1970-1974 C3 350 Automatic Trans TBW Cooling Lines Short Fuel Pump
If your original transmission cooler lines are rusted, kinked, or no longer sealing correctly, it's time to restore both function and originality with this OE-style Tin Bundy Weld (TBW) line set. Designed specifically for 1970–1974 Corvettes equipped with a 350 small block and short-style fuel pump, this line kit is pre-bent to factory specifications and routes cleanly from the radiator to the transmission. Whether you're running a T350 or T400 automatic transmission, these lines deliver accurate routing, reliable transmission cooling, and a correct underbody appearance.
Features
• Correct for 1970–1974 C3 Corvettes with 350 small block and short fuel pump
• Fits automatic transmissions: T350 and T400
• Tin Bundy Weld (TBW) tubing matches original GM construction
• Restores routing from radiator to transmission
• Maintains proper transmission fluid circulation and cooling
• Pre-bent to factory specs for a direct, bolt-in installation
• Steel lines resist corrosion and fatigue
Tech Notes
GM used Tin Bundy Weld (TBW) tubing as original equipment on Corvette transmission and fuel systems. The brazed seam construction improves internal smoothness and corrosion resistance while reducing vibration fatigue—especially important for tight routing around the short fuel pump on small block cars.
Because Details Matter
This isn’t just a replacement—it’s the line GM meant to be there. With correct routing and materials, you’ll preserve underhood originality and drivetrain performance in one smart move.
Installation Note
For secure routing and original appearance, we recommend installing this line set with our factory-style transmission line clips. Also be sure to have line wrenches, fresh ATF, and a catch pan ready for the job.
Also known under these part numbers: (For reference only)