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BOXOB Transmission Cooler Adapter Fittings Review: Quick fit for 4L80E front and rear ports

2pcs 4L80E Transmission Cooler Adapter Fittings, Front and Rear Port 6AN Male Flare to 1/4 NPS for LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 LS2 LH6 L92 L76 LS3
4.5
[Complete Fitting Kit]  Includes front and rear adapters plus two rubber O-rings for immediate transmission cooler repair.
[Premium Aluminum Alloy]  High-strength construction resists pressure and corrosion for long-lasting, reliable performance.
[Precision Machined Threads]  Accurate threading ensures secure, leak-free connections under high pressure.
[Easy, Tool-Free Installation]  Quickly fits front and rear ports without extra tools, saving time and effort.
[Compact, Verified Fitment]  Two sizes (rear 5.1x1.35x1.27cm, front 3.4x1.37x1.3cm) for precise compatibility checks.
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Car maintenance parts that supply durable, precision-machined adapters for front and rear 4L80E ports. The included pair and O-rings make workshop swaps less stressful with BOXOB Transmission Cooler Adapter Fittings. Are these the right adapters for a quick, leak-free cooler line repair?

⚡ At a Glance
  • Build Quality: Premium aluminium alloy combined with precision-machined threads and rubber O-rings for robustness
  • Best for: DIY mechanics and workshop technicians needing fast on-spec testing and cooler-line swaps
  • Not ideal for: Users who have not verified exact port measurements or who need guaranteed OEM-spec parts

Two precision-machined aluminium adapter fittings, supplied with two rubber O-rings, are sized for front and rear 4L80E ports. Designed for straightforward installation and to withstand high-pressure cooler line environments.


Secure, leak-resistant connections - with precision-machined threads and rubber O-rings

Threads are machined to tight tolerances to match flare and NPS fittings while rubber O-rings create a compressible seal at the joint. The combination reduces gaps where fluid could escape under pressure.

A reliably tight connection minimises the risk of transmission fluid leaks during operation and testing, helping avoid messy rework.

Durable under pressure - thanks to premium aluminium alloy construction

Aluminium alloy provides a high strength-to-weight ratio and resists deformation under load, suitable for high-pressure transmission cooler environments. The material selection supports repeated install and removal without cracking.

Longer service life and fewer replacements make workshop jobs more dependable, especially when testing or diagnosing cooler-line issues.

Fast workshop swaps - with included pair, distinct lengths and no extra tools required

The set includes a longer rear fitting and a shorter front fitting with specified dimensions, allowing direct replacement of corresponding ports. Install design is straightforward so extra tools are not necessary for most swaps.

Quicker turnaround for repairs and on-spec testing, saving time during diagnostics and reducing vehicle downtime.

✨ The 4 Key Reasons for BOXOB Transmission Cooler Adapter Fittings
  1. Precision-machined threads - Ensures a tight, leak-free seal under transmission cooler pressure.
  2. Premium aluminium alloy - Handles workshop conditions and resists corrosion for longer service life.
  3. Pair with rubber O-rings included - Ready for immediate installation with spare O-rings for secure sealing.
  4. Two distinct lengths for front and rear - Covers both ports so fast testing and accurate replacements are possible.
📋 Technical Details at a Glance
  • Category: Home Improvement - Transmission cooler adapter fittings
  • Material: Premium aluminium alloy
  • Compatible Ports: Front and rear 4L80E transmission ports
  • Connection Type: 6AN male flare to 1/4 NPS
  • Threads: Precision machined threads for secure connection
❓ Frequently Asked Questions

Q: Are both front and rear fittings included?

A: Yes. The package list specifies two transmission adapter fittings for front and rear ports supplied with two rubber O-rings.

Q: What material are the fittings made from?

A: Made from premium aluminium alloy, designed for strength and durability in high-pressure environments.

Q: Do I need special tools to fit them?

A: No extra tools are needed, installation is described as simple and convenient.

🏆 Our Verdict

Suitable for DIY mechanics and workshop technicians who need reliable, quick-fitting adapters for 4L80E cooler ports. Precision-machined threads, premium aluminium construction and included O-rings make for secure, durable connections that speed up testing and repairs. The compact kit delivers practical long-term value by reducing repeat work and downtime.