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Derale Transmission Cooler Recommendations for a 2005 Toyota Sienna  


I have 2005 Sienna and Im planning a trip with towing 6/10 enclosed cargo trailer the towing capacity of the van is 3500 lb,the gvwr of the trailer is 2800lb do I need to install additional trans cooler van has towing package on it which including stronger alternator and transmission cooler original manufacture TOYOTA and if so wich one do I need thank you very much


Expert Reply:

In most cases the factory transmission cooler in a vehicle is adequate at best. I would recommend you install a transmission cooler such as the Transmission Cooler # D13501 that you referenced on your 2005 Toyota Sienna.

You will want to do some measuring to see what will fit in front of your radiator but in most cases you will want to go with the biggest transmission cooler you can fit there. If possible I would put a Derale Transmission Cooler, part # D13504. This cooler measures 11 inches in width and 12 inches in height.

I would recommend that you run both your factory transmission cooler and this Derale Transmission Cooler, part # D13504.

I would run the output line from the factory cooler to the input of the # D13504 and then the output back to the transmission. If you route the coolers in that order you will optimize the cooling efficiency of the coolers.

I attached an FAQ article transmission coolers below for you to check out also.

expert reply by:
Jameson C

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