AN6 6AN Automatic Transmission Cooler Lines Kit with fittings - Nylon

In this review of the AN6 6AN Automatic Transmission Cooler Lines Kit the bottom line is clear: this kit is best for DIY mechanics and owners of 4L60E/4L65E-equipped vehicles who want a durable, reusable hose solution for cooling lines. The reviewer found the combination of a CPE rubber inner core, 304 steel wire middle braid and nylon outer braid delivers solid durability and resistance to abrasion, while the included -6AN fittings and clamps make assembly possible for someone comfortable with basic transmission plumbing. It is a practical, value-oriented kit with a few fitment caveats to check before buying.

Key Features

• Universal fitment: Designed for compatibility with 4L60E and 4L65E transmission cooler lines, making it suitable for a wide range of GM cars and trucks.
• Durable construction: The hose uses a CPE rubber inner core with a 304 stainless steel braid and nylon outer layer to resist abrasion and hold shape under pressure.
• Complete kit: Includes 15 ft of -6AN hose, straight and 90 degree hose ends, transmission and radiator fittings, and separator clamps so installations can be completed without sourcing extra parts.
• Lightweight fittings: Hose adapters are aluminum alloy, reducing added weight while providing corrosion-resistant connections when installed properly.
• Service support: The brand offers a 3-month warranty and direct contact for issues, which helps if any parts arrive missing or defective.

Who It's For

The kit suits hobbyist mechanics and professional installers working on GM vehicles with 4L60E or 4L65E transmissions who want to replace stock hard lines with a flexible, braided hose solution. It is especially useful for those who need routeable hose, custom lengths, or want to add or replace cooler lines during an overhaul.

Those who should look elsewhere include buyers unwilling to verify the exact fitting type and thread standard before purchase, and anyone who needs OEM-style hard lines rather than a -6AN hose conversion. If ease of use and guaranteed slip-on fit are paramount, factory replacement hard lines may be a better choice.

Pros & Cons

Pros

• Quality materials deliver strong abrasion resistance and long service life when properly installed.
• Includes a full set of -6AN ends, transmission and radiator fittings, and clamps so users do not need multiple suppliers.
• Many customers report easy assembly and no leaks when connections are made correctly.

Cons

• Fitment is mixed across installs; some users report difficulty getting the hose to fit perfectly over certain fittings, so careful checking is required.

Specifications

Product type	Transmission cooler hose kit
Hose length	15 ft
Hose size	-6AN
Hose construction	CPE rubber core, 304 steel braid, nylon outer braid
Fittings included	Straight and 90 degree -6AN ends, 1/4" NPSM to -6, 1/4" NPT to -6
Clamps	2x separator hose clamps
Warranty	3-month warranty

Our Verdict

The AN6 6AN cooler lines kit is a sensible upgrade for mechanics and enthusiasts replacing 4L60E/4L65E lines who want a durable, routeable -6AN solution with everything included. It delivers solid build quality and leak resistance when installed correctly, but buyers should verify thread types and fit before cutting hose to length to avoid fitment headaches.

Frequently Asked Questions

Will this fit my 4L60E transmission?
It is designed for 4L60E and 4L65E applications, but you should compare the pictured fittings and thread types to your vehicle before installing.

Are the hoses leak resistant out of the box?
Many users report no leaks when assembled correctly; proper tightening and inspection of O rings and threads prevents leaks.

What material are the fittings made from?
The hose adapters are high-performance aluminum alloy and the hose braid includes 304 stainless steel.