Max LPD4739 4739 40,000 GVW Low Pressure Drop Transmission Oil Cooler with Thermal Bypass

Good quality. Keeps the trans cool while towing up hills. I receive a damaged one at first but it was replaced with no questions or difficulties. Good customer service. Also looks great compared to the OEM cooler.

Easy to install. All necessary parts are in the kit. Instructions easy to follow. Price was right. Dropped trans temp from 210 degree to 145 with an 8ft in bed camper on the truck. Would say that is a pretty good drop in temp.

When I made my purchase it was fulfilled by Remco Transmission out of Texas. The description read: "Tru-Cool Max LPD4739 4739 40,000 GVW Low Pressure Drop Transmission Oil Cooler with Thermal Bypass." Tru-Cool uses two part number for the same cooler. Part number 4739 is with a thermal bypass and is more expensive. Part number 47391 is WITHOUT the bypass which is cheaper. When I received the cooler there was no part number on the box. There was no thermal bypass in the box when I opened it. When I contacted Remco through Amazon, Remco told me that the picture does not show a bypass and they do not stock the cooler with a bypass (despite the description). Remco offered me $25 off or the option to return the cooler. The bypass is about $60 available separately, so I returned it. If need a cooler with a bypass order elsewhere. If you want a cooler without a bypass order elsewhere, because you can find it cheaper than Remco. Remco is selling you the more expensive description but shipping the cheaper part. At best Remco is incompetent, at worst this is out right fraud.

Very little modification needed to install and the cooler performs absolutely wonderful! Installed it on a 2007 Chevy Suburban 5.3L - prior to the installation the vehicle would run upwards of 200 plus degrees while pulling a 26ft travel trailer in warmer weather (85 degrees and up) and now pulling an even larger travel trailer (Whitehawk 30dsqb) in warmer weather it doesn't pass 185 degrees! Awesome product and well built! I did spray paint it black so it would blend in better with the front end through the grill... Other little trick was determining the direction of fluid flow to even hook the unit up. In summary, I highly recommend this product.

this transmission oil cooler is legit, installed a 223 cam, and 411 gears and 3000 stall converter, took it for a spin on june 20,2020 outside temp was 78° my transmission oil temp went up to 250° After tru cool 40k install took the same route on June 26 only this time the outside temp is 98° and my transmission was 145° WOW iam very impressed!!!

Fittings don’t work if you are running AN lines. It is a good product works great on cooling the transmission unfortunately my cooler is leaking from the fins somehow I installed it in June or July of 2023 and 2 months later it started leaking from the fins. I have been running it for over a year now even with the leak and trans never gets hot. I think when I replace it I will look into better quality. But for the price you can’t beat it

This cooler dramatically decreased my trans temps in my 2010 Silverado w a 5.3 and 6L80 transmission when towing my 28ft camper. Temps dont go over 170 degs in the middle of summer 95deg days regardless on stop and go traffic or going 80 down the interstate. Would be the first upgrades I'd make when hauling a larger trailer.

Best transmission cooler upgrade you can do besides a trans temp gauge. Went on my 03 silverado I have a 2800 stall in it and b4 I got this pulling my 30 ft camper I seen a high temp of 240 which can toast a tranny quick at that temp.and now pulling it it will NOT go above 175 on a 95f day. I didn't use the thermostat thing as cooler already has a valve in it to let cold fluid pass thru. Gonna need at least 2 qts of atf to compensate for the bigger cooler got more fluid goin thru so if it feels sluggish check n add fluid

Great product. The seller was very helpful. Highly recomended

Worked awesome. Lowered tranny temp