Low Pressure Drop Transmission Oil Cooler LPD47391 4739 40,000 GVW with Mounting Hardware (Black)

So far so good. Been installed about a month. Trans temp has lowered by about 40-60 degrees. We will see how long it lasts. Don't use the hose or hose clamps. They feel cheap. Cooler itself feels like decent quality for the price.

I replaced the small factory tow package cooler since my temps were near 200 degrees and would go over 200 degrees pulling my boat. I flipped the bottom bracket around and used a grinder to notch it so I could mount the trans cooler to it (had to slide the cooler to the passenger side a bit to clear the mount for the PS cooler). I used a brake line cutter to cut the factory lines off horizontal, and then used a brake flare tool to slightly flare them. I doubled up on the clamps where the hose connected to the factory lines. On the cooler, I used pipe thread tape around the fittings to ensure no leaks. Pros: seems to be working good. Put about 50 miles on the truck last night on the highway going 80 MPH with the AC running. Temps never got above the halfway mark from 100 to 200 (so I'm guessing that's 150 or 160 degrees). Install took me about 2 hours in my driveway. I used everything included in the kit (had to cut the hose to fit). Cons: fins are really easy to bend. I had to use a small flat blade screwdriver to straighten some of them out after I was done mounting the cooler. Also, the included clamps are cheap. I've got a tiny drip from the return hose where it clamps to the cooler fitting. I'm going to replace that clamp with a clamp from the auto parts store tonight. My advice would be just get 2 packs of small hose clamps from your local auto parts store and use those instead of the included ones. Also that included screws will strip easily at the phillips head. I used a 10mm socket to tighten them. I snapped one off but I guess I didn't drill a large enough pilot hole for it to mount to the bracket on my 2000 Chevy Silverado Z71. I also flushed the transmission while I had the stock cooler off. I used some clear 3/8" hose and ran it into a bucket. I started the truck and while the dark old fluid was coming out I was pouring in new fluid until it was coming out red. Then I installed the cooler, added more fluid, started the truck, and kept adding fluid until it was at the proper level. I think I flushed about 3 gallons (12 quarts) through it to get the dark fluid out. I ended up buying 5 gallons of fluid total (in gallon jugs from Walmart) and I have about a half jug left after the trans was full. If you don't need to flush yours out you won't need as much fluid.

Terrible cooler didn’t even last two months before it starter leaking making a huge mess everywhere. Would not recommend, save your money buy a better one.

I recently had the 700R4 in my 1990 full size Blazer rebuilt. The shop said they flushed out the old trans cooler and lines, but to me they were just raggedy looking, so I decided to replace the lines and cooler to give the rebuilt trans as good of a chance as possible. This cooler was a good price and had good reviews, so I went for it. As you'll see in the pic, it's definitely beefier than the unit that I took off of the truck. I don't know if the previous cooler was OEM, but guessing not since it was held on by those plastic zip thingies. Now for the "fun" part: I expect other squarebody trucks will have the same issue I'm about to describe. This will be GM pickups from '73 to '87 and Blazer/Jimmys up to '91. There is a center supporting bracket that runs smack through the middle of where this cooler needs to go, so you gotta put that thing on a diet. Fortunately the bracket is easy to remove - just one bolt at the top and two at the bottom. Once it's out of the way, just mount the cooler as high up as possible. But watch out for the hood latch - it uses a few inches of space right above the new cooler when the hood is closed. Then just grab the death wheel and chop out a triangle from the bracket to allow clearance for the cooler. Be sure to leave the "lip", since that will need to be bent down and welded to the bracket to give it some structural integrity. Other than that, it's pretty simple stuff. I've taken it on a few test drives and gotten it up to temp, and so far no leaks or other issues. Seems like a good unit, and due to the sheer size of it, plus the larger diameter stainless hoses I added, I expect the trans will be much cooler and happier now.

Bought a camper which we started towing with my 2004 Nissan Armada. However, when we started towing, we noticed the transmission getting hot. After researching, I realized that the factory transmission cooler is not big enough, especially for towing, so I looked into an exterior trans cooler. This one had excellent ratings, so I gave it a shot, and it has been amazing. I disconnected the stock transmission cooler, which is in the radiator and installed this external unit in its place. I am so happy I did. Our trans temp has not been elevated since we put this cooler in. It is well built and appears ready to last for the long haul. Could not be happier.

For the price it's alright. Lasted 2 years before cracking near the threads. Core itself cracked. 2 years and a fraction of the trucools maybe if I braced the lines coming off it would buy more time or just not fail. Metal is brittle. Mounting with dampers or rubber would probably help too. Will buy again to replace because the fabing for the backers is already done

Awesome cooler and perfect fit for my 2022 Chevy Colorado ZR2 duramax. I pull a 3400lb single axle travel trailer all over the country and I used to get transmission temps of 220 on the highway and upwards of 250 when pulling up hills off road with the camper. This cooler brought the highway temps down to 190 and offroad temps down to 212. I installed the cooler BEFORE the radiator to allow the tranmssion to maintain operating temperatures. I also listened to other reviewers and ditch the hose that came with the cooler. I made all AN lines for the cooler and I have absolutely no leaks after a couple weeks of having it installed. Loving it so far!

This cooler dropped the transmission temps down on my wife's 2011 GMC Yukon XL Denali to 140-150 degrees steady in the summer heat. Installation required a little creativity. Watch some of the videos online for installing a 40k transmission cooler and adjust as you see fit. I did try to install this cooler with the original hard lines, but could not bend them without feeling like I was about to kink the line and reduce flow, so I wound up installing the cooler with hoses that I slid over the original hard lines. I did heed the warning of the other reviews and not use the included rubber hose and bought some elsewhere. In further research I saw people recommending to install the fittings facing up, however I have not seen any evidence that this is absolutely necessary, but may do so one day.