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Transmission Oil Line

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On the road, it's all about smoothness and maintaining the balance of your car. The smoothest drivers are always the fastest. There's a catch, though. Lightning-quick shifts and clutch kicking can damage the transmission oil line. This line is responsible for carrying lubricating fluid to different parts of the transmission.The sudden surges of fluid causes unnecessary strain on the transmission lines. A worn-out line can break and leak under the pressure. Once it does, you might want to consider a replacement.You have to be especially aware of fluid leaking from the transmission because excess loss can lead to transmission burn-out. Yes, the gears and shafts can and will overheat due to lack of transmission fluid.Warning signs include incidents where the transmission jumps out of or refuses to shift into gear. Luckily, a replacement transmission oil line is readily available here at Carparts.


• Ensures smooth, unrestricted flow of transmission fluid

• Helps keep gears and shafts fully lubricated

• Designed to fit most stock transmission systems

Transmission Oil Line Articles

  • How to Install Transmission Oil Lines on Your Vehicle 11 January 2013

    The primary function of a transmission oil line is to carry hot transmission oil away from the transmission to the external cooler. The oil is cooled, then cycled back to the transmission through an outlet hose. Here are some steps on how you can install transmission oil lines on your vehicle.

    Required skill level: Novice

    Needed tools and materials

    1. Screwdriver
    2. Pliers
    3. Knife
    4. Electrical drill
    5. Drip pan
    6. New cooler line
    7. Transmission fluid
    8. Floor jack
    9. Jack stands
    10. Flare-nut wrench

    Preparing for the task

    You will need at least two hours for the transmission if the vehicle has recently been operated. Once the transmission cooled, lift the car with a floor jack and place jack stands under the vehicle's frame. After that, place a drip pan under the transmission.

    Removing the cooler lines from the transmission

    The cooler lines are on the passenger side of the transmission on most vehicles; both lines are made of brass. Pull these lines out of the transmission underneath the vehicle and allow any fluid to drain into the drip pan, capturing any fluid that escapes from the lines. After that, loosen the integral nut on the end of each line with a flare-nut wrench and pull the lines away from the radiator.

    Reconnecting the cooler lines

    Place the tip of the oil cooler lines and their opposite ends against their fittings on the side of the transmission, then tighten the lines' integral nut with a flare-nut wrench. After these are done, you can now raise the vehicle with a jack, remove the jack stands from underneath the vehicle's frame, and lower the vehicle to the ground.

    Final touch-up steps

    Add transmission fluid to the cooler lines to complete the replacement. Turn the engine on, depress the brake pedal, and shift through gears. After that, turn the engine off, and then withdraw the transmission's dipstick tube. Finally, pour transmission fluid into the dipstick tube, and check the fluid level with the dipstick until the "Full" mark is reached.

    Checking the installation

    Start your engine, with the transmission selector lever in Park, letting it run at fast idle for one or two minutes. Stop the engine and check all connections for leaks; you might want to also check the transmission fluid level according to the manufacturer's instructions and add fluid if necessary.