Boltigen 3/8" ID Transmission Oil Cooler Hose 10FT — SAE J1532, 300 PSI Working Pressure

Boltigen 3/8" ID Transmission Oil Cooler Hose is a 10-foot, SAE J1532-compliant cooler line built with a polyester braid and CPE outer layer to handle transmission, hydraulic, and power steering fluids reliably at up to 300 PSI working pressure.

This transmission oil cooler hose is engineered for technicians, DIY mechanics, and equipment owners who need a durable, flexible line that resists oil, abrasion, and harsh temperatures. With a 3/8" (9.5 mm) inner diameter and a robust construction rated from -40°F to +302°F, it replaces worn or leaking cooler lines and performs in demanding automotive, industrial, and off-road applications.

How does this hose stand up to pressure and temperature extremes?

The Boltigen cooler hose is rated with a 300 PSI working pressure and a 1800 PSI burst pressure, providing a wide safety margin for most transmission and hydraulic systems. Its materials and construction sustain performance across a broad temperature range so the line won’t harden or delaminate under seasonal stress.

• 300 PSI maximum continuous working pressure.
• 1800 PSI burst pressure for safety under spikes.
• Operates from -40°F to +302°F without loss of integrity.
• Polyester braid core for pressure support and flexibility.

What fluids and systems is the hose compatible with?

This line is suitable for transmission fluid, engine oil, power steering fluid, hydraulic fluids, and many lubricants. It’s also compatible with gasoline in non-ethanol applications, making it versatile for vehicles and industrial machinery that use mixed fluid systems.

• Designed for transmission oil cooler circuits and hydraulic return lines.
• Compatible with most transmission and power steering fluids.
• Able to carry certain gasoline types where specified.
• Commonly used in automotive repairs, off-road gear, and industrial equipment.

How is this hose constructed and why does that matter?

Boltigen combines a polyester braid inner layer with a CPE (chlorinated polyethylene) outer cover to deliver abrasion and oil resistance while maintaining flexibility. That layered design provides strength for pressure handling and a protective skin to resist environmental damage, reducing the chance of premature failure.

• Inner polyester braid reinforces pressure control and flexibility.
• CPE outer layer resists oil, ozone, abrasion, and weathering.
• Smooth inner bore for consistent fluid flow and minimal turbulence.
• Manufactured to SAE J1532 standards for cooler hose performance.

How do I install and size this 10-foot hose for my vehicle?

Measure the required routing length between the cooler and transmission or steering unit, allowing a little extra for bends and clamps. Use appropriate fittings for a 3/8" inner-diameter hose, secure with quality clamps or crimp fittings, and inspect for clearance from heat and moving parts once installed.

• Inner diameter: 3/8" (9.5 mm); outer diameter: 0.67" (16.5 mm).
• Length: 10 feet—cut to fit, leaving routing slack for bends.
• Use SAE-compatible fittings and clamps for secure connections.
• Check fittings and hose routing for chafe, heat, and pinch points.

Who is this for: Boltigen’s 3/8" ID Transmission Oil Cooler Hose is intended for mechanics, restoration shops, fleet maintenance teams, and vehicle owners who need a dependable replacement or upgrade hose for transmission coolers, power steering circuits, and hydraulic return lines. If you require a line that meets SAE J1532 standards, resists oil and environmental damage, and performs across wide temperature ranges, this 10-foot hose provides a practical, professional-grade solution for repairs and custom installations.