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Tyandkate's avatar
Tyandkate
Explorer
Dec 29, 2017

Added transmission cooler (I thought)

I brought my truck in for a oil change and transmission service. While in I decided to have them add a external transmission cooler. So I got the call it was ready. The shop installed a NAPA rapid cool transmission cooler I’ll post a link to it at the bottom of the post here’s my concern.
The cooler was installed in the front of the radiator with a direct path of air. But they bypassed the transmission cooler built in to the radiator. Is this okay or is this going to be a issue while towing? Seeking advice from someone that has more knowledge on the subject. Thanks so much for the advice in advance.

The cooler is 11” wide by 9 1/2” tall 3/4” thick
https://www.napaonline.com/en/p/ATP17510

53 Replies

  • The hot fluid should go to the external after market cooler first, and then to the factory cooler built into the radiator. That way the fluid will be kept at a desirable temperature. The way it is plumbed now, the fluid cold stay way too cold, especially during cold ambient temperatures not towing.
  • MitchF150 wrote:
    Vehicles with OEM trans coolers always have it plumbed thru the rad first, then to the external cooler...

    I'll go with how mine came from the factory.. :)

    Good luck!

    Mitch


    It was my understanding it was going to go in the radiator out then external cooler then back to the transmission.
  • Vehicles with OEM trans coolers always have it plumbed thru the rad first, then to the external cooler...

    I'll go with how mine came from the factory.. :)

    Good luck!

    Mitch