If you're going to use the OEM style bottom-of-the-radiator trans cooler, you might want to get 72" lines and cut them down and. Find Transmission Line Adapter Fittings 4L60E Transmission Model and get Free Shipping on Orders Over $109 at Summit Racing!4L65E / 700R4 / 4L60 / 4L60E Cooler Line Fitting, 5/16" x 1/4" (82-Up) A Brand 4L65E, 700-R4, 4L60, 4L60E cooler line filling. COOLER RETURN LINE CHART CHRYSLER. This type of fitting is designed to create a secure connection between two components while still allowing for easy removal and re-use, if necessary. Male straight pipe to male -6AN fitting. NPSM or 1/4 in. 8 out of 5 stars 6 These fittings are threaded into the cooler ports in your transmission and enable you to run AN lines to a transmission cooler Compatible with: TH400, TH350, 700R4, 4L60E, & 200-4R transmissions (4L80E see other listing, compatible with 1 additional long fitting) The Grumpy Grease Monkey mechanical engineer. . About this item 【Product Detail】-8 x 1/4 NPS is the correct thread size for most of the GM 4L60E transmissions. Based around the 4L80E (and fitting wherever a 4L80E will fit), the 6X is a true six-speed transmission that TCI rates at 850-plus horsepower. Note: This info assumes you can swap or remove cooler line fittings, electronics modules, tailshaft housings, and shifter brackets yourself. Flared line case fitting #M462C. D; Each 3/8" inner diameter hose is about 70" long with AN-6 inverted flare. the 1/4 NPT doesn't thread in, gets stuck after 1/4-1/2 turn. Street performance & off-road parts. Dorman 800-614 Transmission Line Connector - Tube Size 3/8 - Thread 9/16-18UNF Compatible with Select Models, Black. The bottom of the trans pan says in BIG letters "METRIC". Automatic Transmission Accessory Parts. JJLT1. Monster Transmission provides transmission parts for all transmission year, make, and models. Transmission Cooler Line, Steel, Rubber, Cadillac, Chevy, Each. 4L60E Cooler Line Pressure. Usually, when installing a transmission cooler, you will require an internal diameter of 11/32 inch. 99End 1 Type: 9/16-18 UNFEnd 2 Type: Male Inverted FlareMaterial: Aluminum. I replaced my radiator and all the oil and transmission hoses connected to it. This fitting has been designed specifically for use. What Size are 4L60E Transmission Cooler Lines? The 4L60E transmission cooler lines are typically 3/8 inch in diameter. A Brand New 4L65E, 700-R4, 4L60, 4L60E cooler line filling. I will probably need the Transmission Cooler Fittings as well. Add to cart. Sierra 1500-2500 (2500 with 6 bolt axle pattern) Sonoma. 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. 55 Max PSI: 750 Min bend radius: 2. Size: 6AN Flare to 1/4" NPSM; Material-Aluminum alloy, reusable and recyclable. Line Going to the Transmission Case: Lineartronic CVT Lower line: TOYOTA: Transmission: Location. Cooler Line-Transmission-Stainless Steel-2 Piece Diesel : 4 Wheel Drive 3/4 Ton 88-94: 1: $79. This can make a big difference in keeping a transmission cool and lubricating vital transmission components. 99. Coooler Line Connector Fitting: 2: 1/4-18: 38 N-m. 6L Diesel Engine (VINs D, 2,. with the main difference between the two transmissions are their size, torque capacity, gearing, and how they’re both. Estimated Ship Date: TomorrowCome out of the radiator cooler and around to the "input" line of the external transmission cooler. 4L60E Transmission in a buggy. 5. Brass) Case Fitting 5L40: Bottom 6L45, 6L50, 6L80, 6L90 Bottom:. Part Number: SUM-230321 4. Transmission Line Connector - Tube Size 1/2 - Thread 9/16-18 UNF. Slow, slipping or no reverse: “lo-reverse” clutches are worn out, fluid leak in the reverse apply circuit, or broken sunshell. 8 out of 5 stars Guest Discussion starter. Find Parts and Accessories 4l60e transmission lines KEYWORD and get Free Shipping on Orders Over $109 at Summit Racing!. RJSPHH . We also took time to assess a wide variety of options including durability, materials, designs, expert reviews & customer ratings to find the best-performing 4l60e trans lines . The filters we recommend for your 4l60e are: GM 24208576 (Factory deep pan) GM Genuine Parts 24208576 Automatic Transmission Fluid Filter Kit with Gasket and Seal. 0L/4. I'm installing an aftermarket cooler this weekend along with the usual stainless braided lines & AN fittings, and a transmission temperature gauge. 1. Vandura. Monster Transmission provides transmission parts for all transmission year, make, and models. 25" Number of plates: 13; Fitting size: 3/8" inverted flare. Performance Parts. 3L 5. One end threads into the transmission case & the other end has a 5/16" compression fitting. 1/2” Compression Fittings - Transmission Cooler Note: Routing Hoses Warning: Important: This kit includes fitting options to attach the cooler to the transmission cooler lines. It's usually 3/8" OD. R&R = Remove & Repair (or Rebuild) = Transmission must be removed to fix the problem and may have to be rebuilt or replaced. About this item . I'll keep everyone updated w/pics as my install progress continues. 12538 posts · Joined 2008. NPS Male Threads, -6 AN Male AN, 4L60E, AOD, C5, TH350, TH400, Each. We loosened and set aside the headlamp housings to allow for easier. fuel pump fittings adapters. Part of the conversion is to remove the factory heat exchanger that bolts to the side of the tranny and uses floating inserts sealed with O rings. Read More. 2 4. cgates said: Are the 4L60E transmission cooler lines the same as for the 700R. 700R4 Fittings GM transmission 1/4" str. 4 inches and weighs 236 pounds. 6AN 70" Transmission Cooler Hose Kit Lines Fitting Kit for GM Chevy 1996-2021 4L80E, for Ford C4-C6-AOD, for Turbo 350/400/200-200R4/700R4 4L60 4L60E 4L65E,Stainless Steel Braided Lines. These are your transmission fluid/oil/coolant lines. I think they're 1/2" nps. #11 · Sep 25, 2016. or Best Offer. Unfortunately, 10mm metric tubing nuts and unions are not readily available. Quick view Add to Cart The. GM COOLER LINE FITTING, 4T60E, 4L60E, 4L80E(Front) Item #: 31284 $6. Part. Fits GM 4L60E 4L65E Transmission Cooler Lines Fitting Set 6AN Fiber & SS Braided. Email Required. 173 posts · Joined 2012. What size are transmission cooler line fittings? Transmission Radiator end of fitting has 1/4″ MPT. Free Same Day Store Pickup. Manufactured to GM OE specifications for fit, form and function. . Find Parts and Accessories 4l60e cooler line fittings KEYWORD and get Free Shipping on Orders Over $99 at Summit Racing!2. Derale 14204, 700R4 / 4L60E, Transmission Pan Cooler $ 259. NPS. This job isn't the e. I am trying to buy lines for my 55 Nomad and find 700R lines but not the 4L60E listed. What you need to know about GM Chevy transmission cooler line removal. Black Fittings & Line Kits. Please measure your factory ones to be sure these will fit. 0L models with 140 amp. No, we will have the line and the fittings sold separately, you can order these by the length and fitting size you need. line fitting is 1/2″-20 inverted flare INS. The sender is the same size as the plug so that was easy. I plumbed my cooler lines and took out the compression fitting adapter and used a 1/4NPT to -6AN fitting. When choosing hoses for transmission cooler applications, it is important to take into account the size of each hose's inner diameter. Derale 15300 tube and fin cooler. If so, the seal will be tapered to fit the fitting and will be harder so it won't extrude into the tube. So if you replace your radiator with a spectra this fittings will fit on the Transmission cooler lines (passenger side). The fluid exchange does not remove 100% of the fluid but does a very close job. Our replacement lines are engineered from factory original lines and CNC manufactured for precision. Sep 30, 2015. Sponsored. Had to flip existing transmission cooler bracket. THE LS3 CHEVELLE PROJECTS GETS CUSTOM TRANS COOLING LINES FOR THE 4L80E USING -6AN PUSH LOCK FITTINGStoolslines are made of rubber or plastic and connect to the radiator via fittings. 99 pr. Package Width. Quick Connector Clips; 4 Each-3/8 Inch, 1/2 Inch, And 5/8 Inch Steel Clips; This transmission oil cooler line clip is a direct replacement for an original equipment clip that is corroded or has become damaged or lost during service. Free shipping on $109 orders. Cross threaded trans cooler line fitting. Sponsored. The estimate for the lines was 150 (plus labor, fluid etc). $8. T350, T400, 700R4 and most 4L60E, 4L85E Transmission Cooler Line Fittings . We found the cooler made a significant difference in terms of cooling and preventing heat soak. 【Package Includes】-2 Short Transmission Cooler Fittings Sent from my GT-I9100 using Tapatalk. 05. Most 4l80e transmission filters and kits (including pan gasket and filter seal) cost around $20 – $30. Rich. Complete the job with these highly suggested add-on products. This warning applies to stainless steels as well. Maybe barb fittings to hose for the trans. I'll have to dig around for the links here on the forum. $45. 00 + Sold in packs of 1 x 1: $4. Start a package delivery business. The rear cooler line is a special fitting and must be used. Flared and used the original fittings at the transmission end, and made a bubble flare at the radiator end. Eva. $11. Transmission cooler lines are generally available in sizes ranging from 3/8 inch to 5/8 inch. shiftritetransmissions. clients. These plate and fin, and stacked plate B&M. I am teed into the top cooler line near the radiator. JEGS 113600K. In a truck it goes from line 4 to rad then to external cooler then returns to trans via line 5. com: Transmission Cooler Hose Line Fits for GM Chevy 1996 and Newer 4L80E Transmission Stainless Steel Braided Lines Fits for Ford C4. I have a friend that is putting a 1995 B-body LT1 and 4L60E tranny into a 1931 Model A street rod. 200, 200-4R, 700-R4, 4L60E, 4L65E, 4L80E (1991 - 1996)* They fit any transmission port that is 1/4" NSPT and will convert to a -6AN male fitting. Another Wrangler direct fit transmission cooler option for the JK owners is the B&M 70291. Earl's 940006 - Transmission Fluid Cooler Fittings -06 AN Male (2)How To Install Trans Cooler Onto A 2008 4l60E. Competitors Price $2. 1. I'm installing an aftermarket cooler this weekend along with the usual stainless braided lines & AN fittings, and a transmission temperature gauge. system is the #1 cause of transmission failure after a replacement. Thanks Reply Like. The threaded portion looks to be about 1/2” in diameter, but a 1/2” wrench will not fit over the threads. $7. . 2 out of 5 stars 141 【Product Detail】-8 x 1/4 NPS is the correct thread size for most of the GM 4L60E transmissions. I ended up remaking the auto lines from front to back with new fittings. Tru Cool 40k – Best Transmission Cooler For Towing & Trucks. PART# 624-100A and 624-101A ($15 each) They snap in, and hug the trans and the LS block. 2. The upper port on the trans was very difficult to access because of its proximity to the trans tunnel, headers, and TV cable. These fittings are made from a high-quality steel with an O-ring seal for reliable performance. Ideal for converting stock transmission cooler lines to braided lines using aircraft / an fittings; Includes two fittings and two crush washers;. This tells you through which the upper radiator port and the external transmission cooler are connected. Review Subject Required. B&M 70274 Specs. 4L60e transmission cooler fitting for fluid exchange. Between the size of the cooler and the need for aftermarket fittings, this cooler can get the job done in street applications, but has the ability to have a large cooling fan mounted to it easily. 28 lb-ft. 25. 1lbs. Both vehicles had a 4l60e and this transmission cooler was easy to install and worked great. 34. Automatic Transmission Cooler Line Kit; GM Powerglide;. Transmission Cooler Hose Line with Fitting kit. 4L65 Trans. Maybe barb fittings to hose for the trans. So Thinking about getting AN 10 female to barb hose fittings for it. SCTT8804 SCTT8845 1988-1994 / / / / 4L60E Transmission Cooler Lines Stainless Steel For Factory Cars Only (Picture Does Not Represent Actual Part) Manufactured By: Inline Tube in the USA Unlike the cheap overseas made kits Inline Tube manufacturers our kits here in the USA This is Inline Tube concourse restoration part. 1/8 in. The 2nd generation trans had the return line moved back on the case to the center bearing for improved lubrication. Fitting Size. From the factory, 2 lines come out of the passenger side of the transmission and run to the front of the car. Toggle menu (844) 298-6404. It circulates the hot fluid away to the radiator via cooler lines and returns the cooled fluid back to the transmission. Thread73 posts · Joined 2005. Russell Transmission fittings are designed to replace OEM adapters in TH350, TH400, 700R4, 4L80 and additional applications that. #2 · Nov 21, 2011. 0 or 6. 0 out of 5 stars ( 5 )I am trying to convert cooler lines to all braided line up to the cooler in the radiator or maybe an external cooler. FREE Returns . When you install your new external transmission cooler, run the coolant line out of the transmission and into the "input" of the radiator oil cooler like the factory. 8 out of 5 stars 52. 4 4. 133 posts · Joined 2010. by Transmission Cooler Guide. Lowest Price Guarantee. Dorman Automatic Transmission Oil Cooler Line Fitting 800-604. #1 · Sep 27, 2013. 4L60E Transmission Cooler Replacement. cooler line fitting; push-in type; fits front, 3/8" durable steel construction; by teckpak usa; photo shows actual cooler line fittingTECKPAK FITZALL FS-210 Ford Push-In Cooler Line Fittings 11/16" Threads, 2 O Rings inside. Please check hose & fitting sizes prior to ordering since some. $38. These quick disconnect cooler lines feature fluid fittings that exceed flow requirements while connecting and disconnecting with 100% accuracy. Here's some thing to consider. 99. dans95 said: Has anyone replaced the transmission cooler lines from transmission to front of car. Ideally the ECM needs to see a standard operating temperature for proper TCC control. DO NOT REMOVE TORQUE CONVERTER BRACKET UNTIL YOU ARE READY TO INSTALL THE TRANSMISSION. Fitment:-Flexible SS Braided Transmission Cooler Hose Line GM Chevy 1996 & Newer 4L80E Transmission About 70" Length. Now I'm installing a 4l60e in my 57 chev truck, I bought AN fittings in 5/16 inverted flare to #6 hose. Transmission Line Adapter Fittings, Transmission Oil Cooler Fittings, Steel, 5/16 in. This kit only fits 4L80-E & 4L85-E transmissions from 1996+. Part #: 918-5602 Line: DOR. Bracket. some of the newer Aluminum Radiators may be the same way. flare fitting INS. 2. Opens in a new window or tab. Generally, vehicles with larger engines or higher performance transmissions will require a larger line size for adequate cooling. Automatic Transmission Cooler Lines, Stainless, Chevy, 4L60E, Pair. $16. Dorman 800-604 Transmission Line Fitting (3/8" x 1/4"-18) 2001-2008 GM Silverado/Sierra 2500HD/3500HD (See Applications) +$6. If your transmission lines have A/N fittings installed, you would have a case thread size of ¼ to 18 NPSM (straight thread). When replacing a GM 4l60E, its important to verify that you the correct cooler fitting style. 07-29-2017, 05:12 PM #2 ltmontana. Competitors Price $11. Transmission Line Adapters. Will fit years from 1982 - UP. Number of Cooling Rows: 13. Hayden 679 transmission cooler. A brass inverted-flare fitting is fine, you've got no more than 100 psi inside the cooler circuit. This cooler has 3/8" inverted flare fittings. If you have your heart set on a six-speed automatic to back your LS, consider TCI’s 6X transmission. The number of bolts that both contain is also different. DURABILITY - This transmission cooling line kit is made of high-strength PTFE(Teflon), which is resistant to high & low temperatures and is anti-corrosion. GVW: 29,200 (BTU) Fitting Size: 1/2″ NPT GSTP Transmission Adapter Fitting 6AN Flare to 1/4" NPSM for TH350 TH400 700R4 200-4R TR6060 AOD 4R100 4R70W C5 Transmission . CT9578 - A new oil cooler line fitting for TH350 TH350C TH350 TH250C & 700R4 transmissions. com FREE DELIVERY possible on eligible purchases Compatible With Turbo 350 (Some are 1/4" NPT) Turbo 400 Turbo 200 - 200R4 Power Glide (Some are 1/4" NPT) 700R4 - 4L60 - 4L60E - 4L65E 4L80E: 1995 & older Ford C4 - C6 - AOD Tips: 1. in Az where the Deer and Antelope play. Add To Cart. PLEASE READ THIS FIRSTApplications: 4L60E, 4T65E, and 4L80E. 00 Add to cart * 86C, Allison Mega Transmission Cooler $ 260. OEM. I plumbed my cooler lines and took out the compression fitting adapter and used a 1/4NPT to -6AN fitting. Here's some thing to consider. I will probably go try to have a replacement soft line made, and install it before cutting the original. Product Size- 3/8" hoses are about 55" and 58" long, respectively, with AN-6 mouth. We are dedicated to giving you the technical support you need, when you need it! If you are installing your transmission that was purchased from Monster Transmission, our sales. Helpful. It's usually withing 10* of the factory sensor in the pan. 3. Ford Automatic Transmission Application GuideModelYearsEngine Type / SizeTYPEAEROSTAR95V6 3. 4L60E Transmission Fluid & Cooler Line Routings (Sanity. What size are transmission cooler lines? Transmission Radiator end of fitting has 1/4″ MPT. #5 · Apr 8, 2020. A 9/16” wrench just rattles around on it. Find our best fitting transmission cooler line assemblies for your vehicle and enjoy free next day delivery or same day. Not Yet Reviewed. Exact fit for my LS swap 4L60E to 4L80E on my Chevy RSCB Truck BOWTIE4LIFE! Read more. 4l60e. I just know that I'd read 5/8"-18 inverted flare was the factory size for those radiator trans cooler line fittings, so that's what size -6AN adapters I bought for my 4L80E swap. DORMAN . Fittings, Transmission Cooler Line Adapter Type,. A) with an auxiliary cooler install after OE cooler return in. 3. Transmission Cooler Line O-Ring & Retainer Clip Set, GM Transmission 4L60E. So fill the. 700R4/4L60/4L60E/4L65E. This 4l60e transmission cooler lines diagram. Size: Torque: Accumulator Corver to Case Bolt: 2: M6. by Transmission Cooler Guide. Quality replacement - this transmission cooler connector matches the fit and function of the original equipment connector ;. That "o-ring" looks more like a face seal. Fitting Attachment 1: Male threads. One side has the wrong thread pitch and the other is the. Lower line is pressure and top line is return. Regarding factory coolers for trucks, GM SUVs, etc. 24hrsparkey Discussion starter. I tried: -New o rings, x 4. 4l60e Transmission Coolers Chevrolet Trailblazer Transmission Cooler Lines. ICT Billet - Transmission Adapter Fittings Front and Rear -6AN Flare to 1/4" NPSM TH350 TH400 4L60E 700R4 200-4R TR6060 AOD 4R100 4R70W C5 Aluminum. The size of the line needed depends on the specific vehicle and transmission type. 6AN hoses with swivel ends: 7/16'' O. Shop Transmission Line Adapter Fittings at Summit Racing. 23: $0. 10 times better than a piece of hose. 8L 5. 2 out of 5 stars 143 ratings. Buy on Amazon: 8: Compatible. TCI Transmission Cooler Line Fittings 831013. What size are TH350 cooler lines?-6 x 1/4NPS is the correct size for GM turbo 350, Turbo 400, 700R4, 4L60E and many other GM transmissions. Cooler size: 8. Part Number: SUM-230322-B. Buy Wztepeng 52 Inch 700r4 AN6 Transmission Cooler Hose Fitting with Braided Line Compatible With Chevy Ford. Sponsored. PLEASE READ THIS FIRST. The Grumpy Grease Monkey mechanical engineer. torqueflow part 900390. 9. Amazon. "C" Fits 5. Sent from my HiDiNg PlAcE. 3. We used high-pressure Earl’s braided steel -6 AN lines and fittings to connect the trans to the cooler and ensure a durable, leak-free connection. The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain >. You push the line and a clip holds the line in. Sold as a pair and includes the spring clips to hold the cooler lined together. While many GM trucks come factory with an external cooler, it is not big enough to provide the cooling needed. Shunevade SS Braided Transmission Cooler Hose Line Compatible with Chevy 1996-2021 700R4 4L60 4L60E 4L65E 4L80E: 9. Checked out rockauto. Cooler RETURN fitting ( Horizontal-points towards front of car) 1/4-18 NPSF. Hayden 679 transmission cooler. 1 out of 5 stars 41 ratings Cooler Line-Transmission-Stainless Steel-2 Piece Diesel : 4 Wheel Drive 3/4 Ton 88-94: 1: $79. Find Transmission Line Adapter Fittings 4L60E Transmission Model and get Free Shipping on Orders Over $109 at Summit Racing! 4L65E / 700R4 / 4L60 / 4L60E Cooler Line Fitting, 5/16" x 1/4" (82-Up) A Brand 4L65E, 700-R4, 4L60, 4L60E cooler line filling. Gasket Or Seal Included:. 4L60E Transmission Fluid & Cooler Line Routings (Sanity. 99. The bottom pressure port on the tranny should be hooked to the top port on your radiator. Material: Steel/Rubber. Name Condition Transmission model Country Country Price; COOLER LINE FITTING 4L60E SNAP IN TYPE 4L65E 4L70E TRANSMISSION OEM M30 M32 M70 Shift Rite TransmissionsFind Parts and Accessories 4l60e cooler line fittings KEYWORD and get Free Shipping on Orders Over $109 at Summit Racing!Buy PQY 70" 6AN SS Braided Transmission Cooler Hose Lines Kit Compatible with Ford C6/AOD & GM Chevy 1996-2021 for. Is there a thermostat in-line somewhere in the trans for the cooler lines, or does it rely on the stock cooler ebing part of the radiator to help bring the trans up to temp as well?. M. Hayden 1/2 Inch Oil Cooler Fitting - 388. 4L60E Transmission Cooler Line Size . 4l60e. Tighten the bolts to 12 Nm (106 lb in). Show More. Part Number: RNB-800-619. The sender is the same size as the plug so that was easy. 4L60e transmission cooler fitting for fluid exchange. Amazon. Automatic Transmission Cooler Lines, 7 Foot Length, Flexible, Braided Stainless Steel, Black, PTFE, 4L60, 700R4, TH350, TH400, Pair. Not Yet Reviewed. GM Transmission Line, 1/4" NPSM to -6AN Hose Adapter Set Used to replace factory quick disconnect cooler hard lines with AN style hose and fittings. GM Transmission Cooler Fittings. All Pick Up in Store. Fitting Location: Thread Size: Flow Direction: Upper: 1 / 8 ” Pipe. It is a great size to fit into tight spaces;. — Male hosebarb threads into the transmission line fitting. This kit has been designed to simplify the installation of these coolers, while providing a great looking, lightweight, and extremely durable design. Earl's Performance Transmission Cooler Line Adapters. 4l80e Transmission Filter. Thx! Clear Image Tri-Ys & Hi-Flow cats >> 2. 6 out of 5 stars 142. Upgrade the transmission cooler to keep your 4l80e transmission running longer. End 2 Fitting Type: Female Threaded. 🔧【Features & Size】This 6an transmission cooler kit is flexible , each 3/8" inner diameter hose is approximately 52" in length, and comes with an AN-6 inverted torch end; single-channel and dual-channel coolers are installed. Buy JSDAN 4L60E 6 AN x 1/4NPS Transmission Cooler Adapter Fittings Front and Rear -AOD TH350 TH400 700R4 200-4R TR6060 4R100 4R70W C5. 34 Outside Diameter: . Share. Braided Cooler Line Kit with 90 Degree Hose Ends and 1/4" NSP Fittings for 4L80E Specifications Inside Diameter: . Monster. Fitting Attachment 2: Male AN . 2nd one looks like a 4L80E with an auxiliary cooler and a down flow radiator. $11. A. Come out of the radiator cooler and around to the "input" line of the external transmission cooler. The cooler has AN-10 male fittings on it. This fitting consists of 1/2 inch-20 inverted flare with recessed internal threads. I have just developed a leak on the upper outlet fitting for the tranny cooler lines on my 4l60e. Feb 12, 2020. Transmission Line Adapter Fittings, Billet Aluminum, Natural, 1/4 in. VAN FULL SIZE 1500-2500: 95-11: 4 SP RWD: V6 4. It's usually 3/8" OD. Used store-bought pre-made 5/16 nickel/copper brake lines (60") from a local auto parts store. Add to Cart. Coaxial line (seen in Figure 3. GM Genuine Parts 19125677 Automatic Transmission Fluid Cooler Line Fitting . 10623 posts · Joined 2002. Fitting Size: 3/8 Inch. What size are transmission cooler line fittings? Usually found in automotive applications, transmission line fitting is a type of connection used to secure the transmission line to the transmission. com: JSDAN 4L60E 6 AN x 1/4NPS Transmission Cooler Adapter Fittings Front and Rear -AOD TH350 TH400 700R4 200-4R TR6060 4R100 4R70W C5. #1 · Aug 29, 2018. 99. NPS Male Threads, -6 AN Male AN, 4L60E, AOD, C5, TH350, TH400, Each. This will allow hose to be connected to the transmission cooler line without having to flare factory line.