Bought what I thought was real on ebay. Everything matched. The quality of this one is no comparison!!! Buy it up.

Similar to another reviewer, I got one on Prime and within a year it split and leaked out a lot of fluid. Luckily I was near work and it didn't cause any further damage. After receiving this cooler is was obvious the Prime one was a knockoff. This cooler, however, is legit and has dropped my temps by at least 20-30 degrees F. Shipping and processing time were lightning fast. Thanks OPT!

It’s a lot of knock off and this is the real deal.. fast shipping

Installed, but haven't used yet. Rebuilding xfer case right now. Cooler looks to be good quality, mounting was simple enough. Hopefully it extends the life of my 4l60e.

If you're interested in the most efficient and highest quality trans cooler . Look no farther , you've found it.... As to whether or not to purchase from Oregon Performance , you'll be glad that you did. Easy and smooth transaction. Well packaged with quick shipping.

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.

Dropped temps by 35 degrees on my 2011 Silverado vs the factory aux trans cooler.

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!

Really nice transmission cooler. Way bigger than the stock gm cooler.

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.

everything looks to be on the up and up. Haven't installed it yet but looks like it's all their.

Awsome service ! Quick shipping the Tru Cool 40k is working flawless. Glad I purchased from OPT. Just what my 4L80E needed.

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

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.

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

Lots of stock, great price and quick shipping! A lot of sites are selling the fake tru-cools. This is legit!

Glad to see someone selling the real thing instead of an offshore knockoff. Quality was top notch and it arrived very quickly. All good

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.

Genuine Long Tru-Cool, best price around, the care taken during packaging was phenomenal. Item arrived fast and un-damaged!

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

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.

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.

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. 👊💯😎

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.

This is second time I've ordered from them ,quality and no issues with shipping

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.

Great!!!

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.

Great product dropped my trans temp after installing 3600 stall only down side was extremely slow shipping

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

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.

Super awesome cooler with a built trans and cammed truck keeps temps roughly around 130ish

Was a fairly easy install and worth it, I did the install myself and was easy.

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!!!

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.

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!

Im very happy with this cooler. Easy installation and great shipping.

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

Easy fit on my 2001 Silverado 1500. Minor drilling required and all the fittings needed included. Fast shipping.

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 😁👍

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.

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.

Will this fit a 2016 5.3 silverado?

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.

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.

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.

This trans cooler did exactly what I needed it to do! Lowered overall temp by 30-40 degrees.

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.

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!

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

Great cooler. Great Price. Well packaged arrived quickly. No damage THxs

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.

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.

Shipped cooler right away. Nice product. Keeps my F250 cool.

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.

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

Awesome Cooler & Great service from Oregon Performance Transmission.

the strongest cooler in the market unti now, amazing for hot desert climate and extreme sand driving. thanks oregon for the fast service.

THE COOLER IS GREAT. JUST WHAT I NEEDED. SHIPPED RIGHT AWAY.

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.