Transmission Oil Cooler Hose Kits

What Is a Transmission Oil Cooler: Prevent Costly Transmission Failure Before It Happens

An automatic transmission oil cooler stabilizes your transmission fluid temperature under heavy load. Towing, off‑roading, hot‑weather driving and frequent stop‑and‑go traffic push stock cooling past its limits. Excess heat leads to burnt fluid, slipping gears, harsh shifts and expensive transmission rebuilds. Whether you are upgrading your factory setup or replacing worn‑out parts, a complete transmission oil cooler kit delivers reliable heat dissipation. Pair it with durable transmission oil cooler lines, hoses and heavy‑duty transmission oil cooler fittings to lock in long‑term protection. Stop small overheating issues from turning into thousand‑dollar repair bills, shop our ready‑to‑fit components for your vehicle today.

Transmission Oil Cooler Line, Hose & Fittings

Cracked transmission oil cooler hose, degraded lines, bad clips or loose transmission oil cooler fittings trigger fluid leaks and sudden transmission overheating. Use a transmission oil cooler line diagram to identify worn parts before they fail. Many vehicle owners underestimate real‑world transmission oil cooler line replacement cost at repair shops. Skip expensive mechanic labor with our pre‑assembled parts for install transmission oil cooler or line repair projects. Our robust hoses, lines and clips fit most automatic vehicles, perfect for daily drivers, tow rigs and off‑road builds. Replace failing components now to restore cooler system performance and avoid being stranded mid‑drive, browse our full parts selection.

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EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black - EVILENERGY[Straight,1PC]
EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black

Engineered for high-pressure, high-temperature fuel systems, the EVIL ENERGY PTFE Hose End Fitting delivers leak-proof performance for PTFE fuel lines in performance builds, LS swaps, boosted engines, and ethanol-based fuel setups. Made from 6061-T6 aluminum with a 360° swivel design, these AN fittings ensure a clean, secure, and easy-to-assemble connection—ideal for builders who demand durability and precision.

$8.99
$8.99
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[Black,Without Bracket] black inline evil energy fuel filter with directional arrow and multiple AN fuel line fittingsevil energy fuel filter kit with stainless steel inline fuel filter, AN fittings, and mounting hardware
EVIL ENERGY Inline Fuel Filter with 6AN 8AN 10AN Adapter and Bracket Universal 10/30/40/100 Micron - Black

[Application] Universal fuel filter, includes an6, an8, an10 adapters for different size applications. With mounting bracket keeps the engine bar stylish and clean.

  • [Material] Aluminum alloy fuel filter can and stainless steel filter element.
  • [O-ring] The o-ring provides a tight seal for fittings and end caps.
  • [Function] Can be used for filtering gasoline, diesel, etc. Captures contaminant particles of 10 micron and above to protect the fuel system of the vehicle.
  • [Feature] Removable design, easy to clean or replace filter element at regular time.
  • [Installation Tips] We have debugged the installation direction of the fuel filters before delivery. Please check and ensure the closed end of the filter element docks with the spring. Let the liquid flow following the arrow from the spring end to the other end, and the fuel filter will serve longer.
$23.99
$23.99
$24.99
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[20FT] EVIL ENERGY PTFE Fuel Line Kit, complete black hose & fittings set, 180-day return[16FT] EVIL ENERGY PTFE Fuel Line Kit, black braided hose, fittings, free shipping & return
EVIL ENERGY 4/6/8/10AN PTFE Fuel Line Kit | E85 Nylon Braided Hose | 16/20FT Black Black with Comprehensive Fittings

Three-Layer Construction: Our fuel lines are constructed with a triple-layer material for unparalleled performance and protection. The innermost layer is made of PTFE for maximum chemical resistance, a braided stainless steel layer for strength and durability, and an outer nylon layer for added abrasion resistance and protection.

Multiple Sizes: We offer our fuel lines in 4AN, 6AN, 8AN, and 10AN sizes, catering to the diverse needs of various fuel delivery systems.

Fitting Types: Our kit includes a variety of fittings at 0°, 90°, 45°, and 180° angles, ensuring versatility and flexibility during installation, allowing for custom routing in tight or complex spaces.

Precision Fit and Leak-Free Performance: The combination of the PTFE inner layer and the high-quality aluminum hose ends ensures a precision fit and leak-free connection, even under extreme pressure, providing a safe and reliable fuel system.

$73.09
$73.09
$70.99
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[1 PC][2 PCS]
EVIL ENERGY AN Flare to AN ORB Male Fuel Rail Adapter Fitting
  • AN to ORB Conversion
    Converts AN flare fittings to ORB ports for fuel rails and aftermarket fuel components.
  • High Pressure Capability
    Rated up to 1500 PSI for reliable performance in fuel and oil systems.
  • Leak Free Sealing Design
    37 degree AN flare seal combined with ORB O ring ensures a secure, leak resistant connection.
  • CNC Machined Aluminum
    Made from 6061 T6 aluminum with black anodized finish for corrosion resistance.
  • Wide Size Availability
    Multiple AN sizes available to support custom fuel system layouts.
$8.99
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  • EVILENERGY EVIL ENERGY 6AN CPE Transmission Cooler Line Kit 15FT for 4L80E Fuel Line | CPE Inner Tube with 304 Stainless Steel Braid and Nylon Cover, Design for High Pressure, Heat Resistance & DurabilityEVILENERGY EVIL ENERGY 6AN CPE Transmission Cooler Line Kit 15FT for 4L80E Fuel Line | CPE Inner Tube with 304 Stainless Steel Braid and Nylon Cover, Design for High Pressure, Heat Resistance & Durability
    EVIL ENERGY 6AN CPE Transmission Cooler Line Kit 15FT for 4L80E Fuel Line | CPE Inner Tube with 304 Stainless Steel Braid and Nylon Cover, Design for High Pressure, Heat Resistance & Durability
    • Transmission Fitment: This transmission line is compatible with 4L80E transmissions, providing a reliable connection between the transmission and cooler for efficient fluid transfer. Please verify your transmission model before purchase
    • Hose Specifications: 6AN × 15FT, ID: 0.31" (8mm), OD: 0.56" (14.3mm), Max Working Pressure: 750 PSI, Burst Pressure: 2250 PSI, Temperature Range: -22°F to 248°F, Minimum Bend Radius: 2.5" (63.5mm)
    • 3-Layer Construction: Built with a durable CPE inner tube, 304 stainless steel braid, and a braided nylon outer cover, the transmission cooler line is engineered for lasting durability. The reinforced construction provides excellent flexibility while helping resist abrasion and high-pressure operation
    • High Pressure Rating: The 6AN transmission line is rated for 750 PSI working pressure and 2250 PSI burst pressure to handle demanding applications. It performs reliably from -22°F to 248°F for dependable transmission cooling
    • Wide Fluid Compatibility: This transmission line is compatible with transmission fluid, engine oil, racing fuel, diesel, hydraulic oil, and power steering fluid for versatile fluid transfer applications. Not compatible with E85.
    • Complete Kit Included: The 4L80E transmission line kit includes a 15FT hose, swivel hose ends, and adapter fittings for a complete cooling system connection. Precision-machined components ensure secure fittings and reliable installation
    $45.99
    $45.99
    $45.99
    Out Of Stock
    Out Of Stock
  • EVILENERGY EVIL ENERGY 6AN Rubber Transmission Cooler Line Kit 15FT for 4L60E 4L65E | NBR Inner Tube with Polyester Braid and CPE Cover, 3-Layer Reinforced Design for Oil Resistance, Flexibility & DurabilityEVILENERGY EVIL ENERGY 6AN Rubber Transmission Cooler Line Kit 15FT for 4L60E 4L65E | NBR Inner Tube with Polyester Braid and CPE Cover, 3-Layer Reinforced Design for Oil Resistance, Flexibility & Durability
    EVIL ENERGY 6AN Rubber Transmission Cooler Line Kit 15FT for 4L60E 4L65E | NBR Inner Tube with Polyester Braid and CPE Cover, 3-Layer Reinforced Design for Oil Resistance, Flexibility & Durability
    • Transmission Fitment: This transmission line is compatible with GM 4L60E and 4L65E transmissions, providing a reliable connection between the transmission and cooler for efficient fluid transfer. Please verify your transmission model before purchase
    • Hose Specifications: 6AN × 15FT, ID: 0.38" (9.7mm), OD: 0.65" (16.5mm), Max Working Pressure: 650 PSI, Burst Pressure: 1180 PSI, Temperature Range: -4°F to 212°F, Minimum Bend Radius: 2.6" (66mm)
    • 3-Layer Construction: Built with an NBR inner tube, braided polyester middle layer, and CPE rubber outer cover, this transmission cooler line delivers flexibility, durability, and resistance against oil, fluid, and abrasion
    • High Pressure Rating: The 6AN transmission line is rated for 650 PSI working pressure and 1180 PSI burst pressure, with reliable performance from -4°F to 212°F for dependable transmission cooling applications
    • Wide Fluid Compatibility: This transmission line supports transmission fluid, engine oil, gasoline, and diesel for versatile fluid transfer applications across multiple systems
    • Complete Kit Included: This transmission line kit includes a 15FT hose, swivel hose ends, and adapter fittings for convenient installation. Precision-machined components ensure secure connections and reliable performance
    $42.99
    $42.99
    $42.99
    Out Of Stock
    Out Of Stock
  • EVILENERGY EVIL ENERGY 6AN PTFE Transmission Line Kit 7FT for 4L60 700R4 TH350 TH400 | PTFE Inner Tube with 304 Stainless Steel Braid and Nylon Cover, 3Design for High Heat, Chemical Resistance & DurabilityEVILENERGY EVIL ENERGY 6AN PTFE Transmission Line Kit 7FT for 4L60 700R4 TH350 TH400 | PTFE Inner Tube with 304 Stainless Steel Braid and Nylon Cover, 3Design for High Heat, Chemical Resistance & Durability
    EVIL ENERGY 6AN PTFE Transmission Line Kit 7FT for 4L60 700R4 TH350 TH400 | PTFE Inner Tube with 304 Stainless Steel Braid and Nylon Cover, 3Design for High Heat, Chemical Resistance & Durability
    • Transmission Fitment: This transmission line is compatible with 4L60, 700R4, TH350, and TH400 transmissions, providing reliable fluid transfer between the transmission and cooler for efficient cooling performance. Please verify your transmission model before purchase
    • Hose Specifications: 6AN × 7FT, ID: 0.31" (8mm), OD: 0.45" (11.5mm), Max Working Pressure: 1500 PSI, Burst Pressure: 4500 PSI, Temperature Range: -76°F to 446°F, Minimum Bend Radius: 3.5" (88.9mm).
    • 3-Layer Construction: Built with a PTFE inner tube, 304 stainless steel braid, and braided nylon outer cover, this transmission cooler line provides excellent chemical resistance, heat resistance, flexibility, and durability for demanding applications
    • High Pressure Rating: The 6AN transmission line is rated for 1500 PSI working pressure, and 4500 PSI burst pressure, with reliable performance from -76°F to 446°F for high-performance transmission cooling systems
    • Wide Fluid Compatibility: This transmission line supports transmission fluid, engine oil, E85, racing fuel, diesel, and hydraulic steering fluids for versatile fluid transfer applications
    • Complete Kit Included: The transmission line kit includes a 7FT hose, swivel hose ends, and adapter fittings for convenient installation. Precision-machined components ensure secure connections and reliable performance
    $38.99
    $38.99
    $38.99
    Out Of Stock
    Out Of Stock
  • EVILENERGY EVIL ENERGY AN10 PTFE Transmission Line for GM Duramax 01-05 6.6L LB7 / LLY | PTFE Inner Tube with 304 Stainless Steel Braid and Nylon Cover, Design for Extreme Heat, Chemical Resistance & DurabilityEVILENERGY EVIL ENERGY AN10 PTFE Transmission Line for GM Duramax 01-05 6.6L LB7 / LLY | PTFE Inner Tube with 304 Stainless Steel Braid and Nylon Cover, Design for Extreme Heat, Chemical Resistance & Durability
    EVIL ENERGY AN10 PTFE Transmission Line for GM Duramax 01-05 6.6L LB7 / LLY | PTFE Inner Tube with 304 Stainless Steel Braid and Nylon Cover, Design for Extreme Heat, Chemical Resistance & Durability
    • Transmission Fitment: This transmission line is compatible with 2001-2005 GM Duramax 6.6L LB7/LLY transmissions, providing reliable fluid transfer between the transmission and cooler for efficient cooling performance. Please verify your transmission model before purchase
    • Hose Specifications: 10AN, ID: 0.52" (13.3mm), OD: 0.69" (17.5mm), Max Working Pressure: 1250 PSI, Burst Pressure: 3750 PSI, Temperature Range: -76°F to 446°F, Minimum Bend Radius: 4.5" (114.3mm).
    • 3-Layer Construction: Built with a PTFE inner tube, 304 stainless steel braid, and braided nylon outer cover, this transmission cooler line delivers excellent chemical resistance, heat resistance, flexibility, and long-lasting durability
    • High Pressure Rating: The AN10 transmission line is rated for 1250 PSI working pressure and 3750 PSI burst pressure, with reliable performance from -76°F to 446°F for demanding transmission cooling applications
    • Wide Fluid Compatibility: This transmission line supports transmission fluid, engine oil, E85, racing fuel, diesel, and hydraulic steering fluids for versatile fluid transfer applications
    • Complete Kit Included: The transmission line kit includes hose, swivel hose ends, and adapter fittings for a secure cooling system connection. Precision-machined components ensure reliable installation and performance
    $75.99
    $75.99
    $75.99

FAQs about Transmission Oil Cooler Hose Kits

What does a transmission oil cooler do on an automatic transmission?

An automatic transmission oil cooler lowers transmission fluid operating temperature. Excess heat degrades fluid, triggers slipping gears and rough shifting. It works together with transmission oil cooler lines, hoses and fittings to circulate fluid. If you tow heavy loads, go off‑road or drive in hot climates, upgrading a cooler transmission oil system extends transmission service life. When your stock unit cannot handle heat, pick up a complete transmission oil cooler kit for your vehicle.

A transmission oil cooler line diagram marks the routing for hoses, lines, transmission oil cooler fittings and transmission oil cooler line clip positions. Check the diagram to trace fluid pathways from transmission to the cooler core. Visually inspect for wet spots, cracks or loose connections on transmission oil cooler hose and metal lines. Leaks often originate at fittings or clip mounting points. If components show wear, replace instead of repairing old brittle parts with our direct‑fit replacement parts.

Professional shop transmission oil cooler line replacement cost includes labor and parts, and can run high depending on your vehicle model. Damaged transmission oil cooler lines or leaking hoses risk total transmission overheating failure. DIY install transmission oil cooler or swap lines with pre‑built assemblies can cut your expense significantly. We supply ready‑to‑fit hoses, lines, clips and fittings to complete your transmission oil cooler repair without high mechanic bills.

Yes. Adding an aftermarket transmission oil cooler kit is a common upgrade for towing, hauling and off‑road builds. Confirm you match correct transmission oil cooler hose, lines and transmission oil cooler fittings for your vehicle. Follow the transmission oil cooler installation routing reference from a transmission oil cooler diagram. Poor‑fitted hoses will leak and defeat cooling performance. Shop our matched component sets to avoid compatibility headaches.

Watch for transmission fluid leaks, rising transmission temperature readings, burnt‑smelling fluid, delayed shifts or gear slip. These point to failing oil cooler for transmission, degraded hose transmission oil cooler, split lines or bad fittings. Do not ignore these symptoms. Delayed transmission oil cooler repair can lead to full transmission failure. Check part condition against a transmission oil cooler line diagram, then select replacement coolers, hoses, lines and fittings from our catalog.

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