th350 cooler lines diagram. TH700R4: As the TH350 lacks overdrive, many installers will opt for the GM TH700R-4 automatic. th350 cooler lines diagram

 
TH700R4: As the TH350 lacks overdrive, many installers will opt for the GM TH700R-4 automaticth350 cooler lines diagram  QTY RequiredSurface Studio vs iMac – Which Should You Pick? 5 Ways to Connect Wireless Headphones to TV

$135. But to use an aluminum line that is designed as a carburated application fuel line for trans cooler line is asking for trouble. The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current. 5 converter, the overall requirement is around 10. Part Number: RSD-FTV7801. (Passenger Side) You can see here that the bottom line has the "valve" on it. The lower line from the TH350, 400, or powerglide tranny is out. folkenheath Volcano Manifolds. Perhaps someone here can help. Welcome to our blog, where we dive into the fascinating world of life knowledge, exploring topics ranging from scientific and. TH350 Pressure and Return Lines? Hey all - OK - I'm being kinda lazy on this one. 1 - 4 of 4 Posts. Apparently the line with adapters and hose clamp bolt heads were beating against the radiator, eventually wearing a hole in it. Web web automatic transmission cooler lines, 5 foot length, flexible, braided stainless steel, ptfe, 4l60, 700r4, th350,. Surface Studio vs iMac – Which Should You Pick? 5 Ways to Connect Wireless Headphones to TV. The 6. If you are restoring the car, you'll probobly want a new crossmember that's not trimmed. A loss of fluid leading to an overheated transmission can be devastating as the system loses its ability to cool. 95. Web diagram th350 cooler lines in and out thursday, october 27, 2022 edit. The Moroso line that you recommend is stricly a low PSI high volume seamless line (minimum line pressure of a t-350 is 55 psi). is there any definate answer, if is is the upper or lower is the return line, it is critical for me to now, because i need to put a one-way valve in the return line,since the check-valve in the pump quit working . 10 Diagram Th350 Cooler Lines In And Out Luceeinayat. Flatdog, Mar 19, 2006. By using an electric gauge with a switch and three senders I can monitor feed out to the cooler, cooler return, and sump as I choose to. trans cooler lines for a 1970 TH350. Transmission Cooler Lines, TH350, 2pc Stainless Steel. Not Yet Reviewed. 10 Diagram Th350 Cooler Lines In And Out Luceeinayat There are pre bent transmission cooling lines made, but since this is't a factory car you're dealing with, some modification would most likely be required (shortening lengthening); it would depend on how your radiator is mounted compared to a stock one (forward backward). 4l60e Cooler Line Flow Direction. The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain: Trans Cooler Lines TH350Some auto trans will live with lines blocked off. This line is used to control the shift points of the transmission. In a hurry. Web official suzuki parts list easy repairs with. Make sure to adjust the TV cable with the video’s help. 2. Year. 2 Pc Kit – OE Steel . Smart Living Transform Your Home with These Cutting-Edge GadgetsRight Stuff Detailing Automatic Transmission Vacuum Lines FTV7801. TH-350C Drive Shell. Transmission Oil Cooler Fittings. It is a 355 with around 400hp and a 274 duration cam. Weve got a great one right here that will help you get the job done quickly and. This car didn't have the trans lines when I bought it. i tried a new rubber o ring still leaks. Stage 1 TH350 – 500+ HP/TQ. Th350 Oil Flow Diagram Quick Turbo 350 question on cooling lines Page1 Chevy. Web pour at least 1 quart of clean atf slowly into the torque converter. Opens in a new window or tab. The TH350 takes about 4 quarts in the pan, and then requires additional based on the torque converter being used. Transmission - Transmission Oil Cooler Lines. Compare. Remove the skid plate and the splash guard (if applicable). 95: In Stock. Cooler inlet installation (See Diagram #1) The In-line Thermostat Fitting is provided with a -8AN male and. mine were taken off years ago and not sure how to route them up to the. Install at least one bolt on each side of the bellhousing. Cooling lines on turbo 350 which is oil out which is return. 95. 1403 18,000 12” X 7 ½”. Does it even matter?. 427sleeper and Pops @ Tri-5. Chevy 350 Parts Diagram ImageResizerTool Com. The Bottom line is the Feed/Out which has pressure. Powerglide - Dedenbear. Th Transmission Diagram. which is the output line on a turbo 350 pirate 4x4 web sep 23 2006 th350 th250 fitting location thread size flow direction upper 1 8 pipe return in lower 1 8 pipeIn this video we show you how to replace a transmission cooler line on an older Jeep Cherokee XJ. TH350, TH250. Part Number: FNL-CTC6805OM. I just flushed my 700 by draining the return line from the cooler. T 350 cooler lines Hot Rod Forum Hotrodders. I made new lines and installed a cooler when I installed the tranny. $71. The primary benefit of installing a transmission cooler line diagram is improved reliability and performance. This enables the fluid to rise and push the air out of the rad cooler. TH350. 1 post · Joined 2008. The cooler core will flow in either direction, there is no specified inlet or outlet port. Clean the tube and make sure it isn't cracked at the indent (common). Im sure someone will come along that knows which line is pressure and which is return. 35". The 200-4R is a 4-speed automatic overdrive transmission by GM, capable of fitting into most Chevy’s from the 80s and before, built similarly to the TH200 and TH350, as well as the 2-speed Powerglide. That's actually incorrect i believe. The reasoning was the radiator is cooler at the bottom. It circulates the hot fluid away to the radiator via cooler lines and returns the cooled fluid back to the transmission. All lines are formed utilizing the correct automotive grade, OE or stainless steel tubing and includes the correct style flares, fittings and protective wrap, installed on the linline to the transmission case. Designdoes anyone have pics or can explain the routing of the trans lines to the cooler. Acemechanic. This was my first time I did this and was a little late with filling the pan again. MoparPartsGiant. Note: This location is recom-mended to monitor the true transmission temperature going in, as well as checking the oil cooler efficiency. Transmission Cooler Line, TH350/400, 1966-67 Chevelle/El Camino. 6L/5. Transmission lines are sold as pairs. the only thing that's needed to install a 350 is to trim the crossmember. THM cooler line ports. I ordered new parts from europarts-sd. Stick with the factory brass fittings and get the inverted flare to -6AN that fits into those. Rating: 100%. (OS1) $53. JEGS Automatic Transmission Cooler Line Kit for GM TH350/TH400/700R4. Increased line pressure and lube flow. 3/8 6AN 20FT, Nylon Stainless Steel Braided Fuel Line Oil/Gas/Fuel Hose End Fitting Hose with 10PCS Swivel Fitting Adapter Kit - Black. Great condition. Chevy GMC 81-91. This is an old draft of some TH400 oil pump technical. you can call ATI and get the proper fittings, 1/4-20 STRAIGHT to #6 or #8 AN. Tony. Here are the steps you need to take to change your Silverado’s transmission cooler lines: 1. All you have to do is crack open a line and crank over the engine. 1970 315hp/410ftlb buick 350 code sp stock w/ 800cfm qjet and crower level 3 cam (rip) and th350 #2 (rip). Are your transmission cooler lines leaking? This video is here to help you perform a quick, easy, and dirty repair to STOP them from leaking. . On a TH350. Part No GVW SIZE. This 26 4l60e Transmission Cooler Lines Diagram – Wiring Database has px x Lower line out of TH to the lower radiator trans cooler fitting. Nova Transmission Lines. Also fits Transmissions w/ 1/4 in. Combined Cancer/Birth Defect WARNING This product can expose you to chemicals including Cadmium which is known to the State of California to cause cancer on birth defects or other reproductive harm. 167. Optimal transmission temp is about. With this information, you should be able to confidently install and maintain your own turbo 350 transmission cooler lines with ease! TH350 Transmission Cooler Lines. place in Drive for 10 seconds to activate the transmission pump and shut off the engine. The outlet going back to the trans is on the dr side--line has a right angle turn. Dorman Automatic Transmission Cooler Lines 624-051. NPSM or 1/4 in. TH-350C Bushings. Cutlass442. The way @baldilocks explains it the cooling goes: Hot oil from the transmission to the passenger side bottom radiator. Recently Viewed. Fluid Cooler Lines (229) Air Conditioning Hoses and Lines (181) Oil Cooler Lines (121) Brake Hoses, Sets (50) Hose Kits, Cooling System (34). 2 Line set with 1/2" fitting at radiator. THM 350 cooler line ports. General motors turbo hydramatic 350,th350,turbo 350, help you build,turbo350,thm350. Transmission Coolers. Th350 Transmission Parts Diagram 913 subscribers 6. I'm having a bit of trouble routing the lines, though. Loading Estimated Ship Date: Nov 27, 2023 if ordered today. Add To Cart. Design GM transmission cooler fittings-AN6-1/4NPS transmission cooler fittings ; Material:Aluminium -6 x 1/4NPS is the correct size for GM turbo 350, Turbo 400, 700R4, 4L60E and many other GM transmissions. Replacement Cooper Washers - AF59-3750. TH350. Web Lower line out of TH350 to the lower radiator trans cooler fitting. Not Yet Reviewed. Remove the two transmission cooler lines from the side of the transmission with a flare nut wrench. Shop for New Auto Parts at 1AAuto. 95. . 454, TH400, NP205, 6" Susp Lift,. Vocational, Technical or Tra. Gm turbo 350 performance transmission level 2Cable transmission tv diagram 700r4 350 turbo 700r adjustment shift trans rebuild guide chevy wiring gm 4r efi adjusting bracket Good diagram of the turbo 350 valve bodyTh350 routing radiator technical. Transmission Cooler Lines 1967-69 Chevrolet Camaro Transmission Oil Cooler Line Stainless Steel. Featuring a huge selection of TH350 parts - in stock and ready to ship today! Talk to the experts. O-Ring. Th350 installing transmission cooler lines and. This is my first draft of a write-up of the process to convert a TH350 3-speed auto LATE 2nd gen Camaro to a 2004R 4-speed Overdrive tranny. 75:1 overdrive. Based on the actual diagram, the cooler line flow is not too. #1. The aux cooler should be mounted in such a fashion as to not trap air. STEP 1 Remove transmission from vehicle. NEW HAYDEN 1403 TRANSAVER TRANSMISSION OIL COOLER. A radiator has the upper inlet introducing the hot coolant from the engine into the radiator. I'm getting some 1/2" x 20-to-AN6 adapters from Jeg's so that I can use my leftover AN6 hose and fittings to make new transmission cooler lines from the TH350 to the radiator. All you need is a little 7" X 9" or 8" X 11" thin cooler out in front of the Rad or in front of the A/C condenser. park neutral position switch4l60e wiring diagram 4l60e tcc wiring diagram4 images 4l60e transmission cooler lines diagram and view. Specializing in C3 Chevrolet Corvette Parts since 1977. The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM. Thoughts, suggestions? Turbo 350 Transmission Cooler Line Diagram. Does Consistent 10. If you run a pipe threaded fitting into it you can or most likely will crack the case. The 350th has the same routing as a 700R4. 24 Exedy TH350C LowRev Clutch Frictions 69-86 25T 86415133832386 DAG02640 Ganzeboom Transmission Parts & Torque. 79. Because the transmission lengths are the same and the positioning of the crossmember can be easily modified, you need only change the transmission mount, add transmission cooler lines and change the shift indicator bezel to a TH350 shift pattern to complete the exchange. Diagram Manual Gm Turbo 350 Transmission Diagram. i went with flex steel lines but my problem is. Powerglide - OEM. 67 Chevelle Malibu SS Cdn. Help wiring lockup on th350c discussion in. Hello. Engine: 6 Cyl 5. Author. * Or ** after the sell price means your order will incur an Oversize Part Charge for each oversized part. Thx. Additionally, it helps reduce wear on parts due to friction caused by high. org. Top. Dorman offers hundreds of transmission oil cooler lines to help repair leaking, rusted or clogged lines and keep transmissions running properly. Have someone watch it. And the overall length of transmission and adapter is 23. As already mentioned, the flow direction of the transmission cooler is such that the top hose attachment is the hotline, and the bottom one is the cold line. This video shows you how to change out those old lines. Transmission Vacuum Line, Steel, Pontiac, TH400, Each. 68. Just pulled out my TH350 and that's the way it was. Notes: We can get the TH350 Trans Cooler Lines also or have them Drop Shipped. Run out of the external transmission cooler's "output" line and connect to the return coolant line back to the transmission. 3 @ 72mph in the 1/8th with 2. Rear ¼" Pipe Return/in. The cooler of the two lines is the return line which should be the top. Compare. Product Details. Diagram Th350 Cooler Lines In And Out diagram-th350-cooler-lines-in-and-out 2 Downloaded from staging. Chevy 350 Wiring Rear Axle Chevy 350 Freeze Plug Diagram Turbo 350 Th350 Oil Flow Diagram fraurosheweltsale de May 8th, 2018 - Th350 Oil Flow Diagram Th350. Part Number: RSD-ATV7005. Install at least one bolt on each side of the bellhousing. As the transmission is raised into position, slide it over the dowel pins. The TH350 is rebuilt stock with shift kit and a Saturday night special tci converter. Retail: $23. View Turbo 350 (TH350) transmission cooler line diagrams and cooler flow path that route to the radiator and to an external transmission cooler. 4272 (502×700)350 transmission turbo diagram gm chevy th350 700r4 transmissions specs engine chart trans identify 350c rebuild identification parts type lookup. If you haven't. Its identification, for instance, helps you to This 26 4l60e Transmission Cooler Lines Diagram – Wiring Database has px x px resolution. Replacement Oil Cooler Lines on Amazon - 39660 1/2" x 3/8" Transmission Oil Cooler Line Scissor on Amazon - GM Customer Satisfaction Program number: N212326940. Author. Welcome Guest Log In. The filter works to keep contaminants from wearing parts from your transmission fluid. Out from the driver side bottom radiator. Now with TH350 #3 with TransGo 350-1-2 Shift Kit, 2500 stall Hughes Converter, GN 8. brass adapters that were used with the fac. Remove these two fittings. . "A" Fits Suburbans with small block and 4 bbl carburetor. 8 Hrs. GM TH350/TH400/700R4. Transmission Cooler Hose Line 70 Inch Flexible Stainless Steel SS Braided Oil Fuel Line Compatible with GM Chevy 1996 & Newer 4L80E 700R4 4L60 4L60E 4L65E,Turbo 350 400 200-200R4 Dorman 624-284 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Chrysler/Dodge/Ram Models, Silver 32,966. Fits 19661967 Chevrolet Chevelle 19661967 Chevrolet El Camino. On a hot engine the fluid going into the top of the trans cooler is hotter that the fluid coming out the bottom. TH400/3L80/3L80H . 1. TH125/125C (3T40) Top. org. 1. Chevy Transmission Cooler Lines Diagram. Color Wiring Diagrams; Keyed Alike Lock Sets; Electronic Tachometer Conversion; C1 Shop & Service Manuals;. We just updated our "Avalanche" Buggy to LM7 5. Upper ¼ Pipe Returnin. Automatic Transmission Cooler Line Kit; GM TH350/TH400/700R4; Also fits Transmissions w/ 1/4 in. this pressure helps to keep the fluid temperature steady and also prevents damage to the internal components of the transmission due to extreme wear or heat. What you need to know about GM Chevy transmission cooler line removal. It is a 355 with around 400hp and a. skip to main content. Not Yet Reviewed. 0122, 7am-10pm, everyday. • transmission cooler lines • gear selector linkage • throttle (or kickdown) wiring, cables or linkage • speedometer cableBut to use an aluminum line that is designed as a carburated application fuel line for trans cooler line is asking for trouble. cooler only. #2 · Dec 10, 2021 vics63 said: I've searched here and elsewhere for hours on end and can't find a definitive answer. Sometimes they don't seem to leak unless the engine is off and parked for awhile. 71 1/2 & 3/4 Ton truck 4 wheel drive transmission cooler lines for TH350 or TH400 manufactured in stainless steel. Weve got a great one right here that will help you get the job done. From what I read the hottest oil (from the converter) goes to the cooler. which causes all the fuild to drain out it i,f it sits for very long. It is a 355 with around 400hp and a. TH-350C Extension Housing. 1 post · Joined 2008. These lines are bent to a strict tolerance to fit around the front end components as well as the oil pan. Web automatic transmission cooler lines, 7 foot length, flexible, braided stainless steel, ptfe, 4l60, 700r4, th350, th400, pair. GMOTM Winner. Ask The Experts a Question >> Nova Transmission Lines at SS396. Transmission Cooler Lines-Stainless Steel-2 Piece "A" "A" Fits models with TH350 or TH400 transmission. Th350 Cooler Lines Diagram 3 3 marked↵ a milestone in automotive history. th 350 cooler line oil flow hot rod forum. com. Sponsored. TH350 cooler flow; Welcome to Club Hot Rod! The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. These exact reproductions come in pairs. $24. Th350 Cooler Lines Diagram. Get the Best Performance with JEGS Automatic Transmission Cooler Line Kit for GM TH350/TH400/700R4 113601K parts at JEGS. Should be in the top, out the bottom, through your cooler then to your radiator. blogspot. Vendor. We have 9 Images. 05 inches up to 4. Th cooling line diagram On my truck I am using rubber tranny cooler lines form the tranny all the way to the radiator. 3. This kit uses Fragola Made in the USA lines and fittings! GM TH350, TH400, 700R4, 4L60E DERALE Trans Cooler Kit w/Fan & Fragola Lines/Fittings This kit allows you to grab everything you need to plumb up a very efficient transmission. The top line is return/in, it doesn't have suction so. He’s gonna tear down his built TH350 transmission just for you. Configure ItemA 4L60E weighs approx. There are also fittings to use an inverted flare or AN cooler line from the case fitting. GM TH400 Automatic Transmission. Click Here to Request a Catalog! Toggle navigation Menu. Th350 Lock Up Wiring Diagram Use a light in circuit with the 12 volt feed and use the switch on the 12 volt side. transmission has leaked out of the connection of the fill tube transmission since i bought it. Product Q&A View Now. Part Number: SSH-OCL206S. At trans, top port is return from radiator, and bottom port is the hot line going to radiator. Fits 1968 – 1971 Buick A Body w/TH400. With the cooler installed and the hoses attached, I was in business to keep that TH400 nice and cool with a clean look and top. Fits ST300, TH350 & TH400. Reply Quote. This item 6AN 70" Transmission Fluid Oil Cooler Hose Line kit for GM Chevy Transmission 4L80E TH350 TH400 4L60E 700R4 200-4R TR6060 Ford AOD 4R100 4R70W and C5 Stainless Steel Braided PTFE Hose Sineside AN6 Flexible Transmission Cooler Lines and Fittings, 2Pcs 7FT PTFE Lined Braided Stainless Steel and Nylon Hose, Replace 700R4/4L60 /TH350. Automatic Transmission cooler line flow. Bottom port on the trans is the pressure side. JEGS 113601K The transmission cooling line system is vital to any automatic transmission. . These preformed transmission lines replace the original transmission cooler lines and run from transmission to radiator following the factory routing. 99. The turbo350 uses two brass fittings for the steel cooler lines to screw into. All transmission cooler lines come with correct double clips and original steel tubing. (top or bottom on tranny) Ag. Lowest Price Guarantee. 1979 Firebird and Trans Am Transmission Cooler Line Set for Olds 403 Engine Turbo 350, 5/16" Stainless Steel. I'm getting ready to install a remote trans filter. 00. Heated Transmission Cooler Flush Machine Overview. The above size would be if you wanted to pull the brass fitting out of the case of. 1968 Camaro. Lokar. Add To Cart. Cooler line swap. I destroyed the old cooler lines when I removed the engine, so I had to replace the cooler lines. The cooler of the two lines is the return line and the one to install the transmission cooler on. Chris. ( 6 ) Estimated Ship Date: Monday 11/20/2023. Cut the steel tube oil line in a convenient location using aFamous Turbo 350 Transmission Cooler Lines Diagram 2022. The Turbo 350 soon established a reputation for being strong, versatile, and compact. { a 350 has a ball and seat that blows off to let oil circlale. I bought a set of "1958-1963 Chevy Automatic Transmission Oil Cooling Lines Turbo Hydra-Matic 350 & 400" from Eckler's but since the car was not a stock auto, I am not sure how the lines route. if your trans has the fac. Web so i'm working on swapping a th350 into my car,. a vacuum line. Get the vehicle up in the air with the use of either a jack and jack stands or ramps. Order Chevrolet Impala Auto Trans Oil Cooler Line Fitting online today. Disconnect the transmission cooler lines from the transmission. 8 out of 5 stars twotone64. lines; b) replace the torque converter; and c) replace any auxiliary transmission cooler(s) (if applicable). 135-140 lbs, a TH400 weighs 135 lbs, a TH350 weighs 125 lbs. Transmission Cooler Guides & Info. So one is above the other inlet/outlet to the cooler. ( 1 ) Estimated Ship Date: Nov 27, 2023 (if ordered today) Special Order. Summit Racing™ Flexible Automatic Transmission Cooler Lines SUM-230322. This is an old draft of some TH400 oil pump technical. Regarding factory coolers for trucks, GM SUVs, etc. Add To Cart. #6 · Feb 20, 2014. Our Price: $83. This reduces the heat being introduced to the radiator, which is usually. Turbo 350 diagram turbo 350 transmission rebuild manual. Derale. Includes 2 small "C" spring clips for mounting. Web Technical Routing Lines From Th350 To Radiator The H A M B TH350 Fitting Location - Flow Direction Upper - Returnin Blue Line Lower - Feedout Red Line Ive always ran. It has several key modifications that increase it’s strength. Worth repeating: Modulator O-ring. Slide the transmission forward on the alignment studs and onto the dowel pins. If the transmission cooler runs horizontally, it doesn't matter whether the trans fluid runs to the left or to the right. Cooler line swap. 34-5695. Save Share. 215. 562-inches and a height from 3. Check out free battery charging and engine diagnostic testing while you are in store. 05 inches up to 4. Then the bottom line goes back to the transmission with the cooler fluid. Slide the transmission forward on the alignment studs and onto the dowel pins. 5 w/3. Exchanging a Powerglide for a TH350 is a pretty basic swap. Restoparts Transmission Cooler Line Th350 400 1968 72 Cutlass Opgi ComTurbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors. Transmission Cooler Lines-Stainless Steel-2 Piece "A". Vendor. 1978-1980 El. December 4, 2022. Correct for 1964-67. A loss of fluid leading to an overheated transmission can be devastating as the system loses its ability to cool. 700r4 oil flow schematic wordpress com. * TH-200-4R (1986-1988): DaddyJeep Garage 913 subscribers 6. Stainless Steel. Since I do not drive my cars in Freezing weather I have never hooked up the Trans lines to the Rad, just to the Trans Cooler as I see no reason to heating up the Trans Fluid with the hot Rad Fluid. #2 on Diagram Only-Genuine OE Factory Original Item. Brand New. Th350 powerglide trifive Turbo 350 vacuum line hook up Transmission th350 lockup hydramatic Th350 vacuum line diagram. Turbo 350 vacuum line hook up | help wiring lockup on th350c. (national pipe thread size. Compare. 2 Wheel Drive 8 Cylinder 67-72: 1: $64. Ad Buy Online Save Big. Even better than that, one could dream up a thermostat controlled line system where NONE of the fluid goes to the radiator or external cooler until it warms up. Outer line furthest from converter: 440-T4 (4T60) Horizontal (smaller brass) case fitting: 700-R4 (4L60) Top: Sprint (MX17) Bottom: Spectrum (Toyota A130L) Bottom: Nova 3 speed (Jatco F3A) Bottom, line nearest pump: Nova 4 speed (Toyota A240E) Bottom: Aluminum Power Glide : Top: Allison 1000 : Cooler Manifold: 03-72LE (A44DE) Rear: Honda: 2, 3. Basically, any cooler with a face height up to 18½ inches can be created. #15 · Jun 28, 2020. 468/TH400 2,500 stall / S60 3. 7K views 2 years ago Replacing the kinked and leaking steel transmission cooler lines with NiCopp lines. Make sure the cooler tube connec-tor fittings are tight in transmission case first, then con-nect cooler lines and tighten the tube compression nuts with a fitting wrench to avoid damaging the nuts. - 8 in. Transmission lines are sold as pairs. The PR valve limits or regulates pressures to the common 50-250 psi range seen in transmissions. com 1978 - 1981 Firebird and Trans Am Transmission Cooler Line Set for Turbo 350, 5/16" Original Steel New transmission cooler lines for your 78 - 81 Firebird or Trans Am. if you haven't started using nicop over steel, you are missing. 5/16 lines, you can also use flare to AN. May 13th, 2018 - Which line is the outgoing line to the tranny cooler on a TH350 T 350 cooler lines Fitting Location Thread Size Flow Direction 3 /. High Performance Turbo Transmission.