Tru-Cool Max Transmission Cooler 40,000 GVW Fluid Oil 40K True Long Brand 4739-1 LPD47391 Automatic

OPT Product Code: LNG-47391
UPC Code: 621859473915
$149.05
(4.9) Reviews: 55
Tru-Cool Max Transmission Cooler 40,000 GVW Fluid Oil 40K True Long Brand 4739-1 LPD47391 Automatic

Product Details


Tru-Cool Max transmission cooler by Long Manufacturing.

Part numbers: LPD47391, 750-47391P5, OC-47391, OC-4739-1, LPD-47391

  • Brand: Tru-Cool by Long Manufacturing – Dana Corporation
  • GVW Rating: 40,000 GVW
  • BTU Rating: 45,000
  • Cooler size: 8.5" x 22.75" x 1.25"
  • Number of plates: 13
  • Fitting size: 3/8" inverted flare
  • Country of Manufacture: Canada
  • Genuine: Yes
  • Manufacturer Warranty: Limited lifetime
  • Tru-Cool is a registered trademark of Dana Aftermarket Group
  • UPC: 621859473915
  • Other Identifiers: 0621859473915, B0060NKA1U

There is only one genuine and authentic Tru-Cool, manufactured with pride in Canada by Long Manufacturing, a division of Dana Corporation. Tru-cool is an OE manufacturer and the only true producer of low pressure drop automatic auxiliary transmission coolers, also known as LPD. Don’t be fooled by the imitations.

This is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing, towing, and hauling. Heat is what kills an automatic transmission. If you want to extend the life of your transmission and avoid a premature, costly rebuild, this is very cheap insurance. Built to OEM specifications, this cooler is the best choice for your truck, van, RV, car.

All parts and instructions are included to mount and plumb this cooler. If you want to install this cooler with upgraded hose and fittings, the 5/8”-18 threads in the cooler would allow you to convert over to AN style to use with braided or Socketless hose. Upgraded line and fittings would need to be purchased separately.  

Retail price is $200+.

All True-Cool coolers come with a manufacturer's limited lifetime warranty.

(Purchase Part number LNG-4739 for this same cooler with the thermal-bypass.)

Tru-Cool Max Transmission Cooler 40,000 GVW Fluid Oil 40K True Long Brand 4739-1 LPD47391 Automatic

OPT Product Code: LNG-47391
UPC Code: 621859473915
$149.05

(4.9) Reviews: 55
179 In Stock
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Silverado 2500HD
Tru Cool Max, This is a really nice unit. Well built and a whole lot bigger that the GM unit the truck came with. I bought one off Anazon, returned it POS. it was not a True Cool even though the add said it was. This is the real deal and the quality really shows. Very happy with the unit and the transmission runs way cooler.
Jim D
07/12/2024
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Authentic Trans Saver
Dropped temps by 35 degrees on my 2011 Silverado vs the factory aux trans cooler.
Jake
06/27/2024
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TruCool Max-by DANA
I shopped the web looking for someone to trust. When buying this transmission cooler OPT did not disappoint a undamaged Tru-cool Max in the Blue DANA box arrived within days. Not a china counterfeit knock off. Thank you!
Dale
05/31/2024
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40k max
Really nice transmission cooler. Way bigger than the stock gm cooler.
M Katz
04/12/2024
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Great Service and actual OEM product, not a knock off like Ebay and Amazon.
I bolted a Shelby GT500 supercharger on my 2007 F150. The stock trans cooler wasn't sufficient. This one by the cubic in measurement is 50% bigger. It cools the trans fluid by 20 degrees.
Will
03/15/2024
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looks good
everything looks to be on the up and up. Haven't installed it yet but looks like it's all their.
greenboy
03/04/2024
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Great Service
Awsome service ! Quick shipping the Tru Cool 40k is working flawless. Glad I purchased from OPT. Just what my 4L80E needed.
M. Arroyo
02/12/2024
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TRUCOOL COOLERS
I ordered 20 of them. We install them on all of our truck transmission builds. This is the only place that has the original ones in the white and blue box. They are the great ones and OPT helped us out. Great product and great vendor
Annapolis Transmisisions
01/16/2024
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Tru-Cool 40,000 GVW
This isn't the 1st Tru-Cool 40,000 GVW cooler that I've ordered from OPT, and in each case received fast shipping and the items are always package in a manner that protects the cooler core from damage.
J. Jones
10/12/2023
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Just what the c10 needed
I have a 71 402 bbc with a built 4l80e trans, I happened to notice my tci had a blinking light and plugged in my monitor. 255 deg!!! Ouch. This was just with normal driving and getting on it once in a while not to mention 40 straight days of 100 Texas heat. Ordered this cooler and my last drive trans stayed 123F. I used my radiator cooler as well as the cooler added 6an fittings, and installed my cooler fittings on the top side. I think this is chevy’s main issue with all their 4l60s they ran the fittings on bottom of all their coolers , the cooler never fills up this way
Jeffrey Yosten
10/10/2023
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Real Tru-Cool 40k
Lots of stock, great price and quick shipping! A lot of sites are selling the fake tru-cools. This is legit!
Jason McDonald
08/15/2023
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All Good!
Glad to see someone selling the real thing instead of an offshore knockoff. Quality was top notch and it arrived very quickly. All good
T Grady
08/10/2023
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The real Tru-cool.
This is the authentic Tru-cool Trans cooler. Do not waste your money on a AMAZON knock-off. Last year I bought a knock-off on amazon, it lasted 9 months. On my family's first camping trip of the '23 season it blew while pulling a mountain in NC. Tow bill $530, trans parts $600, plus a weekend of work. Thank you OPT for your quick ship and selling authentic parts.
Richard N
05/26/2023
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Great Value!
Genuine Long Tru-Cool, best price around, the care taken during packaging was phenomenal. Item arrived fast and un-damaged!
Brent
04/10/2023
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great cooler
Recently bought one for my 2500hd 4l80 trans from you guys.First off delivery was great and IMO quick.As for the cooler its a genuine tru cool i was looking at e bay and amazon but didnt want to deal with counterfeits and seems to be alot.I installed cooler my temps were at 125-130 unloaded and 52-60 degrees.I had an oem and a 8x10 derale on before and ran 150-160 same conditions.Towing id creep up to 235 on steep grades in windy conditions 215 normally with toyhauler trailer.Interesting to see what the drop will be im guessing no more than 200
Robert O.
12/15/2022
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The real deal!!!!!
I bought what I thought was the same thing from ebay for quite a bit less money. They are CHEAP OVERSEAS COPIES!! Full on false advertising!! Says Tru-Cool, but they are not. I don't understand how they can get away with that. Instantly returned it. This cooler here is the real deal. Made in Canada. Shipped quickly. Don't waste your time buying that other garbage.
Clark
04/08/2022
Verified Buyer
7 of 9 customers found this helpful.
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Works like a charm on a 2001 F250
Before installing, we towed a 12,000 lb fifth wheel in 90-degree heat, we would hit 220 going up steep hills and have to pull over to cool down. Once we installed this on it, we never went over 180 degrees in similar conditions, except with much steeper hills. Regular driving without a camper it never exceeds 140 degrees. This thing is exceptional.
Andrew Kruse
07/16/2021
Verified Buyer
8 of 9 customers found this helpful.
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very happy Silverado owner
shipped fast and very easy install. My Silverado Z-71 was getting transmission temperatures up over 200 degrees on the highway after installing my lift and 35's, but after installing the Tru-Cool 40k we went on the highway with outside temps in the 90's and giving my truck hell the highest the transmission temperature got was 180. So I'm am very pleased with this product, price, and ease of installation. Thanks guys and God bless. 👊💯😎
Carl N Archuleta
07/04/2021
Verified Buyer
3 of 4 customers found this helpful.
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Tru-Cool 40k for Pontiac Grand Prix GXP
First of all, I am extremely happy with OPT. They repackaged the 40k cooler in a larger box and took the hose and mounting equipment out of the original box to prevent the mounting equipment from damaging the cooler. 10/10 Secondly, this cooler has worked great in standalone configuration on my 2006 Pontiac Grand Prix GXP. I created a website with a guide on how to install one of these coolers. https://sites.google.com/view/grand-prix-gxp-trans-cooler/how-to-install-a-transmission-cooler-on-a-2004-2008-pontiac-grand-prix-gxp I live in Texas and our outside temperature range is typically 30 to 110 degrees, more or less. It's currently June, and the highest temperature I have seen my transmission fluid be is 163 degrees on a 98 degree day. Any temperature under 200 degrees is ideal. These GXPs tend to run very hot without modification, reaching up to 220 degrees on a 30 minute drive on a very hot day. Even on a cold day, it'll get much hotter than 180 degrees on a long drive. This cooler in standalone configuration certainly solves that problem for me. The only downside to the 40k is that due to its huge size, the way I mounted it required me to modify some plastic on my car I wish I didn't have to modify. It was entirely due to the inlet and outlet being on the bottom. I would suggest to any other LS4 vehicle owners, that if you don't live in a place that often gets over 100 degrees outside, that you save yourself some trouble and get a Tru-Cool 30k instead. That one has the inlet and outlet on the side instead of bottom, so plumbing it to your transmission will be a lot simpler.
Brandon
06/24/2021
Verified Buyer
3 of 3 customers found this helpful.
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Clean ,not damage, came with fittings
This is second time I've ordered from them ,quality and no issues with shipping
Louis G
06/07/2021
Verified Buyer
2 of 2 customers found this helpful.
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2003 Silverado SS
Amazing product! Normally. I’d reach 200° on a 75° day and I’m unable to even break 110 after this install. Transmission seems much happier and now has the ability to stay cooler.
Michael Frank
06/01/2021
Verified Buyer
2 of 2 customers found this helpful.
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40k try cool
Great!!!
Gabriel
05/06/2021
Verified Buyer
1 of 1 customers found this helpful.
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Awesome ATF cooler
After installing, & observing fluid temperature range.. Tru-Cool Max, works excellent, on keeping the ATF temperature down when towing & just normal driving. Thank You.. Oregon Performance Transmission.
08 silverado
04/18/2021
Verified Buyer
4 of 4 customers found this helpful.
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Great product
Great product dropped my trans temp after installing 3600 stall only down side was extremely slow shipping
Daniel Mejia
03/12/2021
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Very nicely packaged
My cooler came very nicely packaged. Also this cooler works way better than my stock trans cooler. Easy install and a good price. I recommend Oregon Performance. I wish I could leave pictures of my install lol
Michael Hernandez
12/15/2020
Verified Buyer
2 of 2 customers found this helpful.
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2019 Tundra
Since the 2019 and 2020 Tundra now come without a transmission cooler,, this was an excellent choice.. Cooler looks very well built. I used the brackets that came with the kit. Fit perfectly. I have pictures if needed.
Ricardo Vale
12/04/2020
Verified Buyer
2 of 2 customers found this helpful.
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40k trans cooler
Super awesome cooler with a built trans and cammed truck keeps temps roughly around 130ish
Pompeyo
11/16/2020
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Bigger and cooler
Was a fairly easy install and worth it, I did the install myself and was easy.
C.J. HERRERA
09/16/2020
Verified Buyer
1 of 1 customers found this helpful.
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Amazing Tranny Cooler
Absolutely incredible results on my 2007.5 Silverado 1500. Cruising around id get to about 210 on the gauge, if i was romping it i could see 230 or more. Now, I struggle to see 130 on a cool night, never above 150 or so during heat of the day. Loving it!!!
Matt Kuhar
08/23/2020
Verified Buyer
3 of 3 customers found this helpful.
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01 2500HD
Arrived promptly. Lowered my trans temp while towing 6000 lbs up hills on 80 degree Fahrenheit days at 3300 feet above sea level. Previously 230 degrees Fahrenheit down to 169. Averages about 140 degrees Fahrenheit with no load, on 75 degree days at 3300 feet. Prior to install have pulled about 14,000 lbs and believe I could better do so now and not exceed 210-220 degrees Fahrenheit. I haven't tried winter driving at -20 degree Fahrenheit yet, but hope the thermostat bypass works. Mileage at install 246,000 miles. Transmission 4L80E. Only drawback is installation is not plug and play for 2001 Chevy 2500 HD. Needed a tubing cutter to cleanly cut existing steel transmission cooler lines for attaching rubber hoses to have sweeping curves. Had to flip existing transmission cooler bracket upside down and notch ends. Drill it to match lower holes on this new cooler and then use the supplied self tapping bolts. You then have to find a way to attach your outside air temperature sensor. I fabricated two of the supplied metal tabs into a crude bracket. Also, you will need to cut off the welded tab holding the power steering cooler to the frame that holds the hood latch and tranny cooler. I used a cutting wheel on my grinder. Then use a strong zip-tie to reattach the power steering cooler to the said frame. There are aftermarket brackets. they may save these fabrication steps? Hoses are rubber and use hose clamps to secure to barbed fittings that are NPT and thread into cooler. Check these connections every so often as tranny fluid will decay these hoses and if they ever leak you could loose all your fluid with no indication until your transmission is ruined. Overall a good value for the money. Quality aluminum plate cooler made in Canada. Remedies General Motors original shortcomings in transmission cooling. Oregon Performance was prompt and sent a follow up survey. Good job guys.
Paul
07/10/2020
Verified Buyer
1 of 1 customers found this helpful.
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One bad transmission cooler
Id like to say that when i heard about this transmission cooler i was all onboard. I own a 2001 chevy suburban 4x4 and i actually use it the way it was designed. Im an outdoorsman so it sees mud, snow, heat, dirt/dust, and towing. Original transmission with 200k+ miles so i wanted extra insurance while towing 7k lbs. I do not have a trans cooler temp gauge as of yet so i cant give specific numbers but she runs like a champ and shifts are smooth and on time. No dragging at all under heavy load. The customer service from Brian was nothing but the very best. It was very late at night (morning) and i needed the part shipped to the east coast faster than pronto and he made sure that i got it right on time and was able to install it and make my trip. Install was straight forward and little fabrication was required. The product works and works well and customer service is 2nd to none. Thanks again for your hard work proving to this 1st time customer that your company is one worthy of my business for the long haul!
Mr. Ware
06/01/2020
Verified Buyer
8 of 8 customers found this helpful.
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2005 Chevy Silverado crew cab
Im very happy with this cooler. Easy installation and great shipping.
John F
05/22/2020
Verified Buyer
3 of 3 customers found this helpful.
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2011 GMC SIERRA
Couldn’t be more happier, not only did the job/ still doing. But My temp dropped by around 25 degrees while pulling our camper, and simplify adding a longer life to my transmission. I wish I’d done this A LONG TIME AGO
Charles
05/14/2020
Verified Buyer
6 of 10 customers found this helpful.
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Just buy it.
Easy fit on my 2001 Silverado 1500. Minor drilling required and all the fittings needed included. Fast shipping.
spencer
04/23/2020
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Amazing product for the best price.
I had previously ordered one from another retailer on eBay, and it came damaged from the brackets being on top of the cooler fins. I was delighted to see that your company had already foreseen the likes of this issue and took it out. Wrote a note explaining why and even some pointers on installation. I cannot thank yall enough and will link your page and this product Everytime somebody asks about a transcooler in the LS4 community. Thanks again 😁👍
Noah S
04/03/2020
Verified Buyer
8 of 9 customers found this helpful.
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89 GMC C7000 366 v8 Allison at540
Purchased a 40k trans cooler for my work truck because no one makes a radiator for these trucks anymore with a built-in trans cooler. The cooler setup came with everything needed to install and the cooler is very well built. Shipping was fast great company to work with THANKS OREGON. Look for to doing future business.
Jason T.
03/26/2020
Verified Buyer
3 of 3 customers found this helpful.
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Hi
The delivery of my trans cooler was on time. The cooler itself was well packaged and in good condition when I opened it up. It was the exact sized cooler to replace my old one. Thank you for your service.
Fran
03/24/2020
Verified Buyer
5 of 5 customers found this helpful.
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Question
Will this fit a 2016 5.3 silverado?
Thatoneguy
02/20/2020
2 of 2 customers found this helpful.
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2001 Chevy G3500 Van with 5.7 Vortec & 4L80E
This van comes stock with a small oil cooler for the 4L80E trans and it used to heat up and shift hard in the mountains. On one particular pass the gauge would read about 185F. Now in similar conditions it reads 130F. This is a high quality unit and the mounting kit is really nice.
Jake
01/27/2020
Verified Buyer
8 of 8 customers found this helpful.
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2007 2500 Dodge Ram 5.9 diesel
I installed a 40k transmission cooler in my 2007 Dodge Ram 2500 5.9 diesel. It has been run at least 30 degrees cooler. So far I’m impressed.
Blake Brovont
11/09/2019
Verified Buyer
14 of 17 customers found this helpful.
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Transmission cooler
Easy install on a 2008 Yukon Denali. Fit great and had a 30 degree drop in transmission temp. I did buy a separate kit with custom brackets for GMC trucks, made install a snap.
Chris
10/29/2019
13 of 13 customers found this helpful.
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Mission accomplished!
This trans cooler did exactly what I needed it to do! Lowered overall temp by 30-40 degrees.
Sharon Tatum
10/08/2019
Verified Buyer
8 of 9 customers found this helpful.
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Transmission oil cooler
Put Transmission oil cooler in 2010 Sierra 1500 to tow dump trailer. Install was a snap since heavy 1/2 ton had small one in place. About 3 times the surface area of OEM cooler and dropped operating transmission temp 20 % ( or about 35 degrees under load). Happy with purchase.
Tom Langston
09/30/2019
Verified Buyer
10 of 10 customers found this helpful.
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It just works
I have a built Allison transmission in my 2011 Duramax; factor that in with the west Texas heat and the factory transmission cooler just couldn’t keep up. After installing the Tru Cool Max I’m seeing 30 to 40 degree lower transmission temperatures now! Great, effective, quality product. Highly recommended!
Lance
07/21/2019
Verified Buyer
8 of 9 customers found this helpful.
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40k trans cooler
I recently purchased a 40k transcooler for my 08 Chevy 2500 and man did it do exactly what I needed. My gauges changes 35-50 degrees cooler and I couldn't be any happier. Shipping was 5 days like planned. Thanks Oregon performance
Isaac M Ramos
07/13/2019
Verified Buyer
5 of 5 customers found this helpful.
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OPT
Great cooler. Great Price. Well packaged arrived quickly. No damage THxs
TD
06/26/2019
Verified Buyer
4 of 4 customers found this helpful.
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Tru Cool 4739-1
The cooler came quick and with no damage. Installation was easy. Trans is running so cool now I can't believe it. Great product. I should have done this years ago.
David Farrell
05/02/2019
Verified Buyer
8 of 9 customers found this helpful.
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Large well made cooler - Hard to find AN fittings
The cooler is large and appears to be very well made. No doubt it is going to help keep everything cool. Only problem I had was the fittings on it are 3/8 inverted flare. I was not able to find fittings to convert this to 6-AN so installed it with the bard fittings that were supplied.
Very sorry for any issue you may have had. There are a few options on the inverted flare to -6 AN fittings. Russell brand, part number 640380 is a 5/8"-18 to -6 AN adapter that will work.
Dejay
02/01/2018
Verified Buyer
9 of 9 customers found this helpful.
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Fast shipping
Shipped cooler right away. Nice product. Keeps my F250 cool.
G
12/21/2017
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3 of 4 customers found this helpful.
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Tru-Cool Max 40,000 GVW 4739-1 LPD47391
Great Service, Great price, Fast Shipping, Cooler Arrived in perfect shape installed on my 2013 Silverado with some fabrication Huge difference in lowering the temperature Death Valley tested, I'm extremely Pleased Thanks OPT.
Dave N.
09/20/2017
Verified Buyer
11 of 12 customers found this helpful.
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40.000 gvw Tru cool trans cooler
This 40k cooler fit with some fab work in in my 2008 sierra1500 very easy,Dropped trans temp from 195* to 160* works very good ran it inline with radiator cooler
Bryan
06/03/2017
Verified Buyer
6 of 8 customers found this helpful.
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Awesome Cooler
Awesome Cooler & Great service from Oregon Performance Transmission.
Ruben
05/14/2017
Verified Buyer
2 of 2 customers found this helpful.
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Best cooler ever
the strongest cooler in the market unti now, amazing for hot desert climate and extreme sand driving. thanks oregon for the fast service.
Ahmed Al-Abri
04/05/2017
Verified Buyer
4 of 4 customers found this helpful.
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NICE COOLER
THE COOLER IS GREAT. JUST WHAT I NEEDED. SHIPPED RIGHT AWAY.
CODY
02/10/2017
Verified Buyer
4 of 4 customers found this helpful.
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Top quality!
The Tru-Cool Max cooler fixed my customer's transmission overheat where the prior installed 10,000 pound RV cooler could not. The Tru-Cool Max design improved air flow through the radiator and dropped his engine temperature as well. The thermal bypass appears to be aircraft quality and allows quick warm up. Good mounting hardware too. In a separate class from common parts store coolers.
G.D.
02/03/2017
Verified Buyer
8 of 9 customers found this helpful.
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