Reason being, the radiator can act as a heater and warm the transmission fluid higher than where you may be comfortable with it operating (200 + degrees), especially if you face a lot of stop and go traffic or other harsh driving conditions. Small hard tubes at the radiator And To The Trans end, and flex hose the rest of the length. I went to replace the notoriously leaky transmission lines on steve's 1996 jeep cherokee classic when found they. You can find transmission mounting kits here. This also worked wellâ¦ for a while. Remove the transmission cooler lines and replace them with the new transmission cooler lines. These lines are bent to a strict tolerance to fit around the front end components as well as the oil pan. Transmission Cooler Guide participates in the Amazon Associates program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. They typically resemble brake lines and are made of metal. 1/2" transmission line can be obtained from napa. Do that for the cooler and the heat exchanger. Where ever your cooler is mounted, it needs to get enough air flow to help keep the fluid cool. 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. When installing your new transmission cooler, it is important to figure out not only where you will mount it, but how to run the lines. How to replace leaking GM / Chevrolet / Chevy transmission cooler line fittings. In most applications where the external trans cooler is used in addition to the factory one, you will need to route the new transmission lines from the radiator to the external cooler. Pull the line out of the transmission fitting, taking care not to bend the line. Limited â¦ $107.99 $ 107. Metal transmission cooler lines are typically pre-bent with fittings that are held on by a flare at each end of the line. For a small investment, you can save thousands in repairs needed for replacing a failed transmission due to over heating. When installing a transmission cooler in your car, truck or SUV, it is important to consider not only the cooler size, but where to mount it, and how to run the lines. Attach the new cooler lines to the radiator and the transmission as well as any hangers that they may have been â¦ Dorman 624-284 Automatic Transmission Oil Cooler Hose Assembly for Select Chrysler/Dodge/Ram Models . While installing basic rubber lines might work for most, in some cases, your vehicle may need custom lines, which are more costly than standard transmission lines. Then, you can purchase stainless steel, 3/8 brake line and braided stainless transmission cooler hose with fittings from a place like Jegs and make up an awesome set. It can be up to 5 feet in length, but it depends on the type of car. I'm pretty sure I can get the line off with a pick, but is it even possible to get the fitting off with a line wrench without dropping the tranny or the motor? More often than not, most vehicles can utilize a transmission cooler to help prolong the life of their transmission. Thank you like and subscribe ! If this is the case, it is highly recommended to perform a full coolant flush to ensure no ATF got into the cars cooling system. These heavy-duty, high-flow, flexible transmission lines are just what you need for trouble-free performance from your Allison Transmission. In some applications however, it may be best to have a remote mounted transmission cooler that utilizes a fan to help cool the fluid. It kills me that a $10 part will cost hundreds to replace. 5.0 out of 5 stars 1. How do you fix a leaky transmission cooler line? A new transmission oil cooler line. So, for this job my mechanic got a set of the aluminium pipes that the BA Falcon uses. Ultimately, the cost to install an automatic transmission oil cooler is dependent on what your needs are. It will be easier to install if you can remember how they were run before. While some may argue that you need to install a certain type of cooler inverted to prevent air bubbles, the transmission line pressure it strong enough to push fluid through the entire cooler to prevent this. 99. In most cases youâll need to make a cut to the factory line and connect the new rubber line to it. Get it as soon as Fri, Jan 8. You want the already warm fluid to flow into the external cooler to help better control fluid temperatures, so the transmission cooler flow direction will look something like this: Transmission out (fluid hot) > radiator cooler in > radiator cooler out > external transmission cooler in > transmission cooler out > transmission in (fluid cool). TRANSMISSION COOLER LINE REPAIR KIT Item #: KCR100 $29.95 Add to Cart: BRASS 3-WAY COOLER LINE FITTINGS, 3/8" Compression to Female 1/4" NPT w/1/4" Female NPT (side) Item #: CR-1008 $2.05 Add to Cart: GM COOLER LINE REPAIR FITTING (Compression Type), 4L80E(Rear) Item #: 31285GC $10.95 Add to Cart : COOLER LINE REPAIR FITTING (Compression Type-Rear), GM â¦ This keep your transmission in a safe operating range which in turn will allow your transmission to last longer. $9.83 $ 9. $107.99 $ 107. HOW-TO replace transmission cooler lines (2007 G6 3.5L Auto) Jump to Latest Follow 1 - 9 of 9 Posts ... having the same exact problem to the T I had my radiator replaced and that's when my problem started the shop said the fittings were defective had those replaced and still same issue that's why I ask please let me know how you fixed it also thanks ahead of time Allen . 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