Motorad Automatic Transmission Oil Cooler Assembly

Automatic transmission fluid works best within a fairly narrow temperature window. Run it too hot and it oxidizes and loses lubricating ability, and too cold and it flows sluggishly and shifts poorly. Motorad's Automatic Transmission Oil Cooler Assembly offering is built around that challenge, drawing on the company's long background in thermal management hardware.

Thermal Management Heritage Applied to Transmission Cooling

Motorad was established in 1958 and grew from a die-making business into a specialist in engine thermostats. It became a Tier 1 OEM supplier in 1995, developing thermal management solutions directly for vehicle manufacturers. That heritage matters in the transmission cooling circuit, where precise temperature-sensitive valves and compact, well-sealed assemblies determine whether fluid reaches the cooler at the right moment. Motorad's transmission oil cooler components are described as manufactured with OEM-quality materials by an OE supplier, to OEM specifications and processes.

What to Expect from Motorad's Transmission Cooler Components

Within this category, Motorad is best known for thermostatic control components that regulate fluid flow between the transmission and its cooler. These are typically specified by the temperature at which they open. Examples include 167°F and 176°F designs, and they are matched to specific vehicle applications, such as European models from BMW, Volkswagen and Audi. Construction commonly combines steel and copper, and in some designs plastic, in a direct-fit format with two ports. Some part numbers include seals, while others do not, so checking the listing details before installation is worthwhile.

• Application-specific design: each part is engineered around a particular vehicle family's plumbing and opening temperature.
• OE-supplier manufacturing: built to meet or exceed original equipment specifications.
• Warranty coverage: select Motorad transmission oil cooler thermostats carry a 12-month limited warranty.

Why Opening Temperature and Fitment Matter

A transmission cooler thermostat that opens too early can keep fluid cooler than intended, slowing warm-up and efficiency, while one that sticks closed can allow fluid temperatures to climb under towing or heavy stop-and-go driving. Matching the opening temperature, port layout and sealing method to your vehicle is the most important step when choosing a replacement. It is also wise to inspect the cooler lines, fittings and fluid condition whenever you service this part, since contamination or leaks elsewhere in the circuit can undermine a new component.

Explore More

Motorad's reputation across the cooling system, from thermostats to caps and sensors, is covered on the Motorad brand page. If you want to compare approaches from other manufacturers, browse the full Automatic Transmission Oil Cooler Assembly category to see how different brands handle design, materials and fitment.