Shop By Category
Your Cart

99-03 Ford 7.3L Powerstroke CNC Fabrication 4R100 Transmission Cooler Line Kit (3/8" Barbs)


1999-2003 7.3L Powerstroke ( With Factory Trans Cooler)

Replace your rusted early 99-03 7.3L Ford Powerstroke transmissions lines with an upgraded CNC Fabrication stainless steel line kit.

This kit is to replace your factory 4R100 transmission cooler lines with 3/8 inch hose barbs to match the factory transmission cooler ports.


If you need transmission hose, we recommend the Gates 27059 as that hose works very well with Parker PushLok barb fittings.

Please be mindful that these lines are one piece, 60 inch long, and there is a chance they may get slightly bent by the shipping company. This tubing is extremely durable and can easily be bent back into shape.

If you have already installed a 6.0L Powerstroke transmission cooler with the 1/2 inch ports, then purchase part number 425107

We recommend by-passing or removing the lines going to the bottom of the radiator. When the heat exchanger inside the radiator fails, it will send coolant into your transmission and will cause the transmission and torque converter to fail.

It is not year specific on whether Ford had the ports in the radiator as we have seen on many years of truck in the shop not have them.


  • Fits Early 99 through 2003 7.3L with the 4R100 Transmission
  • Domestic 304 seamless tubing stainless steel
  • Made In-House on our 3 axis CNC tubing bender
  • 3/8 inch barbs fitting to match the factory cooler
  • Genuine Brennan and Parker fittings
  • Includes mounting bracket

CNC Fab: 425007

Lame California Prop 65 Notice