40k Transmission Oil Cooler lpd47391 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler
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Availability:
In Stock.
Arrives
Saturday, Nov 8
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Color: Silver
Features
- [Application and Compatibility] - The LPD47391 40k Transmission Oil Cooler Kit is specifically designed for heavy-duty vehicles. It is capable of handling a maximum gross vehicle weight (GVW) of 40,000 pounds, making it suitable for various types of large commercial trucks, trailers, and towing vehicles.
- [Low Pressure Drop Design] - This cooling kit incorporates advanced low-pressure drop technology, ensuring minimal pressure loss as the transmission oil flows through the cooler. This effectively reduces energy consumption and system pressure, while enhancing the cooling efficiency of the transmission.
- [Includes Mounting Hardware] - The cooler kit comes with a complete set of mounting hardware, including high-quality bolts, fasteners, and brackets. These components are designed to seamlessly match different vehicle types and installation configurations, simplifying the installation process while ensuring reliable and stable mounting.
- [Advanced Cooling Protection] - This cooler kit utilizes advanced cooling technology to maintain the transmission within the proper operating temperature range. Through efficient heat dissipation and effective heat exchange, it prolongs the lifespan of the transmission, reduces the risk of maintenance and failures, and enhances the overall reliability and fuel efficiency of the vehicle.
- [WARRANTY AND AFTER-SALES] - Transmission Oil Cooler provides lifelong warranty service, we have a strong after-sales team, after the purchase of products you have any questions can contact us at any time, to ensure your shopping worry free.
Material: Aluminum
Brand: Gagsu
Package Information: Tubular
Item Weight: 2.84 Kilograms
Recommended Uses For Product: Automotive
Material: Aluminum
Brand: Gagsu
Package Information: Tubular
Item Weight: 2.84 Kilograms
Recommended Uses For Product: Automotive
Item Form: Oil
Manufacturer: Gagsu
Unit Count: 1.0 Count
UPC: 726312342859
SAE J300 Viscosity Grade: 10W-30
Number of Items: 1
Item Weight: 6.24 pounds
Package Dimensions: 25.5 x 10.5 x 2.9 inches
Manufacturer Part Number: LPD47391
Date First Available: February 25, 2021
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Nov 8
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Color: Silver
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.
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Reviewed in the United States on June 8, 2023 by Long2757 Long2757
Color: Silver
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!
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Reviewed in the United States on May 23, 2025 by Charles P. Hill Charles P. Hill
Color: Silver
Works well, Good quality kit. Everything you need to install is included. I put it on a 2004 Yukon 5.3. Alot bigger than OEM unit.
Reviewed in the United States on September 15, 2025 by Rich
Color: Silver
None of these cheap knock off Tru Cool coolers are good. The fitting on the cooler you thread the hose bars into is bigger than the hose barb fittings provided. You can not tighten the fittings down enough to prevent leaking without threads stripping. I have orders three different coolers from different sellers, all with the same issue.
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Reviewed in the United States on July 20, 2025 by Brian S. Cropp
Color: Black
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.
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Reviewed in the United States on July 14, 2025 by AJ Tissier
Color: Silver
Overall good product keeps transmission cool only complaint is it did come with the wrong thread size fittings to thread into the cooler
Reviewed in the United States on October 19, 2025 by Zach Vineyard
Color: Red
anyone looking for a great cheap cooler this is the move…. i’ve been running it for a while now i have a 4l60e. stock believe it or not 300k miles. i also have a stage 3 summit cam. when my truck had the stock cooler i was seeing anywhere from 190-210 degrees. i installed this cooler. i’ve yet to see anything higher than 140 on my vcm scanner with hp tuners. also i highly recommend you get better lines unless you wanna be on the side of the road. the hose failed on me within a month. no problem tho spend the extra money order some steel braided lines you will never have a issue i’ve seen better temps with this cooler than i have with mishimoto coolers.
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Reviewed in the United States on August 30, 2025 by Jesica Ramsey
Color: Silver
Installed it in my 2015 silverado. Despite the bypass valve mod on thermostat, temps can still get in the 200's going up hill in a hot 90F while towing a boat at 75mph. Tested with the cooler installed and so far max temp is around 170F uphill. Flat road, it's around 150F. Without load, it's around 130F. Might disconnect it during winter. ATF may not get up to temperature during winter. For best results, install cooler after stock cooler esp if the stock cooler is part of the radiator. This will also make it easier to quickly disconnect and connect to use stock cooler. So far no leaks. Buy quality hose. The one that comes with this cooler doesn't seem that great.
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Reviewed in the United States on July 11, 2025 by Someone