I still have to receive his estimate but I want to get a rough idea of how much the cost to get it repaired. If the leaking fitting is a standard Jiffy-Tite removeable fitting you can replace just the fitting. $300 out the door. This little fitting was all it took to fix my leaky transmission cooler line on my 2008 Chevrolet Impala. I just took a look at my 2007 GC and see your problem. Seeking advice on Transmission Cooler line leak. Mine was leaking on rubber hose part of topmost line, where it jumps at radiator cooler bottom to engine crossmember. Is this fitting replaceable? In that case, it wouldn’t be the cooler lines that are replaced but the connection fittings. There's a little hole in the the crimp fitting and it's leaking from the hole. The minivan is leaking some transmission fluid and the repair guy said there's some leak in the cooler line fittings. Get it as soon as Fri, Jan 8. I looked at the fitting location and it looks to be almost impossible to get to from under the vehicle. The transmission line was done in less than ten minutes and the oil cooler line was slightly more difficult because its neatly packed next to the block under the power steering pump, took one hour. More Buying Choices $3.14 (15 new offers) A few ounces of transmission fluid seeped out from the radiator through the unused lower opening for the transmission cooler line’s compression fitting, causing me to panic. Something like this Derale Transmission Line Compression Fitting Kit - 3/8" Line to 3/8" NPT Barb Derale Accessories and Parts D13032 Is there something better? Automatic Transmission Oil Cooler Line Connector (800-707) by Dorman®. Part numbers used: I have just developed a leak on the upper outlet fitting for the tranny cooler lines on my 4l60e. I'm all ears. These fittings are 1/4-inch pipe thread, and CAN include an adapter from the factory for threaded steel lines in an SAE size." I just changed the lines, installed a deep pan with temp probe and extended filter, installed a pump rub kit and flushed the system. > > that has developed a leak around the upper oil cooler line fitting > > where it enters the radiator on the driver's side. On method, I cut off crimps with die grinder, measured barbed end of metal tube which was 9.2mm. It is in a very tigh spot so it is hard to see it very well. Does anyone know what size the OEM rubber transmission hose's are, will save me climbing back under the truck tonight. I've had a leak going for a while on the transmission cooler line and have been putting off fixing it. Both had new internal and external o-rings, and new C- clips. If the leak is between the line and the quick connect fitting then I suspect you have an issue with the fitting. Replaced the tranny cooler lines and now have a tiny drip drip leak when i drive it. The Dorman 624-896 Transmission Oil Cooler Line for your 2003-2005 GM 6.6L Duramax takes you a long way in protecting your transmission. 1 month later I noticed the leak at the front right corner. 4. I originally thought the leak was coming from one of the fittings on the right side of the picture, but after cleaning it off it looks like it's coming from one of the fittings toward the radiator. Auto Trans Oil Cooler Line Fitting Leak. Is it just a regular old o-ring, or something else? We have a leak coming from the top trans cooler line on the 96 Mercury Grand Marquis LS and we was wondering if we should use a certain sealer or not on the fittings going into the radiator? The lower radiator hose is in the way to take a picture or do much of anything else with. 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. Both of the transmission line fittings were perfect. Got all the trans cooler lines replaced, all new fittings, fluid change, filter change, and new pan gasket. If so what is the size of the threads and if anyone knows where to find one. Equipment automatic transmission Oil cooler 400 psi 5/16 hose - which is 8mm.. Some sort of o-ring that would seal the connection on the upper connection with barbs the. Trans cooler lines replaced, all new fittings, fluid change, filter change, filter change, filter,! Leaking fitting is a 10mm socket wrench, and new pan gasket idea of how much is best... Line 's leak-resistant design prevents the common, high-stakes problem of transmission fluid screwed them in some transmission screwed. Off the clip and pull the line and have been putting off fixing it hard to see very! 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