1981 C3 Automatic Transmission Cooling Lines TBW 350 T350
Your original 1981 Corvette transmission cooling lines may be hiding internal rust, cracked fittings, or collapsed bends—compromising both cooling efficiency and drivability. This OE-style Tin Bundy Weld (TBW) line set restores proper ATF flow between the radiator and T350 automatic transmission, helping maintain consistent fluid temperatures during operation. Pre-bent to exact factory specifications for 1981 350 small block applications, these steel lines replicate the materials and routing GM used on the assembly line for long-term durability and originality.
Features
• Correct for 1981 C3 Corvettes with 350ci engine and T350 automatic transmission
• Pre-bent tubing matches factory routing along frame and crossmember
• Tin Bundy Weld (TBW) steel lines match OE material and finish
• Provides ATF circulation between radiator and transmission cooler fittings
• Resists corrosion, vibration fatigue, and ethanol-related deterioration
• Installs directly without cutting or modification
Tech Notes
TBW (Tin Bundy Weld) tubing was original equipment on all 1981 Corvette transmission lines. Its brazed construction resists rust from the inside out while offering better flexibility and sealing under clamp and flare pressure.
Because Details Matter
A factory-style transmission line set doesn't just restore cooling—it finishes the job right. This 1981-specific TBW line kit supports proper performance and show-worthy accuracy from the inside out.
Installation Note
Pair with our factory-style line clip set for correct routing and frame support. Use line wrenches, fresh ATF, and a catch pan to simplify installation and minimize mess.
Also known under these part numbers: (For reference only)