The Merchant Automotive 10206 Transmission Cooler Line Repair Kit for your 01-05 GM 6. Bypassing Factory Transmission Cooler on a 2006 Nissan Pathfinder Question: I am looking at installing a transmission cooler to completely bypass the factory tarnsmission cooler that is built in to the radiator as a preventative measure. This will probably outlast OEM up here, but I won't be going back to that quick change crap, especially since Ford doesn't make them available. Fix your leaking transmission lines with these heavy duty, high flow, flexible transmission lines. Both of my Transmission Cooler Lines are leaking at the metal banded crimped portion of the lines before they go into the radiator. The 2012 Dodge Grand Caravan has 1 problems reported for transmission cooler line(s) leaking. I am not sure if it has came loose or if it may have a pinhole in it somewhere. For example, the two most common reasons for transmission fluid leakage are: 1) A worn or a broken seal can cause the transmission to leak. I have a 2005 SAAB 97x with the 4. If you are not familiar with the way this transmission is designed in the F150, refer to the diagram. The 2012 Chevrolet Cruze has 7 problems reported for transmission leaking fluid. Both cooler lines are leaking and I am about to embark on their replacement. I had the right drive axle seal replaced, anyway that is what was on the RO. As these trucks are getting a few years older, the transmission cooler lines can start to develop leaks. The good news is that usually the fix does not involve replacing the hoses, but simply tightening the hose clamps. Top off if needed then road test the vehicle to make sure there are no leaks around the transmission cooler lines. I am not sure if it has came loose or if it may have a pinhole in it somewhere. Set includes: 1 supply line 5/16", 1 vapor line 3/8", and 2 unions. The repair on the transmission line will depend on where it is. Both oil and transmission lower cooler lines are prone to leaking. The transmission cooler relies on the engine's coolant system to function properly. After that, place a drip pan under the transmission. 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. This worked awesome, i put it on 2007 dodge durango, 4. Hi, first time poster here. Get the job done with the right part, at the right price. It will bolt right in and you don't have to worry about something extra breaking loose and leaking. Any reason it would be leaking from the vent tube?. I hope they last a long time. For materials, you will need transmission cooler hose that fits very snugly over the steel line (this is where a competent auto parts person helps, because if the lines slips off easily, IT WILL LEAK), a pair or two of fuel injection hose clamps to fit over those lines snugly (these differ from the heater hose clamps in that the bands are solid. It's leaking out of the quick connect where it's crimped to the hose. SEPTEMBER 2007 -- Ford is recalling 1,497 MY 2008 Explorer, Explorer Sport Track and Mercury Mountaineer sport utility vehicles equipped with the 4. Transmission oil cooler lines often leak due to corrosion. and are wet in the flexible hose/solid line connection areas. Re: Major Auto Transmission Fluid Leak Under Radiator Yes - all auto transmissions have a fluid cooler in or near the rad. Between each visit it stopped leaking for a couple of weeks. Teckpak known as Fitall manufacturer of transmission parts and tools, including detent cable, solenoids, clutch shims and transmission fixes for domestic and foreign cars. Transmission heat is the prime reason for tranny failure. Question = Oil cooler lines leaking at fittings. The frame is soaked with transmission fluid and this is a potential fire hazard if the fluid leaks onto the exhaust or catalytic converter. Fix your leaking transmission lines with these heavy duty, high flow, flexible transmission lines. Locate the area of the transmission line where fluid is leaking. Set includes: 1 supply line 5/16", 1 vapor line 3/8", and 2 unions. While transmission and sub-transmission lines account for only about 30% of the total losses. Description: DHD Allison Transmission Repair Line Kits Your ONLY guaranteed leak proof transmission line kit available in the aftermarket. My transmission cooler lines are leaking after a new radiator installation. Average repair cost is $190 at 23,550 miles. Ultra-Cool Transmission Oil Cooler by Four Seasons®. I ordered a new one (Gm tells me the feed and return line come together so I have to change both). Buy a 2007 Ford Explorer Sport Trac Auto Trans Oil Cooler Line Connector at discount prices. Find great deals on eBay for jeep wrangler transmission cooler lines. The 2 lines coming to the top of the radiator on the driver side are the trans cooler lines. Either clogs or leaks will make the oil cooler less effective at cooling the transmission fluid. The GM oil/transmission cooler lines are prone to leakage after a few years. For materials, you will need transmission cooler hose that fits very snugly over the steel line (this is where a competent auto parts person helps, because if the lines slips off easily, IT WILL LEAK), a pair or two of fuel injection hose clamps to fit over those lines snugly (these differ from the heater hose clamps in that the bands are solid. There is no real way to disassemble, fix, and reassemble. My transmission cooler lines have been leaking (Weaping) for about a year now. 97 Cadillac Catera Relay Diagram On Wiring Diagram. A physical inspection may be needed to learn there is a problem. Transmission cooler lines are corroded and leaking fluid all around the front passenger side wheel well. 6L Duramax Learn More View Details Deviant 75411 Transmission Cooler Repair Lines | 15-16 GM 6. The tranny is a newly rebuild 727 torqueflite. 38 for the hose clamps, get the #6 size (2nd smallest and comes in the 4 pack) - $2. 3L - Leaking Transmission Cooler Line I have a questions about Leaking Transmission Cooler Lines. I figured if i just cut the fittings off and used 3/8 fuel line, would i be ok. Yes, using something like Fluid Film is probably what I'll do after brushing off the rust/dirt from the metal transmission cooler lines. I’ve a Nissan Sentra 2007 and it is leaking transmission fluid and I’m unable to figure out from which part is it leaking from but the bottom pan is wet and a 3-4 cm puddle is being formed overnight. A very common problem on our cars. Kit Contents: Transmission Lines (6) 7/8"-14 O-ring to -10AN fittings (2) 5/8"-18 O-ring to -10AN fittings (LB7-LLY kit only). A friend dropped by tonight with the transmission cooler off his Dodge pickup. Transmision lines leaking at the radiator. *For minor leaks (a few drops in one area): This can be remedied quite easily. The dealer quoted me $750 to replace all three lines. Authentic ACDelco / GM oem transmission cooler lines and they were a perfect fit for my 2004 Chevrolet Malibu. i will take a look at it tomorrow morning. There just isn't room. TSB Seems To Fix 8-Speed Automatic GM Transmission. Find our best fitting transmission cooler line assemblies for your vehicle and enjoy free next day delivery or same day pickup at a store near you!. 98 Chevy 2500 leaking oil - diagnose oil leak(s) and replace oil cooler lines - After fixing the power steering leak, this truck was still leaving spots on the floor. Where can I get a new. A permanent solution to a growing problem. The truck seems to drive fine and I checked the transmission fluid level and it looks good. Lastly, a fix to an engine overheating condition could be required. yes I have seen this. All products are engineered and tested to provide years of trouble free operation. Hello everyone Hope all is well. Without these lines doing the job that they are intended for, it will be impossible to keep the transmission cooled down. Here is what a common kit will look like:. These are designed to repair or replace the factory 5/16" quick connectors found on AOD cooler lines where they attach at the radiator and transmission. 7 flex fuel. One of the oil lines are leaking, if you know which one that's have the battle. Cooler lines often run from the transmission to the radiator or external cooler. View Details; Jan 05, 2009 - Groveland, RI - Automatic Transmission. The 9C1 cooler setup uses 1/2" (-08) lines on the entire setup. Top off if needed then road test the vehicle to make sure there are no leaks around the transmission cooler lines. Any ideas? Just in case anyone is wondering how to disconnect the lines:. However, as a preliminary measure, you can fix this problem by tightening all the bolts surrounding the leakage area, and also tightening the tube nut. Iv'e been having a small leak from the tranny oil cooler at the front of the truck ('06 V6 xlt). Took it to a shop, they purchased the bent lines from GM, took a few hours on their part, cost me around $600. I also have the same leaking transmission cooler problem described by others in these posts. 2009 OBW Transmission Hoses Leaking I have a 2009 Outback with 56,000 miles. when i looked at the leak it was not a small leak it was like blood squirting out of a. Will normal hoses / barbed fittings W/screw clamps hold these lines without leaking. There just isn't room. and i looked under the car an well its leaking. Locate the source of your leak with our handy guide. the lines attach to the radiator with fittings make sure the new lines have the o rings on them no need to use Teflon tape as the threads do not seal only the o ring does. A transmission's fluid lines can also be damaged by debris in the road. 1983-1995 Mustang Cooler Line Connector Repair your Mustang's leaking transmission cooler lines with the following connectors and repair kits. My 2001 F250's tranny is leaking from what appears to be inside the tranny's bell housing. The best way to prevent these high transmission repair costs, and avoid having to add transmission fluid every few days to your vehicle is to use BlueDevil Transmission Sealer. Maki, Editor. 3 IDI Motors), 7. Took it to a shop, they purchased the bent lines from GM, took a few hours on their part, cost me around $600. Identifying Your Cooler Line Welcome to the world of transmission and engine oil cooler lines. The picture is, of course, of the upper connection. The transmission is a high pressure unit. How do I go about this. Where the two lines enter the transmission they are connected together with a bolt holding them in. this is a permanent fix for the leaking transmission cooler lines on the gm light duty pickups equipped with the duramax, or 8. I did put some teflon tape on the ends of the fittings. Transmission cooler lines leaking at the radiator puts car owners in a distressing situation. They wanted almost $500 to fix this problem for me. Fits Tacoma Trans Oil Cooler Line - Repair or Replace If your 2007 Toyota Tacoma is leaking transmission fluid—typically a reddish fluid that becomes darker as it ages—you may have a leaking transmission cooler line. Transmission cooler line leak, fix or replace? Ignore the leaking power steering fluid, this picture was taken before i replaced the lines and reservoir. The Best selection of Automotive Performance parts shop for diesel vehicles. The line connections can also leak if they are loose or the metal washer is damaged or missing. Transmission Cooler Leak. If necessary, place newspaper under the lines and start the car. This could occur if your transmission fluid is old and dirty or if you have clogged cooler lines. and they verified the crimps were seeping on the rubber lines of the. If the modulator is not plugged into. Putting a flare on the end of the lines will surely help the seal, but not 100% needed. I have a very slow leak which is apparently transmission fluid. I also have the same leaking transmission cooler problem described by others in these posts. Transmission Cooler Line Repair Kit (10206) by Merchant Automotive®. Each transmission cooler has two lines: the inlet that takes the coolant to the transmission and the outlet that takes the fluid back to the cooler. If checking cooler flow make sure transmission is at operating temperatures. Description: DHD Allison Transmission Repair Line Kits Your ONLY guaranteed leak proof transmission line kit available in the aftermarket. The GM oil/transmission cooler lines are prone to leakage after a few years. shows how the lines are attached to the front transmission cooler, which is located in front of the engine radiator. *For minor leaks (a few drops in one area): This can be remedied quite easily. I don't know if it is possible to just replace the section that is corroded/leaking but it was fairly easy to cut the line with a pipe cutter. I had both replaced almost 2 years ago and it cost me $400 at the dealer (I think I might have over paid a bit). Automatic Transmission Oil Cooler. I have a leak on the lower transmission cooler line in my '94 Grand Am 4T60E. I would just cut out the leaky section and replace it with new tubing connected by tubing unions. The Dorman 624-332 Transmission Oil Cooler Line for your 1994-2002 Dodge 5. How much pressure is actually on these lines when the engine is running. When your 4T65E is leaking from the transmission cooler lines its a simple and easy fix. You can also, with a light, get a better look at the connections at the trans cooler (top portion of the radiator). Just learned that the trans cooler lines on my 08 2500HD(6. Those must be thick metal lines because it was worn pretty good in one spot but not leaking yet. I know its not serious now but I would like to fix it before it gets serious. my classic is leaking tranny fluid from the side cover. 6L Duramax Learn More View Details Deviant 75411 Transmission Cooler Repair Lines | 15-16 GM 6. Just be sure you are getting trans cooler hose and not fuel line or other multi purpose hose. Locate the area of the transmission line where fluid is leaking. I just replace all three tranny lines on my 2004 GMC Sierra, Bought them from Chevy dealer, word of advice, if you have a line siezed into the tranny cooler,cut the siezed line, remove trans cooler from vehicle and heat the siezed up union to remove, tran cooler is very fragile an will cost $100 to replace, believe me I know. The red arrow points to the transmission cooler. I just bought a new radiator to put in my 97 f150 4. I started getting transmission fluid drips this weekend. As a hobby, this year I started doing a lot of my own auto repairs, so I was thinking of replacing the lines myself. This is actually a common issue with this series of Escalade. Sometimes transmission coolers are part of the same assembly as the radiator or somehow linked to the engine's cooling system. I have gone through TWO (2) radiators for this problem, thinking that it was the internal threads themselves that were leaking. Please select your proper model year designation, as well as if you currently have an aftermarket radiator. Transmission cooler lines leaking at the radiator puts car owners in a distressing situation. Where should I mount a transmission cooler? Answer: Monster Transmission highly recommends mounting your external transmission oil cooler in front of the radiator. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35. when i looked at the leak it was not a small leak it was like blood squirting out of a. Its the place where two lines are right next to each other. I've just discovered leaks at multiple fittings along the transmission cooler lines. I have an F-150, 2003, 4WD with an auto. I would like to fix it myself and not take it to a shop. of transmission fluid per week to keep the transmission from slipping so much when going from a stopped position. The line connections can also leak if they are loose or the metal washer is damaged or missing. You could just add a section of rubber hose to fix the spot. I did both, cut the hose off and used transmission cooler line + clamps to fix it and then replaced it once the new lines arrived. Find Automatic Transmission Cooler Lines and get Free Shipping on Orders Over $99 at Summit Racing!. With the rear part of the lines disconnected, now move to the front of the car. Very simple job. Ford 4R7xx Transmission Cooler Lines; Figure 3. Description: DHD Allison Transmission Repair Line Kits Your ONLY guaranteed leak proof transmission line kit available in the aftermarket. Additionally, if you are still driving around with your original Mustang transmission cooler lines, there is a chance that the metal material might have rusted out. The other 3 lines came off easily. In the front, one of the hoses at the cooler was leaking. Each line has a section of rubber pressure hose built in to limit vibration fatigue and/or ease installation. Average repair cost is $190 at 23,550 miles. Buy online, pick up in-store in 30 minutes. The dealer quoted me $750 to replace all three lines. If the modulator is not plugged into. So they told me I need to fix this: Solenoid pack Trans pan is leaking Trans cooler is leaking Evap leaks One missing wheel stud front wheel. The repair on the transmission line will depend on where it is. 5 Common Causes of Transmission Fluid Leaks; How to Fix a Transmission Fluid Leak; Average Leak Repair Cost. Operating your vehicle with impaired Ford Mustang transmission cooler lines could severely impact your transmission, and may lead to some extensive repairs in the not-too-distant. Can I drive with a transmission oil cooler line problem? Driving with a leaking or broken oil cooler line is not recommended as the amount of transmission fluid that is lost cannot be calculated while driving, and the cooler, and cooler lines for the transmission are able to leak a great amount of transmission fluid very quickly. Where can I get a new. Fix your leaking transmission lines with these heavy duty, high flow, flexible transmission lines. I think it's coming from where the fluid line goes into the fitting, and not from where the fitting goes into the cooler. Furthermore, heat can cause cracks in the lines creating a leak as well. Has anyone done transmission cooler lines on a 2007 chevy silverado 1500 classic? I purchased new lines they go to radiatorfrom transmission. You will need to replace the hose that is leaking. Leaking transmission pan seal, and leaking transmission cooler lines 64000 mi US $3000 Dealer diagnostic fee on failed transmission bearings in transmission failed less than 1 month after warranty ended. After pulling the belly pan and inspecting the transmission hoses. A permanent solution to a growing problem. My car is 12 years old so hopefully these new lines will last the rest of the useful life of my car. This is a simple and inexpensive upgrade that will only do good for your Jeep Cherokee. Backed by over 50 years of car parts experience, fix it once and fix it right with Four Seasons. The best way to prevent these high transmission repair costs, and avoid having to add transmission fluid every few days to your vehicle is to use BlueDevil Transmission Sealer. It is designed for rear wheel drive vehicles and is usually paired with the smaller V8 engines. A very common problem on our cars. The Best selection of Automotive Performance parts shop for diesel vehicles. If you will remove the air cleaner box, you will see where they enter/exit the trans. 6L with an auto. Look at where the lines connect to the radiator and see if there is signs of the leak. While replacing those look at the oil filter adapter thats probably leaking as well. Hello everyone Hope all is well. The 2012 Chevrolet Cruze has 7 problems reported for transmission leaking fluid. I believe the transmission line is on the passenger sides and the oil cooler line is on the drivers side. MW: Replacement of the hose assemblies is required. ) dealership says I can't just buy the rubber part of the line at the front. 6L engine and 6R transmission. Mike Allen hit the nail on the head. As these trucks are getting a few years older, the transmission cooler lines can start to develop leaks. The Merchant Automotive 10206 Transmission Cooler Line Repair Kit for your 01-05 GM 6. I've somehow managed to strip the thread on the transmission cooler line port on the right hand side Yay! What happened - I was filling up the trans, turned the car on and after a while realised most of the fluid was on the floor!. *For major leaks (more than a few drops in one area): You may try a bottle of stop-leak, but inevitably you will need to take your transmission in for service at a dealership or transmission repair/service center. look near and under the car radiator area for these lines. Your Liberty should be running when you check your transmission fluid level, otherwise the fluid level on the dipstick will not be accurate. The repair on the transmission line will depend on where it is. Transmission fluid works best at lower temperatures. I would just cut out the leaky section and replace it with new tubing connected by tubing unions. You probably should change the ATF, filter, and pan gasket when you replace the ATF cooler lines if you haven't changed the ATF in the last 30,000. and i looked under the car an well its leaking. The bumper wore a hole through it. 5 Common Causes of Transmission Fluid Leaks; How to Fix a Transmission Fluid Leak; Average Leak Repair Cost. I can get the lines at the parts store for about $45. Similar to a transmission fluid cooler, the oil cooler is actually placed inside the radiator, with metal/rubber lines that carry the pressurized engine oil to and from the oil filter. The connection is leaking red fluid which makes since on the transmission fluid. transmission. Many times engine oil or other oils can blow back on the transmission making it appear that the transmission is leaking. If there is any burned residue in the lines or coolers , poor circulation will cause transmission overheating and failure. 6L Duramax LB7 and LLY. Transmission Cooler Lines has rubbed and smoothed out the bottom of the line to the point where it's leaking. Older cars have the tanks on the top and bottom. Its under the engine on top of the crossmember. on the engine side the lines snap into couplers i would replace these couplers as then tend to leak. Ford 6R80 Transmission Cooler. I TOOK IT TO THE DEALER AND INSTEAD OF THEM REPLACING THE LINES, THEY TOLD ME THAT I NEEDED A NEW TRANSMISSION AND LINES AND IT WOULD COST ME $6200 TO FIX IT. The line looks kinda rusty, so I figure it's burst a small hole on its underside. Also trans cooler lines may need O rings. Operating your vehicle with impaired Ford Mustang transmission cooler lines could severely impact your transmission, and may lead to some extensive repairs in the not-too-distant. The leak is coming from the rubber high pressure line at the crimp. 62000 mi LH front axle assembly replacement. One problem that can happen with the transmission is that it might start leaking fluid, and this can occur in a few spots, but for transmission fluid cooler it will most likely happen at the radiator. | PlowSite. when i looked at the leak it was not a small leak it was like blood squirting out of a. Anyway, I've gone round and round trying to find the part. Fleece Performance FPE-Allison Transmission Cooler Lines. How do I fix a transmission line leaking at the radiator connection on a 1997 Astro AWD? If it is a manual transmission you do not have transmission cooler lines. Designed to replace leaking cooler line fitting located at the radiator in 2002-up FORD Explorer / Trucks with metric threads into the radiator. If I don't use fluid film I may just use the remaining Dupli-Color Rust Fix I used when patching a rust hole on this car a while back. I did both, cut the hose off and used transmission cooler line + clamps to fix it and then replaced it once the new lines arrived. Check the cooler fin area for leaking or signs of engine coolant. (I was a Amsoil dealer for a few years) Amsoil 'reccomends' it but its not approved. The Merchant Automotive 10206 Transmission Cooler Line Repair Kit for your 01-05 GM 6. Where the two lines enter the transmission they are connected together with a bolt holding them in. 07 Yukon Denali xl -Dealer claims transmission cooler lines are leaking and has to be replaced at the tune of $749 with tax - seems awfully high- anyone have an idea on the correct range for replacement ?. Most modern radiators have end tanks. This worked awesome, i put it on 2007 dodge durango, 4. Alternatively, drain. A transmission's fluid lines can also be damaged by debris in the road. 00 on average. and my d/s axle has excessive play were it goes into the tranny. Average repair cost is $270 at 81,100 miles. The dealer quoted me $750 to replace all three lines. Locate the area of the transmission line where fluid is leaking. This is actually a good thing because I wanted to separate the two after reading some stories about the transmission cooler leaking fluid into the cooling system and causing big problems. I have the same issue many have had. com offers the lowest prices for genuine 2004 Jeep Grand Cherokee parts. It probably took 10-15 minutes to pull the lines off and replace the fittings. I have to fix very soon and I hoping it gonna be okey as soon as possible. Those engine cooler lines always leak. Sonnax cooler line repair kit 22000-01K features adapters that seal on the leading edge, preventing fluid from reaching the fitting threads and crack. Top off if needed then road test the vehicle to make sure there are no leaks around the transmission cooler lines. How To Fix An Oil Leak Replacing Oil Cooler Lines In A 1999 Gmc Jimmy. Mini Cooper Manual Transmission Fluid Leak Read/Download future gm cars with dsg transmission, pontiac fiero transmission fluid capacity, transmission cooler 2006 tundra leaking, 2001 thomas transmission brake, cat5 manual transmission dimensions, gm ford transmission mount adapter, s-10 transmission oil in honda cr250, review mini cooper. Transmission fluid is usually pink in color. If the modulator is not plugged into. I'ts accessed from under car so I suggest car ramps on front wheels, and there will be liquid spillage so make sure you work on car with cold engine and use eye wear protection. Has anyone done transmission cooler lines on a 2007 chevy silverado 1500 classic? I purchased new lines they go to radiatorfrom transmission. Its under the engine on top of the crossmember. This worked awesome, i put it on 2007 dodge durango, 4. Average Transmission Leak Cost Based on Make and Year. the trany will need to be flushed as it will be a big sloppy milkshake of oil and coolant. The cooler lines are on the passenger side of the transmission on most vehicles; both lines are made of brass. Just learned that the trans cooler lines on my 08 2500HD(6. I was under my truck this weekend to fix a power steering line leak and noticed the transmission cooler line was wet, its not dripping fluid or anything its just wet and its definitely coming from that line. These lines are intended to work only with factory motor, transmission, and radiator combinations. Went thru this about 3 months ago with the dealer, not covered 37,000 miles. My truck started doing this at 120K miles on one of the three lines. A simple repair process to stop the leak for the cost of around ten dollars. I just bought a new radiator to put in my 97 f150 4. With franchises conveniently located coast-to-coast, Mister Transmission is the largest chain of transmission and driveline repair specialists in Canada. Maki, Editor. The very next day one of the transmissions lines started to leak. Trying to cool down and fix the transmission system is not an easy job if you don't have a complete fuel/oil cooler line repair kit. If I don't use fluid film I may just use the remaining Dupli-Color Rust Fix I used when patching a rust hole on this car a while back. Maki, Editor. When it comes to your Ford F-150, you want parts and products from only trusted brands. Just be sure you are getting trans cooler hose and not fuel line or other multi purpose hose. After 30 seconds, turn the car off and look for leak traces of red transmission fluid on the paper and the steel lines. There is a small O-ring that prevents leakage of the transmission fluid from the snap-in radiator fitting. but i agree either cooler lines, tranny pan, or side cover. Parts had to be ordered. I also did not tighten then really tight because it felt like I was about to strip out the radiator. I'm really wanting to do something about it besides replacing them with stock replacements. Transmission fluid runs through a line made of aluminum or steel. The rear of the intake manifold seems dry too (as best I can tell). Should be compression fittings, make sure they are tight. It was a temporary fix to slow the leak till I do a permanent fix. Is there some sort of putty or patch that is designed for leaking tranny cooler lines?. It probably took 10-15 minutes to pull the lines off and replace the fittings. Examples might be, the front pump seal, the cooler lines, side covers and sensors. Any parts needed for your 4T65E you can find in www. 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. Those engine cooler lines always leak. I hope they last a long time. I checked the trans cooler and noticed fluid all over it. Top off if needed then road test the vehicle to make sure there are no leaks around the transmission cooler lines. I just replace all three tranny lines on my 2004 GMC Sierra, Bought them from Chevy dealer, word of advice, if you have a line siezed into the tranny cooler,cut the siezed line, remove trans cooler from vehicle and heat the siezed up union to remove, tran cooler is very fragile an will cost $100 to replace, believe me I know. Mechanic has seen same problem on Dodge minvans on other occurrences. Lines connected between the transmission and transmission cooler portion of the radiator convey hot fluid from the transmission to the cooler, where the heat is transferred to the engine coolant, and back to the transmission. I had a transmission cooler line leaking. Sometimes, the transmission cooler may fail and the line replacement comes as a part. Sometimes transmission coolers are part of the same assembly as the radiator or somehow linked to the engine's cooling system. The cooler lines are on the passenger side of the transmission on most vehicles; both lines are made of brass. This worked awesome, i put it on 2007 dodge durango, 4. Find great deals on eBay for jeep transmission cooler lines. The oil cooler line fix sticky in the 4. A significant loss of transmission fluid can often be noticed while you are driving, and can happen when a sharp object on the road punctures the transmission pan or cooler lines. I need to fix my wife's Commander's leaking transmissions cooler lines. If the leak is at a coupling then the joint may be able to be tightened. The way the car is designed, the first and last foot of the tranny cooler line is rubber, the rest in between is steel.