Yunnergo 70" PTFE-Braided 6AN Transmission Cooler Lines Kit — 70in Hoses, AN/NPT Adapters

Yunnergo's 70" stainless-steel braided 6AN transmission cooler lines kit provides durable, leak-resistant connections for aftermarket or replacement transmission cooling on 4L80E, TH400, 700R4 and many other automatic transmissions.

This complete kit includes two 70-inch PTFE-lined hoses with stainless braid plus a selection of AN and NPT/NPS adapters so you can route, adapt and secure cooler lines for many popular transmissions. Built for flexibility and sealing reliability, the kit serves both professional mechanics and DIYers who need custom-length, high-quality hoses to connect a transmission to an external cooler or remote-mounted components.

How does this kit improve my vehicle's transmission cooling setup?

The braided PTFE hose resists heat and abrasion while the stainless braid preserves bendability and crush resistance, reducing the chance of leaks or hose failure. Using AN-style fittings and included adapters simplifies transitions between metric and NPT/NPS threads and speeds installation without cutting or splicing hoses.

• Two 70" PTFE-lined hoses for long or custom routing
• Stainless-steel braid for abrasion and heat resistance
• Multiple AN-to-NPT/NPS adapters for broad compatibility
• 6AN fittings that thread into common transmission ports and coolers

Will these lines fit my transmission (4L80E, TH400, 700R4, etc.)?

The kit is designed for universal compatibility across many automatic transmissions including 4L80E, TH400, 700R4, 4L60E and similar models when paired with the proper adapter fittings. The supplied AN6 adapters and NPT/NPS adapters let you convert to the thread type your transmission or cooler requires.

• Compatible with AOD C5, TH350, TH400, 4L60E, 4L80E, 700R4 and more
• AN6 (6AN) fittings match many aftermarket coolers and adapters
• Includes 6AN-to-1/4" NPT, 3/8" NPT and 1/4" NPS adapters
• Two 70" hoses allow fitment in trucks, SUVs and custom installs

How easy is installation and what tools or steps are needed?

Installation is straightforward for anyone comfortable with basic fluid-line work: route the hoses, choose the matching adapter, tighten fittings to recommended torque, and check for leaks under pressure. Because the hoses are flexible and PTFE-lined, they bend into tight paths without kinking, which reduces the need for extra fittings or extensions.

• Hand tools and wrenches to tighten AN and NPT/NPS fittings
• Route hoses away from hot exhaust and moving parts
• Tighten fittings to manufacturer torque specs, then pressure-test
• Trim or reposition with appropriate clamps and brackets as needed

Who is this for? Mechanics, hot-rod builders and owners upgrading or repairing transmission cooling will appreciate this Yunnergo kit. It's intended for anyone who needs long, durable cooler hoses that adapt to multiple thread standards—useful for swaps, remote coolers, retrofits and custom plumbing on cars, trucks and performance builds. The kit supplies the hoses and common adapters you need to get a reliable, leak-resistant transmission cooling install without sourcing separate parts.