Enhance Transmission Longevity with a Precision-Engineered Cooler Line Assembly (OE# 1L3Z-18663-AB)
Product Description
The transmission cooler line is one of the most critical yet overlooked components in an automatic transmission system. Designed for models requiring OE# 1L3Z-18663-AB, this assembly plays a pivotal role in maintaining transmission health by circulating fluid between the transmission and the radiator cooler. Unlike generic alternatives, this replacement part replicates OEM engineering to deliver unmatched reliability under extreme pressure and temperature fluctuations
Detailed Applications
| Year | Make | Model | Configuration | Positions | Application Notes |
| 2004 | Ford | F-150 | V6 256 4.2L | Heater Return to Water Pump | |
| 2004 | Ford | F-150 Heritage | V6 256 4.2L | Heater Return to Water Pump | |
| 2003 | Ford | E-150 | V6 256 4.2L | Attaches to Water Pump | |
| 2003 | Ford | E-150 Club Wagon | V6 256 4.2L | Attaches to Water Pump | |
| 2003 | Ford | E-250 | V6 256 4.2L | Heater Outlet | |
| 2003 | Ford | Econoline (Mexico) | V6 256 4.2L | Attaches to Water Pump | |
| 2003 | Ford | F-150 | V6 256 4.2L | Heater Return to Water Pump | |
| 2003 | Ford | Lobo (Mexico) | V6 256 4.2L; Mexico Region | Heater Return to Water Pump | |
| 2002 | Ford | E-150 (Mexico) | V6 256 4.2L | Attaches to Water Pump | |
| 2002 | Ford | E-150 Econoline | V6 256 4.2L | Heater Water Inlet | |
| 2002 | Ford | E-150 Econoline Club Wagon | V6 256 4.2L | Heater Water Inlet | |
| 2002 | Ford | E-250 Econoline | V6 256 4.2L | Heater Outlet | |
| 2002 | Ford | Econoline Wagon | V6 256 4.2L | Attaches to Water Pump | |
| 2002 | Ford | F-150 | V6 256 4.2L | Heater Return to Water Pump | |
| 2002 | Ford | Lobo (Mexico) | V6 256 4.2L; Mexico Region | Heater Return to Water Pump | |
| 2001 | Ford | E-150 Econoline | V6 256 4.2L | Heater Water Inlet | |
| 2001 | Ford | E-150 Econoline Club Wagon | V6 256 4.2L | Heater Water Inlet | |
| 2001 | Ford | E-250 Econoline | V6 256 4.2L | Heater Outlet | |
| 2001 | Ford | Econoline Wagon | V6 256 4.2L | Attaches to Water Pump | |
| 2001 | Ford | F-150 | V6 256 4.2L | Heater Return to Water Pump | |
| 2001 | Ford | Lobo (Mexico) | V6 256 4.2L; Mexico Region | Heater Return to Water Pump | |
| 2000 | Ford | E-250 Econoline | V6 256 4.2L | Heater Outlet; From 12/22/99 | |
| 2000 | Ford | F-150 | V6 256 4.2L | Heater Return to Water Pump |
Why This Cooler Line Assembly Stands Out
Transmission failures often originate from minor leaks or inadequate cooling. The OE# 1L3Z-18663-AB cooler line addresses these issues with the following advanced features:
Robust Multi-Layer Construction
Combines corrosion-resistant steel tubing with high-strength synthetic rubber segments to absorb engine vibrations while resisting abrasion and chemical degradation.
Internally smooth surfaces minimize fluid turbulence, ensuring consistent flow rates and reducing the risk of premature wear in the transmission system.
Leak-Proof Sealing Technology
Features swaged fittings and precision-machined connectors that eliminate weak points at junctions, a common failure area in inferior aftermarket lines.
Compatible with ATF, Dexron, and Mercon fluids without risk of seal deterioration.
Optimized Thermal Performance
Engineered to withstand fluid temperatures exceeding 250°F (121°C), preventing hose softening or cracking under heavy towing or stop-and-go driving conditions.
Plug-and-Play Installation
Pre-bent to match factory routing, including integrated mounting brackets and clip locations. This eliminates the need for custom bending or modification, reducing installation time and error.
Critical Failure Symptoms: When to Replace OE# 1L3Z-18663-AB
Low Transmission Fluid Warning: Sudden drops in fluid level indicate leaks, often traced to cracked lines or loose fittings.
Burnt Fluid Odor: Leaking fluid contacting exhaust components produces a sharp, acrid smell.
Erratic Shifting: Low fluid pressure caused by leaks leads to delayed gear engagement or rough shifting.
Visible Corrosion or Wetness: Inspect lines for rust spots or oily residue, particularly around connectors.
Applications & Cross-Referencing
This assembly is compatible with Ford F-150, Expedition, and Lincoln Navigator models equipped with 4R70W/4R75E transmissions. Always verify fitment using your VIN for accuracy.
Industry-Leading Quality Assurance
Each cooler line undergoes:
Pressure cycling tests up to 400 PSI.
Salt spray corrosion resistance validation.
Dimensional checks against OEM blueprints.
Frequently Asked Questions
Can I reuse original clamps?
We recommend using the provided high-pressure clamps to ensure seal integrity.
Does this assembly include both lines?
Yes, the kit contains the complete return and supply line assembly for full system replacement.
Call to Action:
Don’t let a failing cooler line compromise your transmission. Contact us today for OEM-grade performance, bulk pricing, and technical documentation. Request a sample to validate quality firsthand
Why Partner with NINGBO JIATIAN AUTOMOBILE PIPE CO., LTD.?
As a specialized factory with extensive experience in automotive piping, we offer distinct advantages to our global clients:
OEM Expertise: We focus on producing high-quality replacement parts that meet original equipment specifications.
Competitive Factory Pricing: Benefit from direct manufacturing costs without intermediary markups.
Complete Quality Control: We maintain full control over our production line, from raw material sourcing to final packaging.
Global Export Support: Experienced in handling international logistics, documentation, and shipping for B2B orders.
Flexible Order Quantities: We cater to both large-volume orders and smaller trial orders to build new business relationships.
Frequently Asked Questions (FAQ)
Q1: Are you a factory or a trading company?
A: We are a manufacturing factory (NINGBO JIATIAN AUTOMOBILE PIPE CO., LTD.) with IATF 16949 certification. This means we produce the parts ourselves, ensuring quality control and competitive pricing.
Q2: Do you offer samples for quality verification?
A: Yes, we encourage potential partners to test our product quality. Samples are available for a modest cost. Contact us to arrange a sample order.
Q3: What is your Minimum Order Quantity (MOQ)?
A: We offer flexible MOQs to support new business. For this standard OE part, the MOQ can be as low as 50 pieces. Custom parts may have different requirements.
Q4: What is your typical lead time for production and shipment?
A: For this specific part, we can often ship sample or small orders within 7-10 days. For larger production runs, the standard lead time is 30-35 days after order confirmation and deposit receipt.
