Transmission Cooler Adapter Fittings – 6AN to 1/4" NPSM | Fits GM & Ford Transmissions | TH400 / TH350 / 4L60E / 4L80E / AOD / C5 / 4R70W | 2PCS + O-Rings

Transmission Cooler Adapter Fittings – GM & Ford Applications

This 6AN to 1/4" NPSM adapter set replaces factory quick-disconnect transmission cooler fittings, allowing the use of custom braided AN lines. Ideal for performance builds or transmission swaps.

Key Features

• Thread: -6AN male flare to 1/4" NPSM (O.D. .516")
• Material: CNC-machined aerospace-grade aluminum
• Finish: Anodized – corrosion & heat resistant
• Includes: 2 adapter fittings + 2 high-temp O-rings
• Function: Enables custom transmission cooler lines using AN fittings

Fitment Compatibility

• GM Transmissions: TH350, TH400, 4L60E, 4L70E, 700R4, 200-4R, TR6060
• Ford Transmissions: AOD, C5, 4R70W, 4R100
• Note: Fits front & rear case holes up to 2007. For 1996+ 4L80E rear fitting, use alternate part# 551124

Installation Notes

• Remove factory cooler line fittings
• Apply PTFE tape or thread sealant to NPSM threads
• Torque to spec and connect -6AN hose ends

OEM Reference

• Manufacturer Part#: 551114
• UPC: 730792484763

Shipping & Warranty

• Free shipping within USA
• Estimated delivery: Tue, Sep 30 – Fri, Oct 3
• 30-day return policy
• 2-year product guarantee