Transmission Line Leak

You are leaking transmission fluid from either the fluid cooling lines that run from transmission to a separate reservoir in the radiator, or leaking from the reservoir itself. If you did damage the hose, you can get a new section of transmission hose and just replace it and use the type hose clamps I mentioned before. The automatic transmission is dependent on the fluid within it to operate properly. The bracket underneath the oil pan seems to have lost its rubber and wore a pinhole leak through the passenger side transmission line. Clean the suspected area, apply an aerosol-type white powder, such as foot powder, to suspected area, operate vehicle under normal conditions, visually inspect suspected area and trace the leak path over the white powder surface to the source. The repair on the transmission line will depend on where it is. Trans fluid is seeping out from/around where the hose is crimped onto the metal tow. Transmission Cooler Line Disconnect Tool 8875A. The first thing to check is to see if the transmission fluid is low. This is actually a common issue with this series of Escalade. I took them off and the o rings are still in place. If the transmission is damaged to a point of replacement you may want to try a good used transmission. Transmission Cooler Leak. Leak is up high on right (passenger side) and dripping down the catalytic converter. Examples of these “odd leaks” are A) casting-porosities, B) up bolt holes to the heads of bolts, and C) into the transmission. Transmission fluid can become discolored and turn a brown color similar to oil. The fluid leak can progress to a fairly rapid leak. So I noticed about a week ago the lower transmission cooler line was leaking on my 2004 tahoe Z71 5. Average failure mileage is 21,500 miles. If you didn't damage the hose while removing the crimped part you can get a good quality clamp (like the ones for high pressure fuel lines) and clamp it like that. A low transmission fluid level or various component failures of the transmission can severely damage a transmission, leading to the need for a rebuilt or replacement transmission. The trans cooling line sprung a leak in the most awkward place on the whole line. 5 (male) to 1/2" Tube - Compression (female) NOTE: Some late '06 and '07 model vehicles may have SAE size threads. Many times engine oil or other oils can blow back on the transmission making it appear that the transmission is leaking. Hazardous Liquid Pipe Failure and Leak, Marathon Ashland Pipe Line, LLC. Its not spewing about like a hose, but it does seem to have a steady drip. There's a little hole in the the crimp fitting and it's leaking from the hole. Here are the most critical pieces of information in understanding this category! Transmission oil cooler lines are typically routed along thepassenger side of the vehicle under the hood. This is not only bad for the transmission but is also dangerous if the fluid leaks on a hot pipe or other surface. In some cases the rubber section of hose can be replaced. The transmission fluid leak appears to be coming from the pan seal or gasket at the right front corner. Cooler line leaks Cooler lines and hoses connect the transmission to the cooler and are a common area for pressurized leaks. Some Comments Regarding Removing Transmission Oil Lines. Leak is up high on right (passenger side) and dripping down the catalytic converter. The transmission lines as well as the brake lines are just regular steel. If transmission fluid is present in the coolant, the transmission fluid cooler (7A095) in the radiator is probably leaking. 2001 Taurus transmission leaking Results 1 to 7 of 7 Discuss 2001 Taurus transmission leaking in the alt. Sometimes you can tell that your car is leaking transmission fluid because it will leave a trail and puddle of reddish fluid underneath the vehicle. I replaced the gasket with a new one and it Can I fill my transmission up for my Audi A4 through the top transmission cooler line?. Probably the lines would have worked just fine with the metal doing it's intended purpose. If you look at the center of the front bumper opening that is your transmission cooler. Choose Advance Auto Parts for Transmission Line Repair Kit. The sudden surges of fluid causes unnecessary strain on the transmission lines. Here’s the bottom line, if you have a programmer or power adders you must have a performance / heavy duty transmission and torque converter for your transmission to last. Should I use lucas transmission stop leak? I have a 1978 Ford ranchero that has a couple minor leaks in the tranny and I was wondering if it's safe to use this lucas stuff on my tranny? My 2000 Ford Windstar has a coolant leak. I did not have enough clearance. General Motors has issued a recall on all of its latest pickups due to a defect in the transmission oil cooler line that could cause a fire. 2010 CTSV Automatic 48k miles I lifted my car to polish my Kooks exhaust (I'm crazy like that) and noticed that the back of the driveshaft is leaking Driveshaft is leaking at the back near differential flange. It's not dripping out, it's streaming out when the engine is running. I need to replace the transmission line connector that goes to the transmission ( not the radiator ) because it is leaking at the connector. In both cases, the result is an overheated transmission that may stop functioning if the condition persists. Jump to I've seen auto trans fluid all down the bottom and side of a chevy 1500 from a forgotten "jesus clip"on a cooler line to the. Operating pressure of the transmission line should be between 3PSI and 6PSI 13. Leaking coolant is mixing with transmission fluid through the cooler lines to create a toxic hell stew that irreversibly damages everything around it. With that, the question comes whether. These holes then leak fluid. 2014 Silverado 1500, 5. This is actually a common issue with this series of Escalade. codythecarguy. There's a little hole in the the crimp fitting and it's leaking from the hole. If the line itself if leaking or split then it will have to. When I add the fluid the van runs fine until I need to add it again. In some cases the rubber section of hose can be replaced. I'm afraid my Toyota dealer won't have replacements in stock, or I won't be able to remove them to replace. The right side transmission is completely dry. Has anyone attempted to replace line before and if so is it easy. New to the forum, did a few searches and couldn't find exactly what I was looking for. Key Benefits. It is the one that goes from the transmission to the bottom of the radiator. I use their oil and it works well. As others have pointed out, the nuts for the compression fittings on these automatic transmission cooler lines are extremely difficult to loosen and remove from the radiator without breaking something, and when replacing the radiator it is best to plan on replacing the automatic transmission cooler lines as well rather than reusing them. I replaced the radiator in my Dodge Dakota and now I'm leaking transmission fluid from my cooling lines, what do I need - Answered by a verified Dodge Mechanic. The last thing is to give it a good leak check and clean of any finger prints. It's well known as it has produced dozens of products for all kinds of oil leaks. If the leak is at a coupling then the joint may be able to be tightened. Transmission fluid can become discolored and turn a brown color similar to oil. I did put some teflon tape on the ends of the fittings. get three replacement lines 3. Identifying Your Cooler Line Welcome to the world of transmission and engine oil cooler lines. However, if you have a fluid leak, you may need to replace the pan bolts, drain plugs, seals, gasket and fluid lines. Our line's leak-resistant design prevents transmission fluid loss. I am aware of two car fires that were caused by leaking transmission cooler lines. These pulses may cause the engine-mounted transmission cooler to crack and leak fluid which could result in significant transmission damage. Transmission Cooling Lines Leaking – GMInsideNews. The front union (the longer one) is the return line and is part number 90407-16009 If it is leaking at the hard line to union connection, you might be able to tighten it. For this amount, you will get a replacement of the pan bolts, drain plugs, seals, gasket, fluid lines. I need a tool for 3/8 dia. 2003 XS with 4EAT ~130,000 miles -- the stock transmission cooling lines are slowly leaking, from what I can determine at the point under the battery where the metal lines meet the formed hoses going to the radiator cooler. Also used on 1993 RS Mini Vans and 2005 Jeep Liberty vehicles. 0 Transmission Cooler Lines Leaking At Radiator: What You Need To Know? One of the critical components of your car is the transmission. Automatic transmission fluid leaks can be debilitating. When I start the truck, fluid shoots out of the leak under pressure. Then again the transmission cooler lines above that could be leaking where they connect to the transmission. Six months ago I started having problems with my 1997 Jimmy's transmission vent hose leaking fluid. If you are familiar with transmission leak sealers, you must know BlueDevil Products. Transmission cooler lines leaking at the radiator puts car owners in a distressing situation. get three replacement lines 3. I drive a 2000 wrangler, 4. When the metal lines rub against metal parts, they will chafe until there is a hole. So looks like one of my transmission cooler lines has a small leak that on a long trip undercoated a small area of my wheel well. The lower one is the high pressure line from pump to rack, and they rust out around the rubber line mount or the high pressure metal crimp that attaches the high pressure hose. Just a heads up for those of you with some miles/time on their ride, especially if you live in a snow state that uses salt on the roads. This is more common in cold weather as the rubber hose on the line shrinks and allows leaks around the factory crimp. Designed specifically to target low pressure leaks in hoses, oil pans, differentials, transmission pans, fluid reservoirs as well as plastic, PVC and metal pipes, their connections and much more!. I noticed a small oil leak coming from my truck. Alternatively, drain. I am a woman, but I can do some minor mechanic jobs. To see how frequently Land Rover LR4 problems occur, check out our car reliability stats. Fluid leak from top vent on transmission case: This problem was much more common to see on the earlier model years of this transmission but is still a potential problem that can happen. Transmission lines are also used as pulse generators. Step 5 - Remove radiator. One of the methods for finding a leak is interesting; "The Powder Method. If you didn't damage the hose while removing the crimped part you can get a good quality clamp (like the ones for high pressure fuel lines) and clamp it like that. It is in my 2002, 103" FLH. Just a heads up for those of you with some miles/time on their ride, especially if you live in a snow state that uses salt on the roads. Average Transmission Leak Cost Based on Make and Year. Automatic transmissions in certain 2005-2010 Nissan SUVs and Trucks are under attack from their radiators. Leak in Transmission Line 4 Answers. Transmission cooling lines leaking means either low-level of fluid or interrupted flow in the transmission. It ran well because you flushed it correctly. When to Get Transmission Cooler Lines Replacement. A worn-out line can break and leak under the pressure. Upon further inspection I seen oil from the cover you remove to change the oil filter. I just changed my oil and saw that there was a ton of purple fluid on the drivers side. I am a woman, but I can do some minor mechanic jobs. The clearest sign of a leak is oil on the ground under the car. The key is going to be connecting to the transmission side. The transmission cooler has nothing to do with the A/C. If the leak is at a coupling then the joint may be able to be tightened. But the line could be leaking and the fluid migrating to that fitting. Transmission fluid runs through a line made of aluminum or steel. When to Get Transmission Cooler Lines Replacement. Leaks in these areas often show up after someone has tampered with the lines. The lines look very rusty. 2010 CTSV Automatic 48k miles I lifted my car to polish my Kooks exhaust (I'm crazy like that) and noticed that the back of the driveshaft is leaking Driveshaft is leaking at the back near differential flange. To keep your transmission fluid cool, it needs to be routed through the radiator for cooling, then back to the transmission to keep it cool during hard driving. Are there any other common places for transmission fluid. By Ben Feuerherd, NY Post, October 9, 2019: The Defense Intelligence Agency worker who was arrested Wednesday for leaking classified information was passing secrets to journalists from CNBC and NBC News, a report said Wednesday. My Neon is leaking transmission oil. Though still not a small repair, getting new transmission lines can make sure that your transmission is getting the fluid it needs to operate and can be less costly than an entirely new. I figured if i just cut the fittings off and used 3/8 fuel line, would i be ok. Leaking transmission line While moving my truck today so Steph ( m0stly_harmless) could put my trailer back after his out of town move, I noticed oil in my driveway. However, if it were to get damaged because of excessive heat exposure or cluttered with debris, the line will eventually crack and then it will leak transmission fluid. Then again the transmission cooler lines above that could be leaking where they connect to the transmission. so I get my troll face on. I have a ton of them. The skid plate keeps the drips from appearing on the ground. Would it be ok to coat the outside of the fitting where the line meets the fitting with black rtv silicone to seal the leak. This kit comes complete with everything needed to get the job done right the first time. I'm guessing this would be a dealer only replacement item. Also the line is leaking too. Find 2007 Chevrolet Cobalt recalls information, reported by the NHTSA, and we will help you find a nearby service center where you can get your car fixed. In the picture below, the line that has been cut with the hose on it is the line from the left side of the radiator. What color is our tranny fluid? It doesn't smell like coolant at all and mine is pink anyway. A accident can also cause a leak to form from the lines as it can slightly bend them out of the fittings. The recall affects the 2014 Chevrolet Silverado and GMC. GM has a new part number, and admit they know there is an issue, but refuse to take care of it. Transmission fluid runs through a line made of aluminum or steel. The last thing is to give it a good leak check and clean of any finger prints. The cause of your leak is probably a failure of one of the seals that keep the oil inside the transmission (though there are other places the transmission might leak). Lucas Hydraulic Oil Booster & Stop Leak was formulated to renew hydraulic fluid with an additive package that stops seal leaks, boosts pressure, reduces operating temperatures and increases the life of hoses, rams and cylinders. DORMAN – OE REPLACEMENT TRANSMISSION LINES. Upon further inspection I seen oil from the cover you remove to change the oil filter. Product Features: Includes all hardware needed for a complete repair (where applicable). 2 OHV and 4T40E transmission The old radiator was cracked already at the plastic tank and the transmission cooler lines were leaking slowly at the rubber hose crimp. With that, the question comes whether. Its the place where two lines are right next to each other. If your transmission lines are leaking in your radiator you should be able to see the transmission fluid (BRIGHT RED) in your overflow tank. An automatic transmission fluid leak may develop from the rubber section of a transmission cooler line. Common reasons for a transmission fluid leak are: Any recent service or part replacement that involves disconnecting cooler lines like a radiator replacement or a transmission flush; Worn seals or gaskets; Damaged bell housings; A loose transmission pan. The first thing to check is to see if the transmission fluid is low. NAIOA - Forums - Transmission Line Leaking - One of my transmission lines has started to leak. if its leaking from the hose, replace that stupid spring clamp with a regular hose clamp. The cause of this problem is the upper channel plate gasket. To keep your transmission fluid cool, it needs to be routed through the radiator for cooling, then back to the transmission to keep it cool during hard driving. See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. Transmission fluid may leak from seals, gaskets, lines, and fittings. Transmission cooling lines leaking means either low-level of fluid or interrupted flow in the transmission. It is the one that goes from the transmission to the bottom of the radiator. The way that the transmission fluid is checked is from a hole usually located on the. The transmission cooler line on about 97,000 of the above vehicles can transmit high pressure pulses when the vehicle is operated at heavy loads. That’s right, the transmission. Transmission fluid is leaking out of my transmission vent tube. Sometimes you can tell that your car is leaking transmission fluid because it will leave a trail and puddle of reddish fluid underneath the vehicle. Its under the engine on top of the crossmember. But of course your transmission can also leak some oil. So, as soon as the transmission cooler lines at the radiator of your car are starting to leak, you should immediately take necessary steps to prevent a further issue from arising. 2014 Silverado 1500, 5. If the line itself if leaking or split then it will have to. I have the 4R70W transmission. The sudden surges of fluid causes unnecessary strain on the transmission lines. Make sure your Honda Civic is free of transmission leaks with the options below. 2006 chevy silverado hd diesel with allison trans-- transmission cooler lines leaking, dealer said there has been no known problem. I changed the radiator and the bottom drivers side steel transmission hose is bleeding transmission fluid out when I start the engine. It is an inexpensive solution to most hydraulic problems and a perfect preventative maintenance product. When the fluid is identified as transmission fluid, the vehicle is raised, and the transmission, transmission cooler lines, and transmission cooler are inspected for leaks. that makes a total of 2 o rings in each femal. Leaving tomorrow for a 5 day camping trip and need to pull the trailer. Most gas transmission lines are made of coated steel and damage to its protective coating is likely to cause a corrosion leak in the future. I’ve been adding a little fluid in every now and then to keep it full but now I’ve stopped driving it for the winter. Transmission cooler line leaks. Has anyone experience leaks in the transmission cooling lines? If so, any insight into what might have caused it? 2017 R has only 6500 miles. What color is our tranny fluid? It doesn't smell like coolant at all and mine is pink anyway. Choose Advance Auto Parts for Transmission Line Repair Kit. 717( a,b,c ) –Each permanent field repair of a leak on a transmission line must be made by – –(a) Removing the leak by cutting out and replacing a. For this amount, you will get a replacement of the pan bolts, drain plugs, seals, gasket, fluid lines. Also used on 1993 RS Mini Vans and 2005 Jeep Liberty vehicles. Has anyone attempted to replace line before and if so is it easy. 5 (male) to 1/2" Tube - Compression (female) NOTE: Some late '06 and '07 model vehicles may have SAE size threads. Types of Transmission Line. My 2011 Jeep Grand Cherokee with 47,500 miles has a leaking transmission cooler. Your car may have a transmission fluid leak for a variety of reasons, but before we talk about why you have a transmission fluid leak, it’s important to talk about how to identify one. btw, you cannot double flare stainless tubing. Chrysler uses a combination transmission AC condensor cooler. Upon further inspection I seen oil from the cover you remove to change the oil filter. After 30 seconds, turn the car off and look for leak traces of red transmission fluid on the paper and the steel lines. As the leak can be related to all three of these parts, more repairs than just replacing the line can be necessary. Ford Transmission And Driveline And Ford Transmission Cooling Lines Ford Transmission Cooler Lines, Stainless Steel, FMX 289, Galaxie, 1966. I believe it is a transmission coolant line, located in front of the lower half of the radiator. As of December 31, 2015, a natural gas leak outside of Los Angeles at Porter Ranch, was releasing 110,000 pounds per hour for at least two months. If the leak is at a coupling then the joint may be able to be tightened. If it's like a standard GM transmission the connection at the transmission is going to be a special flange type connection. So before this gets really bad I ordered new lines and they arrived today, tomorrow night I will attempt the install and was wondering if anyone has tried before and could give me some pointers. I have the problem on my '05 Expedition of not being able to pull the rusted and leaking transmission cooler line from the radiator. See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. Leaking fluid will be red. Leaky Torque. Its the place where two lines are right next to each other. Hopefully, it's only the lines and may just need tightening to stop the leak. The vehicle was taken to a dealer, where it was diagnosed that the transmission fluid line was leaking and needed to be replaced. Step 5 - Remove radiator. A couple months ago I had the transmission cooling line replaced because of a leak. Looks like you would need to replace the entire lines from the cooler back to the transmission. The p0700 is a generic trans code, some cheap scanner wont pull hard trans codes. These holes then leak fluid. The stock transmission cooling lines are 5/16". Should I use lucas transmission stop leak? I have a 1978 Ford ranchero that has a couple minor leaks in the tranny and I was wondering if it's safe to use this lucas stuff on my tranny? My 2000 Ford Windstar has a coolant leak. It is probably the second most important thing after the engine because if the transmission isn’t working right, then the vehicle can not be driven. Leak is up high on right (passenger side) and dripping down the catalytic converter. I can't hardly believe the steel line is leaking. It looks like it is collecting around the pan, but also forward. Can someone confirm this? How difficult is it to replace? The image is looking through the grill at the lower driver's side. The vehicle was not repaired. The trans cooling line sprung a leak in the most awkward place on the whole line. Transmission cooler line leaking transmission fluid at an aluminum crimp that connects a rubber hose to the transmission cooler; an inferior design. 2 with a leaking transmission. There are two lines to the radiator's reservoir. The wicking action seals hard-to-reach leaks without the need for disassembling or removing parts. We rely on our cars every day to get us where we need to be. I have a leak coming from the crimped end of a rubber line going to the metal line for the transmission. Plus, its robust construction readily defends against possible damage from road debris and corrosion. Easy to use parts catalog. Still leaking. Transmission fluid is circulated at a fairly high pressure, so you're going to need a rubber hose that can withstand both high temperature and pressure. Since 1918, Dorman Products has supplied the automotive aftermarket with high-quality replacement parts, hardware and fasteners. com is the most qualified transmission supplier in the country. If transmission only leaks while engine is running most likely the front pump seal or one of the side piston seals. Lines, Kits, and Coolers, LBZ 10207 bundle Transmission Cooler Line Repair Kit, LBZ LMM, 2006-2010 Duramax Install our repair kit for a no hassle repair you wont. Perform oil leak checks after inspecting the condition and level of the automatic transmission fluid. The return line is via the straight hydraulic line going from right to left across the top of the photo. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. CUSTOMER SATISFACTION NOTIFICATION L05 TRANSMISSION OIL COOLER LINES Dear: (Name) At Chrysler Group LLC, you can be assured that we are changing the way we look at quality. I replaced the radiator in my 97 GMC Sierra yesterday and after a short test drive I see a lot of transmission fluid all over the place under the upper fitting. Fluid leak from top vent on transmission case: This problem was much more common to see on the earlier model years of this transmission but is still a potential problem that can happen. Is it possible the leak is actually out of the transmission mainshaft seal and not the primary?. This is not only bad for the transmission but is also dangerous if the fluid leaks on a hot pipe or other surface. As these trucks are getting a few years older, the transmission cooler lines can start to develop leaks. After having the car towed home I crawled under and discovered the rear transmission line fitting leaking all over the place. the 1st time I had it replaced under the TSB and it was leaking in the exact same place, I'm at 126K miles and Chrysler told me I was out of the warranty period even though they were replaced at 45k miles. oil drips in my "path. This, of course, includes everything from the long commute to work to simply running errands around town. Should I use lucas transmission stop leak? I have a 1978 Ford ranchero that has a couple minor leaks in the tranny and I was wondering if it's safe to use this lucas stuff on my tranny? My 2000 Ford Windstar has a coolant leak. So I discovered some fluid on my new concrete. If the leak is at a coupling then the joint may be able to be tightened. Most of the time they are, but then there is the following. For the diy guy or girl, u will need a small pipe cutter, the line is 3/8. Yes its leaking between the engine and transmission. Anyway, I've gone round and round trying to find the part. Apparently, on one side of this seam is a seal for the transfer case and on the other side is a seal for the transmission. Find Automatic Transmission Cooler Lines and get Free Shipping on Orders Over $99 at Summit Racing!. What color is our tranny fluid? It doesn't smell like coolant at all and mine is pink anyway. Transmission cooler lines leaking at the radiator puts car owners in a distressing situation. Transmissions often leak from a loose pan, caused when bolts aren't properly tightened after a filter is changed. Still leaking. Once you've removed the stud you can often see traces of tranny oil very close to the outside of the thread of 7/16 (I can see tranny oil leaking from studs before cleaning this transmission) 7/16-14 thread in the case. Looks kinda easy since it's the lower line on the transmission. With the hoses carefully routed, tighten each banjo bolt securely. If old transmission cooling lines are leaking, that might not be happening, so you can replace the lines in your 1966 Mustang with a C4 transmission with these new stainless steel. So the lines to the transmission cooler on my 2009 Silverado are starting to leak quite abit more than usual and I want to get this fixed asap. The fluid was necessary to dissipate the heat. Leaking coolant is mixing with transmission fluid through the cooler lines to create a toxic hell stew that irreversibly damages everything around it. GM will not cover under power train warranty. the 1st time I had it replaced under the TSB and it was leaking in the exact same place, I'm at 126K miles and Chrysler told me I was out of the warranty period even though they were replaced at 45k miles. 2014 Silverado 1500, 5. DON'T exceed specified torque for flange bolts (see Table VI). The automatic transmission is dependent on the fluid within it to operate properly. 9L Cummins takes you a long way in protecting your transmission. I have to add about 1 qt. The torque pump is a common source of leaks in this area. Federal report on fatal Firestone explosion blames gas leak, government approval to build homes without pipeline maps The April 17, 2017, blast killed Mark Martinez and Joy Irwin, and severely. So I took so plumbers tape and slapped some on. I am asking to see if someone thinks changing the pan won't cover the leak. Transmission lines leaking at the transmission cooler. After driving the car on a 150 mile trip the transmission started shifting hard and acting poorly. Leaks are not included in any of those lists. A worn-out line can break and leak under the pressure. I have a leak on the lower transmission cooler line in my '94 Grand Am 4T60E. the last which is most annoying, the transmission leaking. If you had done that and put more green in, it would have been the same story, perfectly fine. Any ideas on if I did anything wrong or what might be done to eliminated the very slow leak?. Transmission fluid runs through a line made of aluminum or steel. Although they were both under the General Motors umbrella, at the time they acted as completely separate entities, whereas now the developers at General Motors powertrain work only for GM, not Chevrolet or Buick. MaxLife Transmission Stop Leak features special seal conditioners that help restore old seals and protect them from hardening. After having the car towed home I crawled under and discovered the rear transmission line fitting leaking all over the place. Mild build, (111HP/119TQ). If the Snap-In fitting, item # D13035, or the OEM transmission line snap fitting is removed from the radiator on your 2006 Chevrolet Silverado, you will leak some transmission fluid that will need to be replaced. Most DIY people think that transmission lines are simple little lines that should take you about a minute to remove. Will "patching" in rubber line work temporarily?. Designed specifically to target low pressure leaks in hoses, oil pans, differentials, transmission pans, fluid reservoirs as well as plastic, PVC and metal pipes, their connections and much more!. Continue reading to learn the typical causes of fluid leaks, the average repair bill, and how to prevent damaging your vehicles transmission. I just changed my oil and saw that there was a ton of purple fluid on the drivers side. they are the lines with the clips in them, at the transmission it actually looks like transmission would have to be lowered to gain access where they go in tranny. The automatic transmission is dependent on the fluid within it to operate properly. Although there are multiple places on a vehicle where transmission fluid can leak, the 3 most common include: Pan gasket; Cooler lines; Output, tail, or torque converter seal. I found the cooling lines corroded and leaking. Transmission fluid lubricates each component of your transmission. Also the puddle under your car should be a red and green mixture kind of going everywhere. When to Get Transmission Cooler Lines Replacement. Transmission Leaks: What Causes Them and How To Fix Them. At the time I was leaking fluid I was unsure really to what exactly was leaking. Has anyone attempted to replace line before and if so is it easy. they are the lines with the clips in them, at the transmission it actually looks like transmission would have to be lowered to gain access where they go in tranny. I took them off and the o rings are still in place. Leak is up high on right (passenger side) and dripping down the catalytic converter. Checking for leaks isn't as trying as it may seem. (Is this a pressure relief point in case the transmission filter is clogged?). Anyway, I've gone round and round trying to find the part. If the leak is at a coupling then the joint may be able to be tightened. Upon further inspection I seen oil from the cover you remove to change the oil filter. S10 Blazer Transmission leak. Get threerubber lines and new connectors from Alligator. I recently purchased a 1997 4door with 4wd and 5-speed manual at roughly 120,000 miles. When I add transmission fluid, it leaks out below. I have a 2007 Silverado Classic 1500 Crew Cab with 69000 miles on it. I've got a 2001 3.