professional rebuilds should consider swaged hose assemblies or professional hose fabrication instead.
- Long 20-foot length covers most custom routing needs for transmission cooler lines on a Dodge Journey.
- Braided nylon and 304 stainless outer layer improves abrasion resistance and protects the inner CPE hose.
- Wide operating temperature range and high burst pressure suitable for automotive fluids and cooler applications.
- Includes a variety of straight and angled push-lock AN6 fittings for faster assembly without crimp tools.
- Push-lock fittings provided are basic and reported by some users to be a poor fit or less durable than swaged fittings.
- Kit requires careful assembly and verification to avoid leaks since fittings are not crimped or swaged tight from the factory.
Verdict: A convenient, long AN6 braided hose kit that simplifies custom transmission cooler runs on a Dodge Journey but uses basic push-lock fittings that may not match swaged assemblies.
6. Generic 6AN 70" Stainless Steel Braided Transmission Cooler Hose Line Kit
| Material | Stainless Steel/PTFE |
|---|---|
| Size | 70 Inches |
| Fitting Type | -6AN universal adapters |
| Wall Thickness | 0.0375 inches |
This kit supplies two stainless steel braided PTFE-lined -6AN transmission lines plus assorted swivel fittings and 90-degree adapters to route fluid from a transmission to an external cooler. It is typically used to replace corroded factory hard lines or to add an auxiliary cooler for towing and repeated highway use. The stainless braid and PTFE inner liner promise corrosion resistance and high-pressure capability, which reviewers say holds pressure well during heavy use. The universal AN6 fittings make the kit adaptable but often require additional adapter fittings or minor thread changes to mate to specific factory connections. Installation is straightforward for a mechanically inclined installer but may require purchasing ORB or vehicle-specific adapters for a proper seal. Some buyers report quality control issues such as incorrect lengths or rough fittings out of the box, so inspect fittings and connections before installation and keep replacement adapters on hand. For owners wanting an inexpensive way to add external cooling or replace failing lines, this kit can work, but it is not a drop-in, guaranteed factory-match solution for every vehicle without extra parts.
Best for: Risk-averse mainstream buyers who prioritize reliability and want an affordable way to add or replace transmission lines while minimizing heat-related transmission wear through better cooling.
Less Ideal for: Customers seeking a guaranteed factory-fit, plug-and-play replacement or those unwilling to source small adapter fittings and verify thread types before installation.
- Stainless steel braid with PTFE liner for corrosion resistance and high-pressure durability
- Universal -6AN fittings and included 90-degree adapters allow custom routing to a remote cooler
- 70-inch length covers long runs and common engine bay layouts
- Many users report reliable pressure handling under heavy loads and towing conditions
- Universal AN6 sizing often requires buying additional adapters to match factory transmission or cooler fittings
- Quality control is inconsistent; some kits arrive with incorrect lengths or damaged/used-looking parts
- Not a guaranteed direct-fit factory replacement for every vehicle without modifications
Verdict: A versatile, cost-effective braided AN6 kit to add transmission cooling, but expect to buy adapters and inspect parts since it is not guaranteed to be a direct factory-match for every vehicle.
Choosing the Right Dodge Journey Transmission Cooler Line: Key Factors to Consider
Fitment and Compatibility
Accurate fitment is critical because transmission cooler lines must follow specific routing and connect to exact fittings on the Dodge Journey. A line that does not match factory connectors can cause leaks or require additional adapters, adding failure points. Proper compatibility reduces installation time and ensures the line clears nearby components and suspension parts.
Check connection types, mounting points, and measured lengths. Lines designed for the vehicle will often include pre-bent sections or mounting brackets to align with original hardware, which minimizes trimming or shaping during installation.
Material and Corrosion Resistance
Material choice affects longevity, especially in regions with road salt or high humidity. Steel hard lines offer stiffness and puncture resistance but need anti-corrosion coatings. Aluminum lines are lighter and resist rust but can be more vulnerable to fatigue at bends. Rubber or reinforced hoses provide flexibility but can degrade from heat and oil exposure.
Look for treated metals, plated fittings, or durable synthetic hose materials with protective outer layers. Corrosion resistance extends service life and lowers the chance of leaks developing at joints or along the line.
Connection Type and Seal Integrity
The way a transmission cooler line attaches matters more than often realized. Flared fittings, O-ring fittings, and quick-connects each behave differently under pressure and thermal cycling. A poor sealing method increases leak risk, which can cause fluid loss and transmission damage.
Assess whether replacement lines include replacement fittings or gaskets and whether they lock securely in place. Components that replicate factory sealing methods usually perform more reliably than improvised connections.
Flexibility Versus Rigidity
Choosing between hard lines and flexible hoses involves a tradeoff. Rigid lines maintain shape and resist rubbing, but they can transmit vibration and be difficult to route around tight bends. Flexible hoses absorb vibration and are easier to route, yet they may be more prone to chafing and require protective sleeves.
Consider the vehicle's mounting points and available clearance. Use rigid sections where routing is fixed and flexible sections where movement or alignment tolerance is required.
Ease of Installation and Serviceability
Installation complexity affects whether you can complete the replacement yourself or need professional help. Lines that come with integrated brackets, clear instructions, and the necessary fittings reduce install time and errors. Serviceable designs allow future component replacement without extensive disassembly.
Evaluate whether the line requires specialty tools to flare or seat fittings, and whether replacement gaskets are included. Quick-connect compatible parts can speed service but should still offer reliable sealing under pressure.
Durability Under Heat and Pressure
Transmission lines are exposed to hot fluid and pressure cycles, so temperature and pressure ratings matter. Materials and assembly methods that withstand repeated thermal expansion and contraction reduce the chance of cracks or joint failure. Reinforced hoses and pressure-rated fittings maintain integrity over time.
Review specifications such as maximum working pressure and temperature ranges if available. Prioritize options built to handle the operating conditions typical of the Dodge Journey's transmission system.
How We Chose the Best Dodge Journey Transmission Cooler Line
We prioritized fitment accuracy and leak resistance as primary filters because transmission cooler lines must match factory routing and connections on the Dodge Journey to function safely. Build materials and corrosion protection were evaluated to predict long-term durability in varying climates. We also considered ease of installation, including whether the line integrates with existing fittings and requires special tools or adapters. Flow capacity and internal diameter were reviewed to ensure adequate fluid transfer and avoid restricting cooling performance. Flexibility versus rigidity was assessed to balance vibration resistance against routing demands. Finally, we examined common failure modes such as joint corrosion and abrasion to favor designs that reduce those risks.We excluded items that lacked clear vehicle-specific fitment information, generic universal lines without Dodge Journey-specific routing details, and components missing corrosion-resistant finishes. The resulting list focuses on parts that meet practical installation needs and durability expectations for this vehicle.
Our full evaluation process is outlined in our review methodology.
FAQ
How do I know if my Dodge Journey transmission cooler line is leaking?
Look for pooled transmission fluid under the vehicle, a drop in transmission fluid level, or a noticeable transmission fluid odor. You may also see wet spots or stains along the line itself or at connection points. If the transmission is slipping or shifting roughly, that can be an indirect sign that fluid loss is affecting performance.
Can I replace a transmission cooler line myself?
Many owners can perform a replacement with basic tools if they have clear vehicle-specific instructions and the correct fittings. Ensure you secure the vehicle, relieve any system pressure, and avoid contaminating the fluid. If routing is complex or special tools are required, professional installation is often faster and reduces the risk of leaks.
When should I choose a hard line versus a hose for the transmission cooler?
Hard lines are preferable where fixed routing and abrasion resistance are priorities, while hoses are better where flexibility and vibration isolation are needed. A mixed approach often works best: rigid sections for fixed runs and reinforced hoses where movement or alignment tolerance is required.
What causes transmission cooler line failures?
Common causes include corrosion from road salt and moisture, abrasion from contact with other components, fatigue at bend points, and seal failure at fittings. Thermal cycling and exposure to hot fluid over time can also deteriorate hose materials and joint seals, increasing leak risk.
Do replacement lines include fittings and mounting hardware?
Some replacement lines include the necessary fittings, gaskets, and brackets, while others may require you to reuse original hardware or purchase adapters. Confirm what is included before starting work so you do not encounter missing parts during installation.
How long do transmission cooler lines typically last?
Lifespan varies based on material, climate, and driving conditions. Lines in dry climates and with good corrosion protection can last many years, while those exposed to heavy road salt or frequent thermal stress may fail sooner. Regular inspections help catch early wear before leaks develop.
Conclusion
When selecting a transmission cooler line for a Dodge Journey, prioritize accurate fitment, corrosion resistance, and secure connection types. Balance rigidity and flexibility according to routing needs to reduce vibration and abrasion risks. Consider ease of installation and whether replacement fittings or brackets are included.Tradeoffs are inevitable: more rigid components often last longer but can be harder to install, while flexible hoses ease routing but may require protective sleeves. Focus on the factors that matter most to your vehicle usage and local conditions to choose the most reliable option.
Explore More:
- Check out all Dodge Journey parts & accessories
- Explore Transmission Cooler Lines Maintenance & Repair Guides
- Explore Transmission & Drivetrain
- Browse all Auto Parts
