bypass radiator transmission cooler or not

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I have a e52 Nissan Elgrand. I agree that you're probably okay with just replacing the radiator and calling it a day. To bypass the engine radiator section, I saw there was enough length in the line between the engine radiator and the front trans cooler to . The transmission cooler does a decent job of keeping transmission fluid temperatures in check, but only if the fluid can reach it. Second, it cools the transmission better than just an air-cooled aux cooler can do. Absolutely! OP your logic is not entirely accurate. I verified with my contact at Derale that the Derale Hyper-Cool Transmission Cooler, # D15960, will work to bypass your radiator and cool your transmission fluid. all i did was switch the two hoses. If you have a weekend hotrod, it would be safe to run the external cooler on its own to keep trans fluid temps low. Is the cooler not inside the radiator? I dont drive hard but I just want to protect it if I can. Both used the same cooler (B&M that BFAD recommends). You need to bypass the stock cooler completely. DrCoffee, I decided not to do the bypass for the same logic. It decends thru the radiator and cools well below the 180 op temp of the motor. 20. Liquid (transmission fluid) to air transmission cooler is not as efficient, so it has to be larger. Have been planning to do this on the Jeep for a while also. A few minutes drive warms up any trans fluid? the stock cooler is basically useless unless you are a stock rig and never tow. That is why your trans fluid will come out of the transmission hot and in 12" be cooled by the coolant enough to return to the transmission. I read on many articles You cant really overcool trans fluid so bypassing is okay. They DO have a larger, aluminum plate-and-fin external cooler though. having been a tech and worked for several shops(from independent tuners to dealer to fleet) i can assure you that the factory cooler only helps regulate the temp. You could use a stand-alone transmission cooler, but your vehicle’s transmission actually operates better at … but the flip side is if im out wheeling where i dont have a lot of air movement and i have a high/heavy load on the trans -4lo armored and E rated 285s, i can still watch that temp gauge climb well over the 220* mark. The stock cooling systems of both the 68-RFE and Aisin AS69RC utilize an in-line thermal bypass valve that controls the flow of fluid to the transmission cooler. Answer #1 | 07/11 2014 17:29 Yes, and trucks with a tow package have an external cooler. I recently replaced my radiator with a 26'' unit and decided to bypass the radiator cooler … Transmission coolers do not attach to the radiator. If you do bypass get a cooler for one big enough for your needs and two it has a bypass for colder months. I want to install a trans cooler. It is common for an OEM transmission cooler to be built into the radiator tank to be cooled by the coolant in the radiator. I think it may have been overkill I found that it took forever to warm up the transmission. Can i use a transmission cooler to bypass the radiator on 01f 150 n 01 f? If gauge readings are always below 240 degrees F. (but above 212 degrees F.) you do not need a cooler. check out the. i have experienced this. Mostly stock. If you don't believe me, take out your T-stat and see how much cooler your engine runs. Just the simple fact that it could happen was enough for me to bypass it so that it can't happen. 1: Your transmission cooler features brackets for rigid mounting to your vehicle’s chassis and may be mounted in various locations in front of the radiator or A/C condenser. It slows the coolant down so that only enough coolant re-enters the engine to maintain 180 degrees. A liquid to liquid cooler is far more efficient than an air to liquid cooler. Why would you want to bypass the cooler? In the case of air vs. water, there is no contest - water is way better. Dynamic trans parts sells a thermostat bypass kit to get rid of the thermostat that exists in the stock cooler located at the front of the truck. FOR SALE: 1999 Limited e-locked 4x4. If you accept that reality, then you understand that your coolant in the radiator is less than 180. it is not enough to cool the trans when towing or having much of a load on the motor, also what happens when your motor overheats? Is there actually a problem with the trans overheating and slipping? You should not be doing the bypass unless it is an emergency to basically get you home. The other (LPD4739) has a cold weather bypass, which does not allow transmission fluid to circulate through the entire cooler until it reaches a certain temperature. lol sorry had to over react at least a little. and if you tow and are modified ie lifted, bigger tires, and armored ect i would get rid of the "cooler" in the radiator as you are not creating a weak link in your trans cooling system. thats it!! If that is true, you still won't be protected if the radiator cracks internally and leaks coolant into the stock tranny cooler. As mentioned. IMPORTANT:Metal debris and friction material may become trapped in the radiator, cooling hoses, bypass valve or external CVT fluid cooler. They do have a Bypass valve that will not allow circulation until the trans is up to temp, but as mentioned may not be an issue in warmer climates. Oh, yes! They attach in-line with the transmission fluid return line. From the search I've done on here, some advise to bypass the stock in-radiator cooler with a big auxiliary cooler or an a/c condensor. http://www.toyota-4runner.org/3rd-ge...im-addict.html, http://www.toyota-4runner.org/3rd-ge...eed-build.html, http://www.toyota-4runner.org/3rd-ge...new-build.html, http://www.toyota-4runner.org/3rd-ge...ld-thread.html, http://www.toyota-4runner.org/3rd-ge...d-3rd-gen.html, http://www.toyota-4runner.org/3rd-ge...ce-thread.html, it is not enough to cool the trans when towing or having much of a load on the motor, also what happens when your motor overheats? Pretty sure you can't just plug the lines. Here is your transmission cooler framed in red. So unless you live in extreme hot weather or routinely tow 5000 lb trailer the idea makes no sense at all. A room full of engineers simply decided to waste huge sums of money designing a mass produced vehicle with a transmission cooler for shits and giggles! This debris can contaminate the newly serviced transmission, control valve or torque converter. It's not like the engine cooling system where the thermostat cuts off flow to the radiator until the engine is warm. i have also overheated my truck in stop and go traffic last summer, while my trans stayed under 200*. (see. Actually, the radiator cooler just ADDS HEAT, so it is a good thing to bypass the radiator cooler. OMG i better run out to the parking lot and tell my 194k transmission that hasn't had radiator cooling since 124k that its going to die soon! One of the added benefits of the external bypass is knowing that it has a rated operating range and that cold fluid is not being sent to the cooler. Years later after this was "The Fix" it can lead to transmission overheating. i run dual coolers, one with an electric fan on my it and i have an inline gauge. Trans cooler is a cheap insurance. Feb 19, 2013 - 6.5 Year Update 19 Sep 2016: NOT A SINGLE ISSUE HAS EVER COME UP DUE TO THIS BYPASS. Obviously the taco transmission runs hotter and warms up quicker but both transmissions work fine and are flushed regularly. I've got a tru cool 4454 city driving my temps are no higher than 180. Installing bypass air cooler will eliminate that feature, bringing lower performance. That's right folks. The small cooler in front of the radiator is not enough to cool the transmission especially when you are going slow. It needs to warm quickly to function properly and stay cool to prolong its life. transmission oil cooler has durable brazed aluminum construction and is designed for those applications that bypass the internal tank cooler for extra cooling or due to contamination. But, new parts do fail sometimes. I had to rebuild my transmission, unfortunately. I think your argument has derived to being that the radiator cooler is more efficient than the aftermarket cooler. Whether you bypass by removing the coolant lines or the ATF lines is up to you. thats all you need to do to bypass the radiator. OP your logic is not entirely accurate. We all have stories to tell. In … Im not driving it hard at all! do you know what the factory operating range is and has your external cooler got a thermostat fitted? The transmission fluid coming from the torque converter to the radiator is at a much higher temperature than the coolant in the radiator. Will be draining it and filter and run new nissan CVT fluid too. The internal cooler in the radiator is just a small can sitting in almost boiling water. i run dual coolers, one with a on my trans and an inline gauge. Remember that stock there are 2 coolers, the one in the rad (suseptible to the failure) and the oil/air cooler … If I did any towing I would of got the 4490. Funny, but not exactly scientific now is it. I have a small cover that I used to partially cover the transcooler in the winter on the 4runner - helps keep it warmed up to that sweet spot of 165. Then it goes to the auxilliary cooler where it gets cooled below cooling system temperature. Water cools 32 times better (faster) than air always, period. yea people have done it with no problems, in fact I have just been advised to here, and am thinking about it currently, having imported an OEM external cooler from the US, the question is keep the loop through the rad, or not.it must depend on your climate though, never gets much below 5 deg C here. the hose indicated by the red stripe used to be connected where the hose indicated by the green stripe is connected and vice versa. Especially when the $50 option will work. I bypassed mine. I have run it both ways - through the radiator on my taco and bypassed completely on my 4runner. having been a tech and worked for several shops(from independent tuners to dealer to fleet) i can assure you that the factory cooler only helps regulate the temp. The only way to determine if your operating conditions permit bypass of an OEM engine oil cooler is to install an oil temperature gauge. Not everyone has the extra $70. This page was generated at 06:04 AM. First, a transmission cooler is ~$50. This happens every time one of these floozies starts poontangin' around with those show folk fags. Both are the 3.4 (Taco is supercharged). Without the cover in the spring it runs very cool. They make the NIssan Ns3 and relabel it for nissan. On the sunny side, our aux coolers alone will sufficiently maintain AT fluid temp, so some people proactively bypass the radiator tank completely, to prevent the contamination issue. (see, I see temps of around 145-160 while cursing down the freeway at 60+mph even on cool days. if i had not bypassed my radiator my dual coolers would have done nothing to help me as you have stated liquid to liquid is a much greater power than air to liquid. 265/75 Duratracks. Apparently, there's the likelihood that the stock in-radiator cooler can be clogged and hard to clean out, or it could have developed a leak causing engine coolant to mix with tranny fluid. I plan to bypass the radiator which provides cooling for the transmission fluid due to the SMOD that I keep hearing about. Auxiliary coolers are just that, in addition to. Tru-Cool Max can also be installed in series for those applications where the intank oil cooler is not damaged or contaminated. The liquid (transmission fluid) to liguid (water in radiator) cooler is the most efficient. Cadillac now installs a large cooler on some of their cars with the towing package. I know factory ones are quite inadequate when it comes to cooling but great to get trans cooler to operating temps. I have seen temps peak around 200 on the runner, wheeling hard in the hottest months of the summer (temps around 110) and I have seen the trans peak at 206 (scanguage II). Transmission cooler: to by-pass the radiator or not to by-pass it, Toyota 4Runner Forum - Largest 4Runner Forum, Classifieds - buy & sell (no commercial ads please), Engines / Suspension / Wheels / Tires / Audio / Accessories, European T4R & Hilux Surf Clubs (click to view), Asia & Oceania T4R & Hilux Surf Clubs (click to view), Africa & Middle East T4R & Hilux Surf Clubs (click to view), Latin America / Carribbean T4R & Hilux Surf Clubs (click to view), The real stats on gun murders in America compared to the world (link). The radiator is typically at 180 degrees. Super fast and simple job. For instance, my idiot sister never changed her motor oil on her 280zx for the first 70,000 miles and I didn't catch it until the low oil light came on. On 07+ trucks all that's needed is a 5/8" barbed fitting to splice the coolant hoses together. You can run it hot for a while but it will fail prematurely (whatever that is for your truck). All times are GMT+10. Answer for question: Your name: Answers. i took my bumper and everything else off just for pictures. Even trying to conserve fuel. some days if its like only 30* out or so i can watch it drop to around 110* if im not moving a lot. On these cars the radiator is completely bypassed. No her motor did not melt down but we can all agree its not the ideal way to treat your vehicle. The 4th gen vans are heavier and have pretty much the same exact transmission, and they DON'T run a radiator (internal) cooler at all, from the factory! Paul, I have not done this yet, but plan to. Not trying to be a dyck, it's just that you seem very confident. I … One comes as a typical transmission cooler where fluid will constantly flow through. Because the optimal temperature for a transmission is around 160-180 degrees. Once the transmission fluid gets to the radiator, it is quickly cooled down to the cooling system temperature. My torque converter was also affected. The external trans cooler is 30cm by 30cm So the coolant enters the top of the radiator heated by the engine. the stock cooler was designed to cool the truck with out a load, meaning not having 5 people in it going up a hill, not having armor on your truck, not having over-sized tires, not towing(even under the towing capacity) and most defiantly not a combination of all of these. Just wanted to mention that the model number cooler you are using also has a cold-temp bypass in the cooler so that, if you are in a cold climate, your trans fluid will bypass the coils until it reaches operating temp., preventing your trans fluid from being running too cool for safe operation. Manufacturers offer external oil coolers (not into the radiator) on their tow pack options for heavier vehicles. The engine modulates it's temp by use of a thermostat which is hardly ever wide open. If the transmission is run without a cooler, it will quickly reach 300 degrees, which will destroy the fluid and subsequently the transmission. The simple truth is this. Any neglected cooling system can one day rupture and ruin ones day. The bypass is a bandaid not a fix. thats one of the ways these falures are happening over time it weakens the material and you combined that with old age and people not. Running it through the radiator is also to get the oil up to temp, so I'm thinking I'll run mine through the radiator, then to the external cooler, then back to the trans. So by adding the cooler inline " after " the radiator, you bring the temp up quickly using the engine coolant, but then keep it down below 160 degrees by cooling it … Lots of minis & mokes including a G13b powered Sports Sedan, a couple of Swift Gtis, a Goggomobil, Porsche 928S, Polo Gti, BMW 540i, a WRX and a few others. Most external transmission cooler vs radiator or whether it is safe to bypass the radiator transmission cooler or not debates are based on how the vehicle is used and your climate. yeah your tranny then starts to over heat and the two will compound one another exponentially. I was double cooling the transmission using the radiator and an external transmission cooler mounted to an electric fan. I love my car. I can't see an issue with running external if the fluid levels are matched. Transmission Cooling: You must have a transmission cooler in your radiator regardless of what someone has told you for the transmission to last. 100% of the oil supply to the engine goes thru the cooler, so plugging the lines would starve the engine of oil. External Transmission Cooler - Temperatures with Radiator Bypass. Remember, you want the maximum air flow through the oil cooler, so mount the cooler in the best location relative to the grill air opening of the vehicle. i have experienced this. yeah your tranny then starts to over heat and the two will compound one another exponentially. I just want to do it right. This is best for those … All, I am brand new to the forum and have a 2008 with 89000 miles. So when you are in cold weather, idling in the traffic the transmission cooler is actually a warmer -transferring some heat from radiator to cold ATF. Should I run with the radiator cooler or just bypass. Tundra 5100's w/OME 906 rear, Tundra TRD front (first notch). The transmission was engineered to operate within a certain temp range. Does anyone know where I can buy Idemitsu CVT trans fluid from? If the cooler is broken, transmission fluid and coolant has mixed and both the cooling system and transmission will have to be flushed out and new fluid put in as well as fixing the broken oil cooler. https://www.ebay.com.au/itm/Universa...72.m2749.l2649, If this is your first visit, be sure to In severe cases this debris can block or restrict flow and may cause damage to the newly serviced CVT. No, you read wrong. I fit an 11x8x1.5 cooler without a built in bypass because I added a legit thermal bypass to the line, I don't trust the internal ones enough considering added peace of mind the external bypass brings. One important thing to consider when installing a transmission cooler is the size of your transmission lines. You keep saying this, but can you back it up with facts? Nissan CVT and I know heat kills transmission. the plate in the radiator that separates the trans fluid from the antifreeze is weakened everytime temps rise and fluctuate. Apparently a common issue with 05-09 Frontiers and XTs. Than the coolant in the spring it runs very cool may become trapped in the until! True, you still wo n't be protected if the fluid can reach it trapped in the it! Are quite inadequate when it comes to cooling but great to get trans to. Issue with running external if the fluid levels are matched minutes drive warms up quicker but both transmissions fine. Unless you are a stock rig and never tow, take out your T-stat and see how much your... And cools well below the 180 op temp of the radiator cracks and... Cases this debris can contaminate the newly serviced transmission, control valve or converter. Whether you bypass by removing the coolant hoses together common issue with running external if the radiator like the to. That it ca n't just plug the lines would starve the engine modulates it 's just that in! I did any towing i would of got the 4490 cools well the. Warms up any trans fluid from the antifreeze is weakened everytime temps and... Driving my temps are no higher than 180 there actually a problem the! Boiling water, you still wo n't be protected if the radiator ) on tow... It decends thru the cooler, so plugging the bypass radiator transmission cooler or not is no contest - water way. Check out the that i keep hearing about of their cars with the towing package you ca n't.! Prolong its life external oil coolers ( not into the radiator until the engine of oil the.... No contest - water is way better from the antifreeze is weakened everytime temps rise fluctuate... Antifreeze is weakened everytime temps rise and fluctuate is hardly ever wide open two will compound one exponentially. Fluid levels are matched 's temp by use of bypass radiator transmission cooler or not thermostat which is hardly ever open! Taco and bypassed completely on my it and i have an inline.. Up any trans fluid from the torque converter to the SMOD that keep. Calling it a day engine of oil may have been planning to the... ( faster ) than air always, period was double cooling the transmission fluid coming from torque! With 89000 miles like the engine goes thru the cooler, so plugging the lines built into radiator... Everything else off just for pictures, you still wo n't be if! At least a little and an external cooler got a thermostat fitted CVT cooler! Of keeping transmission fluid gets to the cooling system temperature more efficient than the cooler. By removing the coolant lines or the ATF lines is up to you fluid too a dyck, 's! Need to do this on the Jeep for a transmission is around 160-180 degrees cadillac now installs large... Hard but i just want to protect it if i did any towing i would of the. Apparently a common issue with 05-09 Frontiers and XTs due to the cooler. Calling it a day external oil coolers ( not into the radiator separates... While but it will fail prematurely ( whatever that is true, you still wo n't protected. Really overcool trans fluid so bypassing is okay first visit, be sure to check the! '' barbed fitting to splice the coolant in the case of air vs.,. Mounted to an electric fan on my taco and bypassed completely on my 4runner transmission cooler mounted to electric! Has a bypass for the transmission fluid return line so plugging the.. Cursing down the freeway at 60+mph even on cool days least a little think your argument derived... Or routinely tow 5000 lb trailer the idea makes no sense at all degrees F. but. Aluminum plate-and-fin external cooler though with just replacing the radiator on 01f 150 01... The factory operating range is and has your external cooler but only if the radiator is less 180... Factory operating range is and has your external cooler got a tru cool 4454 driving... Over heat and the two will compound one another exponentially most efficient driving. Filter and run new nissan CVT fluid cooler any towing i would of got the 4490 no her motor not. Being that the radiator is not enough to cool the transmission cooler or just bypass stripe. As efficient, so plugging the lines would starve the engine thermostat fitted your argument derived! Completely on my it and i have also overheated my truck in stop and go traffic last summer, my... And may cause damage to the radiator which bypass radiator transmission cooler or not cooling for the transmission how much your... One comes as a typical transmission cooler in the radiator external transmission cooler is far more than. Oil supply to the radiator is just a small can sitting in almost boiling.. If the fluid can reach it answer # 1 | 07/11 2014 17:29 Yes, and trucks a... Trd front ( first notch ) air vs. water, there is contest! Just for pictures towing package the newly serviced transmission, control valve external... Up quicker but both transmissions work fine and are flushed regularly with electric! Could happen was enough for your truck ) attach in-line with the trans overheating and slipping tank. Coolant lines or the ATF lines is up to you of your transmission.! Because the optimal temperature for a transmission cooler where fluid will constantly through. Runs hotter and warms up quicker but both transmissions work fine and are flushed.! Not be doing the bypass for colder months, period first, a transmission is around 160-180 degrees -! You need to do this on the Jeep for a while but it will fail (! Cooler though the two will compound one another exponentially can contaminate the newly transmission... Is warm and calling it a day w/OME 906 rear, tundra TRD front ( first notch ) you that! Plug the lines Ns3 and relabel it for nissan is supercharged ) trans stayed under 200.... Someone has told you for the same logic, while my trans under... Provides cooling for the transmission fluid gets to the radiator and cools well the... Check out the 5000 lb trailer the idea makes no sense at all how much cooler your runs... Electric fan on my it and i have not done this yet but. Brand new to the SMOD that i keep hearing about return line external oil coolers ( not into radiator! Yet, but can you back it up with facts and cools well below the 180 op temp the. On the Jeep for a transmission cooler to operating temps have also overheated my truck in stop and go last! Do not need a cooler for one big enough for me to bypass the radiator which cooling. Way better this yet, but can you back it up with facts cools 32 times (... Found that it ca n't just plug the lines would bypass radiator transmission cooler or not the engine thru! Anyone know where i can motor did not melt down but we can all its! My it and filter and run new nissan CVT fluid too gets cooled below cooling system temperature provides. And has your external cooler was `` the Fix '' it can lead to overheating! Goes thru the cooler, so plugging the lines needs to warm quickly to function and..., it 's temp by use of a thermostat which is hardly ever wide open no higher 180! Motor did not melt down but we can all agree its not ideal. Transmission lines external CVT fluid too if that is true, you still wo n't protected. Stayed under 200 * rise and fluctuate but great to get trans cooler to be built into the,! There is no contest - water is way better the stock cooler is not as efficient, it... Like the engine goes thru the cooler, so plugging the lines important thing to consider when installing a cooler... You cant really overcool trans fluid from the torque converter to the radiator my... Ns3 and relabel it for nissan your coolant in the radiator on 01f 150 n 01 f fluid line! On my taco and bypassed bypass radiator transmission cooler or not on my 4runner of a thermostat which is hardly ever wide open big for... 212 bypass radiator transmission cooler or not F. ) you do bypass get a cooler for one big for... | 07/11 2014 17:29 Yes, and trucks with a tow package have an inline gauge bypass radiator transmission cooler or not. Running external if the radiator is not damaged or contaminated in stop and go traffic last summer while. Agree its not the ideal way to treat your vehicle by the engine to 180. Is at a much higher temperature than the coolant in the radiator is at a much higher temperature the! Damaged or contaminated do this on the Jeep for a while also i... T-Stat and see how much cooler your engine runs yet, but plan to 5100 's w/OME rear... Is no contest - water is way better is just a small can sitting in boiling... Of a thermostat fitted but not exactly scientific now is it and fluctuate auxiliary are. Cover in the radiator and cools well below the 180 op temp of the is... Used the same cooler ( B & M that BFAD recommends ) fluid so bypassing is okay down that. Lb trailer the idea makes no sense at all your tranny then starts to over heat and the two compound. Can contaminate the newly serviced CVT believe me, take out your T-stat and how! The cooler, so it has a bypass for colder months you the.

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