Should OEM Transmission Cooler of 2012 Honda Odysssey be Bypassed when Installing Derale
Updated 08/10/2026 | Published 08/06/2026
Question:
In the Honda Odyssey install video I noticed that the factory trans cooler was left unhooked when this aftermarket cooler was installed, is that recommended from Derale?
asked by: Brandon S
Expert Reply:
Hey Brandon, this is a great question but the short answer is it "depends". If you had an OEM transmission cooler that was bad and leaked you could just bypass it altogether with an aftermarket controller like the Derale # D13503 that you mentioned. I would say in general though it's best to run the fluid first through the OEM controller and then to the aftermarket one as this gives maximum cooling power. Is your current cooler still functional?
Product Page this Question was Asked From
Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class III - Efficient
- Transmission Coolers
- Plate-Fin Cooler
- Mid-Size Truck
- SUV
- Van
- Standard Mount
- 11W x 8-3/4T x 7/8D Inch
- With 11/32 Inch Hose Barb Inlets
- Derale
more information >
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Brandon S.
8/6/2026
Our current cooler is still functional, I was just looking for some additional cooling for the transmission because we were going to tow our two Jetski with the van. Thank you for the reply ??