How to install an Aftermarket 3.7l F150 Transmission Cooler

We install a transmission cooler on a 3.7l F-150. This truck pulls a travel trailer fairly often and without the factory transmission cooler we had to add the much needed cooling capacity.

[@uconwardfamily7502]

Good info. My install used 1/2x3/8 fitting to connect into hose.

[@andysapora3419]

Where do you buy the Hayden cooler that specifically has the bypass feature. Amazon has a few Hayden coolers listed but it doesn’t say anything conclusive about the bypass.
At least not that I could see. Am I missing something? Also, what’s the worst that will happen if I over cool? (1999 f150 used yo have a trans cooler but mechanic bypassed it to dave me money. Trying to make it tow ready again and want to make sure I’m not overheating it)

[@jeremsgarage]

Hi Andy, the Hayden itself doesn’t have one built in but you can purchase a dedicated bypass valve. I ran a Hayden on my Tahoe without the bypass and had no issues. But we only get below freezing a few weeks out of the year.
My preferred brand is B&M which has the bypass built in.
Here is an affiliate link to the b&m cooler I used on my old 1997 F-150 that has the self regulating feature.
amzn.to/3F6OgWt
The Hayden cooler was available locally through my local O’Riley’s.
As for overcooling, in the winter it can cause an issue if it gets very cold where you live. You really want your transmission to get up to 150° or so to cook off any moisture. If you go with a Hayden what you could do is simply cover the cooler in the winter with a heavy flame resistant material to keep the cooler from over cooling. Think of those covers that they put on the front of Semi trucks radiators in the winter for an idea of what I’m talking about.
Most of the south will not get that cold for that long to worry much about it much. It really depends on where you live.

[@andysapora3419]

@@jeremsgarage Thanks! I am in mid atlantic so sometimes it gets cold but not all the time and never for long stretches. Maybe I'll just try the cover-it-up idea and stick with the much cheaper cooler that's already been delivered. The way the truck is, there's no point in spending the deluxe money on it lol.

[@errolfogarty7357]

Good job! Thank you for the video. Im going to duplicate your set up. Just a quick question-- how is the truck performing after the install, any issues?

[@jeremsgarage]

Hi! I know this is an old comment but I somehow missed it. I just talked to my friend and it’s running great still!

[@SlyC00p3r]

Why didn't you buy the transmission cooler that fits in that truck? You have the clips for it. At the very least no drilling into random spots and if you need to take it in to service mechanics will think it's normal. Mishimoto sells a cooler that's bigger and better looking that would fit.

[@jeremsgarage]

I probably would have if it was mine. Budget was an issue and this truck has 170k on it. The cooler is still working great!

[@scottpetrowski3397]

I can't for the life of me get those fittings into the lines no,matter how much I heat them

[@jeremsgarage]

It took a lot of heat and a lot of ugga's but it eventually went on. Thousands of miles and tows later the transmission and cooler are still doing great!