Tru-Cool 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.

Great product. The seller was very helpful. Highly recomended

Worked awesome. Lowered tranny 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.