Hot Rod AN LLC
Transmission Adapter Fittings to AN male for cooler lines
Transmission Adapter Fittings to AN male for cooler lines
SKU:sku-43592970043462
Low stock: 4 left
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Transmission Adapter Fittings to AN — Sold as a Pair
Convert factory transmission cooler ports to clean, serviceable AN male for braided PTFE AN lines. These adapters use 1/4-18 NPSM straight thread and seal at the case seat/washer (not the threads) for a durable, leak-resistant interface in high-heat ATF service.
What’s included
- 2 × transmission adapter fittings (pair) — choose AN-6 or AN-8
- 2 × sealing washers — the washer/seat does the sealing (threads do not)
For 4L70E/4L80E/4L85E: the rear port requires the long/nipple adapter to reach the internal seat. The front port is standard depth. Use the selector above to match your case.
Choose your transmission & case port
| Transmission | Case Port Thread / Depth | AN Male Options | Notes |
|---|---|---|---|
| Ford C5 / AOD / AODE / 4R70W | 1/4-18 NPSM • standard depth | AN-6 or AN-8 | Threads do not seal; washer/seat does |
| Ford E4OD / 4R100 | 1/4-18 NPSM • standard depth | AN-6 or AN-8 | Common retrofit to AN lines |
| GM TH350 / TH400 | 1/4-18 NPSM • standard depth | AN-6 or AN-8 | Standard GM case thread |
| GM 200-4R | 1/4-18 NPSM • standard depth | AN-6 or AN-8 | Common retrofit to AN lines |
| GM 700R4 / 4L60E / 4L65E | 1/4-18 NPSM • standard depth | AN-6 or AN-8 | Standard-depth front & rear ports |
| GM 4L70E | 1/4-18 NPSM • rear port requires long/nipple | AN-6 or AN-8 | Front port standard depth; rear uses long/nipple for seat reach |
| GM 4L80E / 4L85E | 1/4-18 NPSM • rear port requires long/nipple | AN-6 or AN-8 | Rear port is deep/stepped; long nose reaches internal seat |
| GM Powerglide (select cases) | 1/4-18 NPSM or 1/4-18 NPT (case-dependent) | AN-6 | Verify NPSM vs NPT before ordering |
| GM 6L80E / 6L90E / 8L90E | OE thermostat block retained or replaced | AN-6 or AN-8 (via adapter block) | Retain OE block or install an AN adapter block |
Note: Year/casting can vary. Always verify your port depth and choose the long/nipple option where specified.
- Direct conversion: thread into the case and transition to AN in one move—no stacks of fittings.
- PTFE compatible: pairs with Hot Rod AN PTFE hose & ends for ATF heat and chemical resistance.
- Flow-smart sizing: AN-6 suits most builds; upsize to AN-8 for heavy towing/high-HP cooler circuits.
- CNC-machined, anodized aluminum: durable finish—use aluminum AN wrenches to protect it.
- NPSM ports: sealing occurs at the seat/washer—no thread sealant on NPSM threads.
- 4L70E / 4L80E / 4L85E: rear port requires long/nipple; front port is standard depth.
- Tighten to seal: snug until the washer contacts, then add ~1/8 turn; re-check after first heat cycle.
- Route lines away from headers/exhaust. Use isolator clamps to prevent vibration wear.
- PTFE hose tip: wrap the cut area tightly with tape before shearing; remove tape after seating the olive/ferrule. See our install guide.
Important: For transmission cooler circuits. Not for brake or power steering systems.
Specs
| Case side | 1/4-18 NPSM (straight) — seal at seat/washer |
| Line side | AN-6 or AN-8 male (37° flare) |
| Includes | Sealing washers (2) |
| Material/finish | CNC-machined aluminum, anodized |
| Primary use | Transmission cooler lines (ATF) |
Lifetime Warranty on adapter fittings
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Shipping & Returns
Shipping & Returns
Most items can be returned within 30 days.
