The round tube design is the strongest and most reliable cooler design. What is the difference between an Ultra-Cool and Rapid-Cool transmission coolers?Īnswer: Ultra-Cool is a tube and fin (serpentine) design that is a time proven cost effective design. It is critical in extreme cold conditions to use the original equipment cooler in series with an auxiliary or by-pass cooler and allow the vehicle to warm up before driving. The use of synthetic ATF fluids is recommended where its viscosity at cold temperatures is lower than petroleum based ATF fluids. As the transmission fluid (ATF) falls below 32☏, its viscosity becomes significantly higher, restricting where it can flow to lubricate the internal components of a transmission, leading to premature wear. The viscosity of transmission fluid changes and gets more viscous at lower temperatures. The ideal operating temperature for a transmission is 180☏. Metal components contract as they get colder which results in component mates loosening up, parts wearing quicker due to friction from reduction in clearances between components, and can develop leaks from shrinkage and hardening of seals and gaskets. Some transmission problems really are unique to the cold weather while others get worse. Installing the cooler before the radiator will still provide additional cooling and may be necessary in some difficult-to-access applications.Ĭan you over cool the transmission fluid? Should the cooler be installed before or after the radiator?Īnswer: We recommend installing the auxiliary cooler after the radiator to return the coolest fluid directly to the transmission. In most installations we recommend use of the radiator tank cooler to provide maximum cooling and to comply with most manufacturers warranties. Always choose one of the larger Hayden coolers when eliminating the radiator cooler to compensate for the loss of cooling from the radiator. Can I use a Hayden transmission cooler to eliminate it?Īnswer: Yes. The transmission cooler in the radiator is leaking and is expensive to repair.
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