Jecoupoon 6AN 70" Braided Stainless Transmission Cooler Hose Kit, Fits 4L60E/4L80E — Leak‑Resistant

Jecoupoon's 70" 6AN braided stainless-steel transmission cooler hose kit provides a flexible, leak-resistant line set engineered to improve cooling for popular automatic transmissions like 4L60E, 4L80E and TH350.

This complete hose kit replaces rigid lines with 70 inches of 6AN braided stainless hose and fittings designed to handle transmission fluid circulation and heat dissipation. Built from woven stainless braid over a flexible core, the lines are corrosion-resistant, simple to route in tight engine bays, and compatible with a wide range of General Motors and aftermarket transmission applications from TH350 to 4L80E.

How does this kit improve transmission cooling?

The 6AN braided hoses deliver consistent fluid flow to an external cooler while resisting expansion under pressure, helping maintain lower fluid temperatures under load. Better heat transfer and reduced pressure loss can extend component life and support more stable shift performance during heavy use.

• 70" overall hose length for flexible routing to remote coolers
• 6AN fittings match common cooler and adapter ports
• Stainless braid resists heat and abrasion compared with rubber lines
• Designed for efficient fluid flow and reduced temperature rise

Which transmissions and vehicles is the kit compatible with?

This kit is specified for a broad set of automatic gearboxes used in GM and swapped vehicles. It fits TH350/400, Turbo 350/400 derivatives, 200-200R4, 700R4, 4L60 series (including 4L60E/4L65E), and 4L80E (1996–2021), as well as C4–C6 and AOD family applications with compatible fittings.

• Direct compatibility: 4L60, 4L60E, 4L65E and 4L80E (1996–2021)
• Fits many older boxes: TH350, TH400, C4, C6, AOD
• 6AN adapters suit most aftermarket coolers and ports
• Works for swaps where flexible routing is needed

What are the material and installation advantages?

The hoses use a flexible stainless-steel braided outer layer that stays pliable for bending around brackets and tight engine compartments. The braid offers durability and leak resistance while the internal construction minimizes permeability and drip risk, making installation faster and sealing more reliable than plain rubber lines.

• Flexible stainless steel braid for easy bending and long life
• High sealing performance to prevent fluid loss
• Corrosion-resistant material suitable for engine-bay exposure
• Quick routing reduces installation time and rework

Will these hoses handle higher power or tow applications?

The 6AN size and braided stainless construction are chosen to handle increased heat and pressure typical of towing, performance driving, or vehicles with upgraded cooling systems. While not a guaranteed cure for thermal issues, the kit is a robust upgrade over factory rubber lines when combined with an appropriately sized cooler.

• 6AN diameter supports higher flow and pressure than many OEM hoses
• Braided stainless resists ballooning under load
• Compatible with aftermarket coolers for improved thermal capacity
• Recommended as part of a complete cooling upgrade for extreme use

Who is this for: This Jecoupoon 70" 6AN transmission cooler hose kit is aimed at mechanics, hot-rodders, and enthusiasts doing transmission swaps, repairs, or cooling upgrades on GM-derived transmissions and popular automatic boxes. It’s ideal for anyone who needs a durable, easy-to-route replacement for factory lines—especially where improved sealing, heat resistance, and compatibility with aftermarket coolers are priorities.