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Review on 🌑️ Derale 15840 Hyper Dual-Cool Remote Cooler: Optimal Temperature Control for Peak Performance by Sean Carter

Revainrating 5 out of 5

20 degrees below Parts

I tow an 11,000 lb fifth wheel with a Ram 04 w/ 5.9 Cummins and a 48RE transmission. The transmission got hot on stop and go and on slow climbs when the torque converter failed to lock up. Installed as an additional cooler. I mounted it on the rear transmission carrier. For my assembly it would be better if the fittings come out at the end and not the sides. I bought swinging elbows to make it easier. I didn't use a thermostat, instead I used a powered auxiliary relay and switch to power the fan. Typically, the cooler on my edge digital sensor lowers the temperature by 20 degrees. As a test, I can run at a temperature and turn on the fan. In a few minutes the temperature drops by 7 degrees. Now I'm very happy.

Pros
  • High efficiency multi-layer plate cooler
Cons
  • Doubtful senior purchase