Can I Use Rubber Hose for Transmission Cooling Lines

Can I Use Rubber Hose for Transmission Cooling Lines?

Transmission lines are in charge of preventing the transmission from overloading by transporting hot fluid out from the transmission and returning it after the liquid has cooled. It allows the engine to rid itself of excess heat while preserving its longevity. But the query is, “Can I use rubber hose for transmission cooling lines?”

Yes, anyone can use a rubber hose for transmission cooling lines, provided it is designated for transmission cooler lines. Avoid putting it near the exhaust since rubber hoses are frequently prone to higher temperatures. Regular rubber hoses will break down and block the valve body if used.

Moreover, the transmission lines act as a transmission cooling line and often contain metal and composite alloy hoses because they can manage the flow of heated transmission fluid. So, if you want to know much more about rubber hoses, you are here in the right place. Let’s go exploring!

A Thorough Discussion to Use a Rubber Hose for Transmission Cooling Lines:

The transmission cooler line system is critical to the operation of any automatic transmission. It transfers heated fluid to the radiator through cooler lines and returns cooled liquid to the gearbox. A fluid loss that results in an overheating transmission can be disastrous since the system lacks its capacity to cool.

And, yes, rubberized transmission cooler transmission lines are widely accessible and the most affordable solution for transmission cooler lines. If you need to conduct a minor repair, you may quickly and inexpensively obtain a rubberized transmission line from any nearby auto parts store.

Rubber transmission cooling hoses are ideal for installing an external cooling or repairing a leaking metal line. 

It is usual to patch a transmission line with a rubber hose as a temporary remedy. Still, addressing the damaged pipe and performing a more comprehensive and long repair is preferable.

When it comes to rubber transmission hoses, keep in mind that if they go too close to the exhaust or other overheated components, the rubber can melt and produce leaks over time. 

That’s why rubberized transmission hose is often utilized in regions away from parts that may cause damage in the long run. Typically, your car will have some rubberized lines from the manufacturer, but not nearly as many as metal lines.

What Is Rubber Transmission Cooling Lines?

Rubberized transmission lines are universal in most situations, but they are part of more extensive pre-bent metal lines for manufacturing applications. Rubber hose is cheap and easy to come by if you need a fast patch to tide you through.

A rubberized transmission coolant hose attaches to the socket, and the other side of the hose attaches to another identical fitting on the automotive radiator. Some cars will have a secondary radiator devoted to cooling only the gearbox fluid.

Rubber transmission lines are ideal for installing an external cooler or a temporary patch for a failing metal line. 

You may use this rubber hose in the transmission cooler line, but make sure it is certified. 

The pressure is not too high (121-15 psi). Instead of worm-drive clamps, utilize double clamps or FI-type clamps.

How to Replace Transmission Cooler Lines

The transmission cooling line is critical to the correct transmission operation, yet it is also one of the most frequently overlooked. 

Its principal function is evident from its name: it links the coolant to the transmission and retains the system cold. 

It is also known as a cooler line and simply a transmission line. The following is a complete description (step by step) of the replacement process:

Step 1: Raise the Automobile

It’s better to work on level ground, so your vehicle doesn’t tilt more on the jack when raised. You should adequately illuminate the area. Check that you get all of the necessary safety equipment.

The first duty is to lift the car to have complete access to the underbelly. To raise the front of your automobile, utilize two jack stands; a ramp would be ideal.

Step 2:Remove the Transmission Fluid

When the car is stable, you may begin draining the transmission fluid. Remove the clasp that is holding the transmission line setup. Remember to use an oiled skillet as a base.

How to Replace Transmission Cooler Lines

Step 3: Detach the Previous Line

When the oil has been entirely drained, you must remove the old transmission line. It will necessitate the use of a wrench. Remove the nut that holds the transmission line in place. It may be necessary to use some power to pull & remove the old lines.

Keep in mind which side went to the coolant and ended up in the gearbox. Keep a note of the jumpers who held the line as well. Take a snapshot before erasing the lines, if possible.

Expect additional fluid trickles when the cooler lines are disconnected. Wait until completely emptied. Then, spray the link with brake cleaner to eliminate grit and grime.

Step 4: Set up the New Cooler Lines

It’s now time to introduce the new transmission system to the radiator and the old transmission system to the transmission. To secure the nuts, use a wrench. Use the same hooks that you used to suspend the original line.

Step 5: Resupply the Transmission Lube

After completing all of the processes, you must refill the gearbox with the proper fluid, as mentioned in the handbook.

Step 6: Double-check

Lower your vehicle and inspect it for flaws, particularly leaks. If you see liquid trickling, it signifies that the transmission lines may not have been correctly linked. In such a scenario, tighten the connections or retake the operation.

Video Instruction: How to Replace Transmission Cooler Lines

A Note of Warning

When operating your car, always use safety eyewear. Wear extra personal protection equipment (PPE), such as rubber gloves or closed-toe shoes, if needed.

What Type of Rubber Hose Is Used for the Transmission Line?

If your transmission line has already been damaged or decayed in several locations, you should repair it as quickly as possible. 

The ideal repair for this part is a replacement, although you may consider replacing the system yourself with readily available and inexpensive rubber hoses. 
The following are the sorts of rubber hoses that you should use for long-term performance:

  • Transmission-Rated Hoses

There are several kinds of rubber hoses available at the retail shop. However, not all hoses are created equal. There are specific rubber hoses with the term “Transmission” imprinted into their body – which denotes that such rubber hoses can be utilized as transmission cooling lines.
These “transmission” rubber hoses, unlike regular rubber hoses, are meant to convey oil and have a pressure of roughly 300 psi.
They are, however, still made of rubber, and all have the same vulnerability as other rubber hoses — heat. Since these rubber tubes have no further protection, you may cover them with heated hoses, particularly around the engine.

  • Hydraulic Fluid Hoses

Even if their specifications are designed for a completely different job, hydraulic tubes can serve the role of a transmission line. Hydraulic hoses have a relatively high psi rating, making them rigid and capable of withstanding high fluid pressures. They have a similar vulnerability to transmission-rated tubes and must be heat-protected.


What kind of hose can you use for transmission line?

Transmission fluid can be sensitive to certain materials, and using the wrong type of hose may lead to leaks or degradation. Here are some common options for transmission line hoses:

Transmission Cooler Line Hose:
Use hoses specifically designed for transmission cooler lines. These hoses are typically made of rubber or synthetic materials that are compatible with transmission fluid. They are designed to handle the pressure and temperature requirements of transmission systems.

High-Pressure Transmission Hose:
Ensure that the hose you choose is rated for high-pressure applications, as transmission fluid is often circulated under pressure. Check the hose specifications for its pressure rating to ensure it meets or exceeds the requirements of your vehicle’s transmission system.

SAE J1019 or J1532 Rated Hose:
SAE (Society of Automotive Engineers) standards are commonly used in the automotive industry. Hoses that meet SAE J1019 or J1532 specifications are suitable for transmission cooler lines. These standards ensure compatibility with transmission fluids and resistance to heat and oil.

Rubber Hose with High Temperature and Oil Resistance:
Look for hoses made from rubber compounds that have high-temperature resistance and are compatible with transmission fluids. Nitrile rubber, for example, is often used for hoses that come into contact with oil-based fluids.

Braided Stainless Steel Lines:
For added durability and resistance to abrasion, some choose to use braided stainless steel lines. These lines often have a Teflon inner core for fluid compatibility and a stainless steel outer braid for durability.

Can I use rubber fuel line for transmission line?

While rubber fuel line may look similar to transmission cooler line, it is not recommended to use rubber fuel line for transmission lines. The materials and construction of hoses designed for transmission cooler lines are specifically chosen to withstand the unique challenges posed by transmission fluid, which is different from fuel.

Final Verdict

Finally, we can claim that you have got the answer. To clarify, you can use a rubber hose for transmission cooler lines if certified for that purpose. 
It’s best to keep it away from the exhaust because rubber hoses are prone to overheating. Rubber hoses will blow down and block the valve body; therefore, don’t use them.

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