40k Transmission Oil Cooler lpd47391 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler
Condition: New
Buy Now, Pay Later
As low as
$11.66
/ mo
Learn more
- – 6-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Sunday, May 3
Recently Viewed
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: Tube
Item Weight: 2.84 Kilograms
Recommended Uses For Product: Automotive
Brand Name: Gagsu
Recommended Uses For Product: Automotive
Item Form: Oil
Manufacturer: Gagsu
UPC: 726312342859
Included Components: LPD47391
Unit Count: 1.0 Count
Warranty Description: 3 years
Container Type: Tube
Item Weight: 2.84 Kilograms
Material: Aluminum
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, May 3
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.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Works great on my GMC van keeps the transmission cool very easy to install
Reviewed in the United States on February 24, 2026 by David Morales
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.
...
show more
Reviewed in the United States on June 8, 2023 by Long2757
Color: Silver
Installed this on my 2014 Silverado V6. My transmission temps went from 190-210 down to 140 max. Definitely dropped the trans temp. I highly recommend.
Reviewed in the United States on February 18, 2026 by Maria-Noelle Pope
Color: Silver
DO NOT BUY THIS TRANS COOLER! I had a brand new transmission put into a Yukon Denali built with bigger valves billet transfer case the works cost about 4700 bucks. I figured I’m going all out. Mines as well. Put a big transmission cooler on it. Worst mistake I ever made. Drove to Florida and back from North Carolina and on the way home the cooler developed a leak in the casting draining the transmission fluid completely burnt up a brand new transmission. This thing looks nice, but it is complete junk. Don’t waste your money on this garbage. Seriously buy a good one or you will be stranded.
...
show more
Reviewed in the United States on March 30, 2026 by blooberd
Color: Silver
Got this after seeing the test video on the Half Fixed Garage YouTube channel. The cooler was tested by itself with integrated radiator cooler bypassed. Temperature sensors before AND after the cooler. Fluid cooling of 30-40 degrees while driving and almost 50-60 degrees of cooling at stop lights. Tested in a duramax with Allison trans.
...
show more
Reviewed in the United States on October 27, 2025 by Booner
Color: Silver
Works great just DO NOT and i repeat DO NOT USE THE RUBBER HOSES. Will leave you stranded or worse, burnt 4l60 and no one likes that! GET YA SOME BIG THICK GORILLA LINES AND SHE GOOD TO GO HOSS
Reviewed in the United States on March 5, 2026 by Bryce
Great cooler but crappy hose. Would recommend getting a stainless steel braided hose and fittings to make it more reliable. I blew the hose after one day. The fittings held but the actual hose failed.
Reviewed in the United States on August 26, 2025 by Austin
Color: Silver
I have really heavy wheels and a 7 inch lift. This caused a lot of heat build up to my transmission with temps going past 230 with regular driving & go up to 246 with freeway driving (had hard shifts when temps reached around 210) After installing this cooler with some very aggressive driving on the freeway, temps did not exceed 164. With normal driving temps did not go past 156. The shifts were buttery smooth and the truck would go into overdrives ALOT more smoothly. I did prefill the cooler and hoses with Lucas transmission conditioner instead of using regular atf fluid. Install is so easy with the parts and tools. P.S. I bought my own hose clamps, high quality transmission hose and self drilling screws with high temp gasket maker on the threads on the cooler. & radiator adapter part number 357 (brand starts with an H) Chevy transmission temps should not exceed 190 degrees while driving normally like on road trips. Driving hard for short burst should not go over 210 (showing off) and towing heaving loads should not go over 220. I’m curious how these lower temps are gonna benefit me or not in the long run. I was told that with my heavy wheels plus lift made my truck act as if it was towing full time.
...
show more
Reviewed in the United States on June 30, 2024 by Miguel Gallegos