Product Description
CNC Fabrication 425107 98.5-03 7.3L 4R100 Transmission Cooler Line Kit w/ 1/2 Inch Barbs
The CNC Fabrication 425107 4R100 Transmission Cooler Line Kit is a premium stainless steel replacement for the factory transmission cooler lines found on 1999-2003 Ford 7.3L Power Stroke trucks equipped with the 4R100 automatic transmission. Designed specifically for trucks already upgraded to a 6.0L Power Stroke transmission cooler with 1/2-inch ports, this kit eliminates rust-prone factory lines while providing improved durability and long-term reliability.
Manufactured in-house using domestic 304 seamless stainless steel tubing and precision CNC bending technology, the CNC Fabrication 425107 kit delivers an exact-fit solution for high-mileage, towing, and performance-oriented Power Stroke applications. Featuring genuine Brennan and Parker fittings along with 1/2-inch hose barb connections, this kit is engineered to work seamlessly with upgraded 6.0L transmission cooler installations.
Features
- Direct replacement for factory 4R100 transmission cooler lines
- Designed for trucks using a 6.0L Power Stroke transmission cooler
- 1/2-inch hose barb fittings for 6.0L cooler compatibility
- Constructed from domestic 304 seamless stainless steel tubing
- Precision CNC bent for accurate fitment
- Manufactured in-house by CNC Fabrication
- Includes genuine Brennan and Parker fittings
- Corrosion-resistant stainless steel construction
- Includes mounting bracket
- Ideal for towing, daily driving, and performance applications
- Designed specifically for Ford Power Stroke trucks
Fitment
- 1999 Ford F-Series 7.3L Power Stroke with 4R100 transmission
- 2000 Ford F-Series 7.3L Power Stroke with 4R100 transmission
- 2001 Ford F-Series 7.3L Power Stroke with 4R100 transmission
- 2002 Ford F-Series 7.3L Power Stroke with 4R100 transmission
- 2003 Ford F-Series 7.3L Power Stroke with 4R100 transmission
- Vehicles equipped with a 6.0L Power Stroke transmission cooler featuring 1/2-inch ports
Note: This kit is intended for trucks already upgraded to a 6.0L Power Stroke transmission cooler with 1/2-inch ports. If your truck still uses the factory transmission cooler, CNC Fabrication recommends part number 425007 with 3/8-inch fittings. Transmission hose is not included. CNC Fabrication recommends Gates 27066 transmission hose for use with Parker Push-Lok style fittings.
What's Included
- (2) CNC Bent Stainless Steel Transmission Cooler Lines
- 1/2-Inch Hose Barb Fittings
- Genuine Brennan and Parker Fittings
- Mounting Bracket
Specifications
- Manufacturer: CNC Fabrication
- Part Number: 425107
- Application: Transmission Cooler Line Replacement Kit
- Vehicle Compatibility: 1999-2003 Ford 7.3L Power Stroke
- Transmission Compatibility: 4R100 Automatic Transmission
- Cooler Compatibility: 6.0L Power Stroke Transmission Cooler
- Cooler Port Size: 1/2 Inch
- Tubing Material: Domestic 304 Seamless Stainless Steel
- Manufacturing Process: CNC Bent In-House
- Fitting Brands: Genuine Brennan and Parker
- Mounting Hardware: Mounting Bracket Included
- Corrosion Resistance: Stainless Steel Construction
- Installation Type: Direct Replacement
Cross Reference Numbers
425107, CNC425107, 4R100 Transmission Cooler Line Kit, 7.3 Power Stroke Cooler Line Kit, 6.0 Cooler Conversion Lines, 425007
FAQ
Will this fit a stock transmission cooler?
No. The CNC Fabrication 425107 is designed specifically for trucks already upgraded to a 6.0L Power Stroke transmission cooler equipped with 1/2-inch ports.
Does this kit include transmission hose?
No. Transmission hose is sold separately. CNC Fabrication recommends Gates 27066 transmission hose for use with Parker Push-Lok style fittings.
Why upgrade to stainless steel transmission cooler lines?
Stainless steel lines provide superior corrosion resistance and durability compared to factory steel lines, making them ideal for high-mileage trucks, towing applications, and harsh environments.
Does this kit include fittings?
Yes. Genuine Brennan and Parker fittings are included along with the required 1/2-inch hose barb connections.
Should I keep the transmission cooler integrated into the radiator?
Many owners choose to bypass or remove the radiator heat exchanger because an internal radiator failure can allow coolant contamination of the transmission fluid, potentially causing transmission and torque converter damage.
Can shipping bend the lines?
The lines are approximately 60 inches long and may occasionally experience minor shipping-related bends. The heavy-duty stainless steel tubing can typically be carefully straightened if necessary.
