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2009 Toyota Sienna Combo Transmission & Oil Cooler Recommendation


Could I ask your help - I truly rely on your recommendations: My 2009 Sienna occasionally hauls our 3000lb Coleman popup along with our family of 6. We typically travel long distances. Our Canadian spec Sienna has the towing package which includes a mini-oil cooler in the bottom belly of the radiator. Incidentally we replaced the radiator this year after old one blew.. That oil-cooler is really a transfer cooler. Its. A heavy load on on the van so like my old 2002 Sienna, Id like to keep the fluids cool.


Helpful Expert Reply:

As long as you have room for it, the Derale Combination Transmission and Engine Oil Cooler # D15902 would be an excellent choice to keep your engine oil and transmission fluid cool.

This kit measures 17" Wide x 12-1/2" tall x 3/4" deep, you will want to measure the area in front of your radiator to determine if you have clearance for it. I attached an install video for you to check out as well.

The oil cooler portion of this kit has a thermostat in the sandwich adapter so that your vehicle won't have a hard time warming up. This is especially helpful for you since it sounds like you are from Canada.

helpful expert reply by:
Jameson C

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