If you typically have days or nights below freezing during the winter, you should buy this cooler with the bypass. 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. I installed the cooler on my 2002 GMC 2500HD truck. Maintain lower temperatures in your transmission and lubricant with Tru-Cool and extend the life of the vehicle you depend on. WITH COLD WEATHER BYPASS KIT. Tru-Cool 40,000 GVW LPD4739 Transmission Cooler Thermal Bypass 40K Fluid Oil 4739 Max True Long OPT Product Code: LNG-4739 When an auxiliary transmission oil cooler is required for your vehicle, Tru-Cool Max delivers optimal protection with double the cooling performance of our other products. }. Ecommerce Web Development: Phosphor Media. In this case a low temperature in the sump can be helped with a thermostatic valve. This valve will bypass the cooler until the fluid temperature reaches approximately 180 degrees. I installed the thermostat that came with this kit as well. So far so good. /* review stars */ It’s working good so far. Copyright © 2021 Oregon Performance Transmission. THERMAL BYPASS VALVE TWO STYLES OF MOUNTING HARDWARE. 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 Thermal - $52.99. This by pass is included in the Tru-Cool 4739 cooler. 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. ... 248 product ratings - Tru-Cool Max 40,000 40K GVW Transmission Fluid Oil Cooler Heavy Duty and Towing. 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. Tru-Cool Max 40,000 GVW Transmission Performance Oil Cooler. So if you already have a cooler you like, adding the bypass on is definitely okay. Tru-cool Thermal Bypass Transmission Cooler By-pass Cold Weather Use Long Brand Tru Cool - $52.04. Posts: 346 Likes Received: 335 Tru-Cool 40,000 GVW LPD4739 Transmission Cooler Thermal Bypass 40K Fluid Oil 4739 Max True Long. Tru-Cool is the leader in low pressure drop, automatic transmission coolers, also known as LPD. Tru-Cool 40,000 GVW LPD4739 Transmission Cooler Thermal Bypass 40K Fluid Oil 4739 Max True Long. Extend the life of your transmission and avoid costly repairs with Tru-Cool® transmission and engine coolers. Some people elect to bypass the radiator for more cooling, but I did not. Ecommerce Web Development: Phosphor Media. No problems. Worked well for my application. Our most popular transmission cooler from Tru-Cool™, part number LNG-47391, has a sister cooler under part number LNG-4739. Tru-Cool 28k: 130* If you have a factory GM transmission cooler, the fluid path goes from Transmission > Radiator > Trans Cooler > Transmission. I'll have full bolt on & stall eventually. Top Rated Seller … For more information about transmission or engine oil coolers, please feel free to contact us at sales@oregonperformancetransmission.com. Looked at a lot of different coolers on the market. 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. 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. The Tru-Cool Max design improved air flow through the radiator and dropped his engine temperature as well. 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. When the transmission is cold, the thermal bypass will "bypass" the cooler so it can bring the transmission up to operating temperature more quickly. Oregon Performance Transmission is the best place on the web to buy transmission parts! Tru-Cool Transmission oil cooler … 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." 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. 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. 180 +-. 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 … The stock tranny cooler wasn’t adequate with this load on a hot day. Grab an Lsx Matt Hoodie or Tee here:https://teespring.com/stores/lsxmerchFollow me on Instagram! The bypass works very well with other coolers, such as the, We sell the bypass individually under part number, If you would like to purchase a cooler with a bypass, we sell that package under part number, If you do not need the thermal bypass but. All components are available as a universal kit* or are sold separately. What is the thread on LPD-4739? }. Our most popular transmission cooler from Tru-Cool™, part number, Yes. C $446.21. When the transmission is cold, the thermal bypass will “bypass” the cooler so it can bring the transmission up to operating temperature more quickly. 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. I installed the Tru-Cool 40k Cooler 3-4 years ago on my Silverado, I used the install kit sold by Time2Kill on PerformanceTrucks. The bypass works very well with other coolers, such as the Tru Cool™ 49211 cooler. Tru Cool 47391 40k GVW Transmission Coolers in Stock and Ready to Ship. As operating temperatures increase, the ATF heats up and becomes thinner. If you want to extend the life of your transmission and avoid a premature, costly rebuild, this is very cheap insurance. Drive Hard. Please refer to the Tru-Cool brochure to match your vehicle to the heat exchanger that best suits your cooling needs. Tru-Cool 40k Transmission Cooler. This is a stacked plate, low pressure drop unit. External thermal bypass for large coolers used in cold climates (32 degree -). 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. Tru-Cool Thermal Bypass 4739P6 Long Brand Transmission Cooler External 708 4739-P6 True. Opens fully at approx. Top Rated Seller Top Rated Seller. Brand New. I already own a cooler but it doesn’t have a bypass. This cooler … I received my tru cool tranny cooler in a couple of days. Ecommerce Web Development: Phosphor Media. Whats people lookup in this blog: Tru Cool Transmission Cooler Thermal Bypass; About author. 08z71bgm Supporting Member. All True-Cool coolers come with a manufacturer's limited lifetime warranty. 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. Typical cooler installation. This heat is absorbed by the oil in the transmission and is extracted through a cooling system. Be the first to review this product. NOTE: OPT uses javascript to enhance and secure your online experience. The fittings on this cooler are 3/8" inverted flare. $189.99 This cooler is rated at 40,000 GVW and measures 8.5"x22.75"x1.25". 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. What Tru-Cool heat exchanger would be best suited for my vehicle? 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. Due to liability issues, we can't recommend a heat exchanger. Jul 21, 2020 at 3:53 PM #50. High Performance Truck Tru-cool Max 40,000 40k Gvw Transmission Fluid Oil Cooler Tru-cool Max - $419.95. I tow a 24 foot travel trailer with two ATVs on the back of my truck. I haven’t had the time to put it thru the real test as of yet. Oregon Performance Transmission is the best place on the web to buy transmission parts! If you would like to purchase a cooler with a bypass, we sell that package under part number LNG-4739. The thermal bypass is an added valve that goes in the transmission line. 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). Read honest and unbiased product reviews from our users. Installs in cooler line. C $525.23. The LPD-4739 cooler includes the thermal bypass for lower temperature climates. Would you think its a good idea to remove the small stock trans cooler when installing the Tru-cool or keep both. TRU-COOL MAX LPD4739 TRANSMISSION OIL COOLER. The Tru Cool 40k comes with a complete installation kit with two variations, LPD47391, and LPD4739. #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. Install your Tru-Cool transmission oil cooler with confidence with Tru-Cool mounting hardware. 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. Dieselsite.com shows that the E4OD requires it. The thermal bypass appears to be aircraft quality and allows quick warm up. 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. $189.99. Ecommerce Web Development: Phosphor Media. Can I buy the bypass separately and add it on? Alternate part numbers: OC-4739, OC-4739, LPD-4739. The only difference between the two? Transmission fluid is heated as it passes through the radiator, essentially removing the need for an external thermal bypass. The thermal bypass is a small added valve that goes in the transmission line. Free shipping. Im looking into getting a tru-cool 40k trans cooler and was wondering about getting the cold weather bypass kit along with it? 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 … Bump. This new cooler is 4 times the size of the old one. This cooler is rated at 40,000 GVW and measures 8.5"x22.75"x1.25". I have been told the E4OD will not get to the right operating temps if I don't run one. The thermal bypass is an added valve that goes in the transmission line. Our most popular transmission cooler from Tru-Cool™, part number LNG-47391 , has a sister cooler under part number LNG-4739 . What about using the thermal bypass valve. Tru-Cool. The Tru-Cool Max cooler fixed my customer's transmission overheat where the prior installed 10,000 pound RV cooler could not. All parts and instructions are included to mount and plumb this cooler. This cooler is a "stand-alone" cooler designed to handle the heat load by itself, but in the 99-03 Ford trucks it can be used as an add-on cooler in addition to your OEM cooler. I just had enough hose. 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. 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. This is a stacked plate, low pressure drop unit. Also what's the cold weather bypass? The 4739 comes with a thermal bypass, while the 47391 does not. 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. SKU: LPD47391. Add to the 47391 or any other cooler with 3/8" or … 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°. OIL COOLER, TRU-COOL MAX WITHREMOTE THERMAL BYPASS. Thread is 5/8" - 18 UNF 2B thread (3/8" inverted flare). Yes. This one was rated high and has a lot of cooling capacity and the price is right. I'm in NJ so it can be pretty cold in the 10-20s sometimes Side note.. It took me a couple of hours and the kit came with everything I needed. Tru-Cool 40,000 GVW LPD4739 Transmission Cooler Thermal Bypass 40K Fluid Oil 4739 Max True Long. Good mounting hardware too. The LPD4739 trans cooler includes a thermal bypass. Manufacturer: Tru-Cool. Keep your operating temperatures low, even in harsh conditions, and protect the vehicle you rely on. ivin74 and PNW VietVet like this. This is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing. Use on 5/16" & 3/8" line sizes ONLY!! When the transmission is cold, the thermal bypass will "bypass" the cooler so it can bring the transmission up to operating temperature more quickly. NOTE: OPT uses javascript to enhance and secure your online experience. Long Tru-Cool Max transmission cooler P/N LPD47391. 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? Copyright © 2021 Oregon Performance Transmission. I assume the 44k has a 4k higher capacity.. Is that overkill? Truck stays in a climate controlled environment around 68* in the winter. { Oregon Performance Transmission will NEVER sell, transfer, show or otherwise cause your email to be seen by anyone else. Includes bypass only! The Tru-Cool system then directs the ATF through the core, where it is cooled. *In the 94-97 Ford trucks, remove your factory cooler. $51.20 (5) 1 Review. Rest Easy. 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. Here in Texas, the summers get pretty hot. Heat is what kills an automatic transmission. This is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing. Tru-Cool LPD 4590 Automatic Transmission Cooler 28,000 GVW LPD4590 Fluid Oil True-Cool … This Tru-Cool Max 4739 unit is a 40K model. We sell the bypass individually under part number LNG-4739P6. 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. Upgraded line and fittings would need to be purchased separately. : //teespring.com/stores/lsxmerchFollow me on Instagram of cooling capacity and the price is right have days or below. Extracted through a cooling system for heavy duty applications, including racing lot of different on... Your Tru-Cool transmission Oil cooler heavy duty applications, including racing sold by Time2Kill on PerformanceTrucks it is cooled and... 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