40k Transmission Oil Cooler LPD47391, Heavy Duty 40,000 GVW Max, Low Pressure Drop, Compatible with Tru-Cool,Includes Mounting Hardware-Ideal for Heavy Vehicles,40,000 GVW transmission cooler (black)

Had this trans cooler on my truck for at least 6 months now and it has not given my a sing issue. The install was simple. I installed this on my 99 Silverado for my built 4l60e and have seen my trans temps stay low even after doing hard pulls. Amazing price and quality

It was really hot. We were stuck in a tunnel in Boston. Boston is hell at rush hour. We knew this...we went anyway. We were hauling a big trailer with a 1985 Chevy pick up. It's old. We're old too. We knew it was a lot to ask of this truck, so installed this transmission cooler. The truck didn't over heat! We didn't have to run the heater on a 90 degree day in the tunnel! It still was a horrible trip, but at least made less horrible by a GREAT transmission cooler! On the way home to Maine we avoided Boston, we swung by the White Mountains, and again, the cooler worked great, hauling up those big hills in the White Mountains it performed flawlessly! We would highly recommend!!

I gave it a shot even though the reviews stated the facts.it was installed on my Chevy base RV with supplied hoses. First the hose leaked on me not once but twice. Upon replacing you could see the poor quality of the supplied hose compared to a gates transmission cooler line. Cost me 1 gallon of fluid each leak, good thing I didn’t take my transmission out. On the third leak is the actually cooler leaking. I have used these 40 k coolers from summit that are branded so in conclusion it will cost you more going this cheap route, don’t do it. I know some of you have success and others don’t. I used these Amazon coolers on this Rv and on a jeep. Going to swap them back to tru-cool 40k which I have on my gmc for the last 10 years without issues. I also feel like the fins are very cheap, over all cheap compared to the actual tru-cool.

I had my doubts buying this but it has proved me wrong. Cools very well and has held up good for about 2 months in

Perfect after-market fit for my 2007 Hummer H2. Well-made and came with all fittings and hardware for a seamless installation in less than an hour.

Bought for multiple trucks and works really good for all uses towing or driving my truck never gets over 140 driving around and never past 165 towing heavy...2015 Chevy 2500hd

Do not use the line provided. Broke twice and caused a fire.

I really liked the cooler itself. It did the trick in reducing my trans temps in my motorhome. After seeing other reviews, I decided to avoid the use of the included hose (which was too short to do much with anyway) - and built myself 3/8 lines with 5/8-18 inverted flare nuts. Those fit fine - but do take a bit of work to get them to seal (that may be an artifact of my flares and not the cooler itself). The only negative I found on the cooler is that it is a pretty soft material - be careful when tightening the inverted flare nuts into the cooler - the attachment female portion bends easily.