Alternate part numbers: OC-4739, OC-4739, LPD-4739. $189.99. Tru Cool 47391 40k GVW Transmission Coolers in Stock and Ready to Ship. Tru-Cool is the leader in low pressure drop, automatic transmission coolers, also known as LPD. A bypass is not something that is typically needed unless you live in a fairly cold climate; for example, a place where temperatures in the winter are regularly below 32°F. If you do not need the thermal bypass but do need a great transmission cooler, and have the available space, we have that product under part number LNG-47391. The stock tranny cooler wasn’t adequate with this load on a hot day. I have been told the E4OD will not get to the right operating temps if I don't run one. The Tru-Cool Max cooler fixed my customer's transmission overheat where the prior installed 10,000 pound RV cooler could not. Worked well for my application. We sell the bypass individually under part number LNG-4739P6. The thermal bypass appears to be aircraft quality and allows quick warm up. Add to the 47391 or any other cooler with 3/8" or … Can I buy the bypass separately and add it on? Tru-Cool Transmission oil cooler … So if you already have a cooler you like, adding the bypass on is definitely okay. When the transmission is cold, the thermal bypass will "bypass" the cooler so it can bring the transmission up to operating temperature more quickly. Installs in cooler line. This is a stacked plate, low pressure drop unit. $189.99 Tru-Cool 40,000 GVW LPD4739 Transmission Cooler Thermal Bypass 40K Fluid Oil 4739 Max True Long. C $525.23. Bump. Read honest and unbiased product reviews from our users. All True-Cool coolers come with a manufacturer's limited lifetime warranty. Free shipping. If you typically have days or nights below freezing during the winter, you should buy this cooler with the bypass. Tru-Cool LPD 4590 Automatic Transmission Cooler 28,000 GVW LPD4590 Fluid Oil True-Cool … Opens fully at approx. What is the thread on LPD-4739? Fall is a great time to consider installing a transmission cooler in your vehicle. Optional: Thermal Bypass [+$40.00] Optional: Black Braided -6AN Hose Kit … This cooler has 3/8" inverted flare fittings and comes with a thermal bypass valve so you can use this cooler in cold weather and the fluid will bypass until the transmission comes up to operating temeratures. Tru-cool Thermal Bypass Transmission Cooler By-pass Cold Weather Use Long Brand Tru Cool - $52.04. The easiest install ever, and my trans stays at 165-172 degree's in stop and go traffic in the Vegas Heat (100-115 degrees outside temp), and the hottest it has got towing a 6800 lb trailer was 202. TRU-COOL MAX LPD4739 TRANSMISSION OIL COOLER. Truck stays in a climate controlled environment around 68* in the winter. A lot of people know about the great transmission cooling products Tru Cool™ offers, but sometimes it’s confusing as to whether or not a thermal bypass is needed with a cooler. Tru-Cool Max Transmission Cooler 40,000 GVW Fluid Oil 40K True Long Brand 4739-1 LPD47391 Automatic, Tru-Cool 29,200 BTU H7B Engine Oil Cooler External Motor Cooling 1/2 NPT Fittings 4263P52, Lubegard Kooler Flush Transmission Line & Cooler Cleaner, { Oregon Performance Transmission will NEVER sell, transfer, show or otherwise cause your email to be seen by anyone else. In the description of the Tru-Cool Max LPD4739 4739 40,000 GVW Low Pressure Drop Transmission Oil Cooler with Thermal Bypass: "comes with a thermal bypass valve so you can use this cooler in cold weather and the fluid will bypass until the transmission comes up to operating temeratures." Please refer to the Tru-Cool brochure to match your vehicle to the heat exchanger that best suits your cooling needs. I haven’t had the time to put it thru the real test as of yet. Heat is what kills an automatic transmission. This is a stacked plate, low pressure drop unit. Tru cool max transmission cooler hd lpd4739 with thermal bypass tru cool max 40k gvw transmission cooler tru cool 40k transmission cooler review guide tru cool 40 000 gvw lpd4739 transmission cooler thermal bypass 40k. External thermal bypass for large coolers used in cold climates (32 degree -). I received my tru cool tranny cooler in a couple of days. Copyright © 2021 Oregon Performance Transmission. Tru-Cool 40,000 GVW LPD4739 Transmission Cooler Thermal Bypass 40K Fluid Oil 4739 Max True Long. This Tru-Cool Max 4739 unit is a 40K model. The thermal bypass is an added valve that goes in the transmission line. Upgraded line and fittings would need to be purchased separately. 08z71bgm Supporting Member. So far so good. I assume the 44k has a 4k higher capacity.. Is that overkill? NOTE: OPT uses javascript to enhance and secure your online experience. Keep your operating temperatures low, even in harsh conditions, and protect the vehicle you rely on. When the transmission is cold, the thermal bypass will "bypass" the cooler so it can bring the transmission up to operating temperature more quickly. Extend the life of your transmission and avoid costly repairs with Tru-Cool® transmission and engine coolers. I'll have full bolt on & stall eventually. Posts: 346 Likes Received: 335 This cooler has 3/8" inverted flare fittings and comes with a thermal bypass valve so you can use this cooler in cold weather and the fluid will bypass … 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. Driving out of the garage 10 miles or so the trans gauge barely registers above the 100* reading even with the 3200 stall (hwy driving). Top Rated Seller … The thermal bypass is a small added valve that goes in the transmission line. I installed the cooler on my 2002 GMC 2500HD truck. Tru-Cool Low Pressure Drop (LPD) Transmission coolers have a unique cold weather passive bypass that allows the thicker ATF to flow more efficiently through the cooler at the top of the system. This cooler is rated at 40,000 GVW and measures 8.5"x22.75"x1.25". { Oregon Performance Transmission will NEVER sell, transfer, show or otherwise cause your email to be seen by anyone else. ... Tru-cool Thermal - $52.99. Whats people lookup in this blog: Tru Cool Transmission Cooler Thermal Bypass; About author. I'm in NJ so it can be pretty cold in the 10-20s sometimes Side note.. #epSummary .fa, #etSummary .fa, .esSummary .fa, .epRating .fa, .etRating .fa, .randomStars .fa { color: #FFD700; font-size: inherit; text-rendering: auto; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }, Tru-Cool Max transmission cooler by Long Manufacturing. All parts and instructions are included to mount and plumb this cooler. We not only carry a wide range of performance minded transmission parts for your car, but we also provide the best customer service; before and after the sale. This is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing. THERMAL BYPASS VALVE TWO STYLES OF MOUNTING HARDWARE. /* review stars */ Top Rated Seller Top Rated Seller. Jul 21, 2020 at 3:53 PM #50. Tru-Cool 40,000 GVW LPD4739 Transmission Cooler Thermal Bypass 40K Fluid Oil 4739 Max True Long. Maintain lower temperatures in your transmission and lubricant with Tru-Cool and extend the life of the vehicle you depend on. $51.20 (5) 1 Review. This cooler … Typical cooler installation. Some people elect to bypass the radiator for more cooling, but I did not. OIL COOLER, TRU-COOL MAX WITHREMOTE THERMAL BYPASS. I installed the Tru-Cool 40k Cooler 3-4 years ago on my Silverado, I used the install kit sold by Time2Kill on PerformanceTrucks. NOTE: OPT uses javascript to enhance and secure your online experience. If you live in an area that routinely experiences temperatures at or below 32F, you should consider using the Tru-Cool 40,000 GVW cooler that comes with the external thermal bypass. I just had enough hose. Yes. As operating temperatures increase, the ATF heats up and becomes thinner. The only difference between the two? Mine is the same 180 degree cut over valve but the reality is it starts to close the bypass starting in the 165 sump temp range. For many people, the busyness of summer travel has settled down, the kids are back in school, and there’s finally time to work on vehicle projects before the snow and freezing temperatures hit. Grab an Lsx Matt Hoodie or Tee here:https://teespring.com/stores/lsxmerchFollow me on Instagram! Good mounting hardware too. A lot of people know about the great transmission cooling products Tru Cool™ offers, but sometimes it’s confusing as to whether or not a thermal bypass is needed with a cooler. What Tru-Cool heat exchanger would be best suited for my vehicle? ... 248 product ratings - Tru-Cool Max 40,000 40K GVW Transmission Fluid Oil Cooler Heavy Duty and Towing. Ecommerce Web Development: Phosphor Media. This is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing. It took me a couple of hours and the kit came with everything I needed. Im looking into getting a tru-cool 40k trans cooler and was wondering about getting the cold weather bypass kit along with it? We not only carry a wide range of performance minded transmission parts for your car, but we also provide the best customer service; before and after the sale. Copyright © 2021 Oregon Performance Transmission. }. Here in Texas, the summers get pretty hot. No problems. Due to liability issues, we can't recommend a heat exchanger. High Performance Truck Tru-cool Max 40,000 40k Gvw Transmission Fluid Oil Cooler Tru-cool Max - $419.95. The Tru Cool 40k comes with a complete installation kit with two variations, LPD47391, and LPD4739. Rest Easy. ivin74 and PNW VietVet like this. The Tru-Cool Max design improved air flow through the radiator and dropped his engine temperature as well. Transmission fluid is heated as it passes through the radiator, essentially removing the need for an external thermal bypass. It’s working good so far. *In the 94-97 Ford trucks, remove your factory cooler. Tru-Cool Max 40,000 GVW Transmission Performance Oil Cooler. Thread is 5/8" - 18 UNF 2B thread (3/8" inverted flare). The Tru-Cool system then directs the ATF through the core, where it is cooled. I already own a cooler but it doesn’t have a bypass. Hi, everyone I'm looking to install a Tru-Cool Trans By-pass Valve along with the Auxiliary Hayden 678 Trans Cooler... From my understanding the By-pass Valve fully opens at -/+ 180°. Be the first to review this product. This thermal bypass is typically used in areas where the climate is much colder, and helps the fluid reach optimal operating temps before completely flowing through the system. The 4739 comes with a thermal bypass, while the 47391 does not. Our most popular transmission cooler from Tru-Cool™, part number LNG-47391 , has a sister cooler under part number LNG-4739 . 180 +-. Ecommerce Web Development: Phosphor Media. The fittings on this cooler are 3/8" inverted flare. This new cooler is 4 times the size of the old one. Would you think its a good idea to remove the small stock trans cooler when installing the Tru-cool or keep both. Also what's the cold weather bypass? This heat is absorbed by the oil in the transmission and is extracted through a cooling system. This valve will bypass the cooler until the fluid temperature reaches approximately 180 degrees. Dieselsite.com shows that the E4OD requires it. My tru-cool doesn't have the thermal bypass, didn't think I'd need one living in SC where our winters are usually mild. Tru-Cool. If you want to extend the life of your transmission and avoid a premature, costly rebuild, this is very cheap insurance. SKU: LPD47391. I tow a 24 foot travel trailer with two ATVs on the back of my truck. Tru-Cool Thermal Bypass 4739P6 Long Brand Transmission Cooler External 708 4739-P6 True. Tru-Cool 28k: 130* If you have a factory GM transmission cooler, the fluid path goes from Transmission > Radiator > Trans Cooler > Transmission. When the transmission is cold, the thermal bypass will “bypass” the cooler so it can bring the transmission up to operating temperature more quickly. Tru-Cool 40k Transmission Cooler. Our most popular transmission cooler from Tru-Cool™, part number, Yes. Tru-Cool 40,000 GVW LPD4739 Transmission Cooler Thermal Bypass 40K Fluid Oil 4739 Max True Long OPT Product Code: LNG-4739 Ecommerce Web Development: Phosphor Media. Drive Hard. The thermal bypass is an added valve that goes in the transmission line. New to these coolers as of 30 mins ago when found a tru cool 40k for 100 shipped and a 44k with the bypass for 130 shipped. Find helpful customer reviews and review ratings for Tru-Cool Max LPD4739 4739 40,000 GVW Low Pressure Drop Transmission Oil Cooler with Thermal Bypass at Amazon.com. If you would like to purchase a cooler with a bypass, we sell that package under part number LNG-4739. Looked at a lot of different coolers on the market. This cooler is rated at 40,000 GVW and measures 8.5"x22.75"x1.25". The bypass works very well with other coolers, such as the Tru Cool™ 49211 cooler. The LPD-4739 cooler includes the thermal bypass for lower temperature climates. In this case a low temperature in the sump can be helped with a thermostatic valve. What about using the thermal bypass valve. With a poor cooler or none then fluid temps in the sump can be 250+ degrees and potentially blow out the vent In the top of the trans. C $446.21. For more information about transmission or engine oil coolers, please feel free to contact us at sales@oregonperformancetransmission.com. Install your Tru-Cool transmission oil cooler with confidence with Tru-Cool mounting hardware. }. Manufacturer: Tru-Cool. Long Tru-Cool Max transmission cooler P/N LPD47391. All components are available as a universal kit* or are sold separately. Our most popular transmission cooler from Tru-Cool™, part number LNG-47391, has a sister cooler under part number LNG-4739. Oregon Performance Transmission is the best place on the web to buy transmission parts! I installed the thermostat that came with this kit as well. If you live in a cold climate where it’s freezing in the winter a lot you can use TruCools thermal bypass so nothing flows until a certain temp. Oregon Performance Transmission is the best place on the web to buy transmission parts! Ecommerce Web Development: Phosphor Media. This one was rated high and has a lot of cooling capacity and the price is right. WITH COLD WEATHER BYPASS KIT. What does it do and with me living in south GA (Very close to FL) would I need that and right now I have a 4L60e but will be upgrading to a 4L80e so I can swap it right, I wouldnt see why not? Brand New. The LPD4739 trans cooler includes a thermal bypass. 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