Th350 vent tube location. html>rp

It can handle up to 700 horsepower and control as much as 400 lb-ft of torque. The O ring is bad on the tube or the air vent hole is stopped up. Showing all 4 results. All TH400 variants come from the factory with a metal tag riveted in place on the passenger side of the unit. 0 Review (s) 0. 74 -> 1. Tilt the pan down at one end to drain the remainder of the fluid. SHARE POST #9. Categories. Make sure and keep the dipstick tube in when you do it. When combined with a 9. com FREE DELIVERY possible on eligible purchases Jul 9, 2014 · 1987. Description. models916, Jul 17, 2014. Covers servicing, rebuilding, parts selection and performance/heavy duty upgrades for your TH350. Before you pull the trans. And the super-tuning of this unit ensures that you can improve its performance Sep 6, 2022 · TH350 dipstick tube removal. I keep getting fluid coming out of my overflow tube (PS transmission) on my TH350 and the fluid level hot is half way between the marks on the dip stick tube. 0 LQ4, Summit pistons, 244/259@. 0. I show and discuss that just changing the Modulator may not help anything. The filter is held in with two screws. Apr 1, 2018 · While a vehicle with 4. Material: Nylon. 5", and stuff it into the hole. Heard a pop and more fluid but NOW problem solved. What I discovered is that not all O-rings are created equal. 2 Year LIMITED WARRANTY. Sonnax 57510-01, Powerglide / TH400 High RPM Checkball Capsule. TH350 and Powerglide Case Vent Tube. com FREE DELIVERY possible on eligible purchases Amazon. The 700R4 goes from a 3. Jun 18, 2013. 1,662. Hey All, I recently rebuilt my TH350, everything appears to work fine except for a mystery leak out of the dipstick/fill tube. I believe TCI and Hughes sells a top hat boot seal also for the TH350. Oct 24, 2021 · Vent tube location on T-350 Where is the vent tube located on a th350? :confused: www. 3048 posts · Joined 2006. Polaris routs the vent tube near the radiator cap, and into a hole in the frame just left of the radiator. Plastic Vent Tube for TH400 / 700R4 / 200-4R / 4L60E Transmissions. The Turbo 350 transmission, commonly known as the TH350, was a 3 speed automatic transmission that began phasing out the GM Powerglide in 1969. 050 637/612 Jones cam, Holley Split Race, Holley 850 Street HP, msd 6014, 11. com FREE DELIVERY possible on eligible purchases Jan 11, 2018 · Jacksonville, FL. I did get it in, we will see how it goes. Pull the dust pan off and look up at the torque converter you should be able to see the front pump housing. If not that, than have a transmission shop check for internal problems. I’m thinking one of two things. 2005 Harley Sportster 1200C. $69. We always assume the "hiss" is pressure; but can also be a vacuum. 39 posts · Joined 2008. Jun 24, 2021 · Episode 97 of Bad Hombre Garage: my car has been leaking transmission fluid pretty bad, and the speedometer isn't very accurate. So my th350 has a fluid leak that seems to happen all the time but most noticeably at high rpm heavy acceleration. patreon. $ 1 — $ 8279. I then decided to try and find a slightly thicker version of the proper O-ring for this tube. I can tell you exactly where the 700R4's is, but here's a stock picture of a TH350. 82-to-1 /1. Jan 18, 2012 · Posts: 14,950. R10. This is the vent with a cap that goes in the upper part of the transmission case. Sometimes they don't seem to leak unless the engine is off and parked for awhile. Posts. Where is the vent tube on a 700R4 transmission? your right. All the problem areas that could leak have been taken care (dipstick, cooling lines, detent cable, pan gasket, rear seal, speedo cable, governor cover, accumulator cover). Delivery: Estimated between Fri, Feb 2 and Tue . TH350 vs 700R4 Apr 3, 2011 · TW Discussion starter. Connect the long nipple to a hose and stuff it down the tranny or whatever. Some replacement filters are an irregular shape Apr 29, 2024 · Find many great new & used options and get the best deals for (2 PACK) GM TH350 TH350C Plastic Case Vent Breather Tube TH-250/250C/350/350C at the best online prices at eBay! Free shipping for many products! Mar 12, 2007 · 6. Unfortunately, I have no history on this tranny, so the Remove the two slotted 1/4-20 screws that hold the filter to the valve body. I'm thinking one of two things. Common as dirt on TH 350. justpassinthru, Dec 7, 2022. These are the overdrive transmissions. 5/4 drop Frame of resto has been started Mar 12, 2007 · Need Help!!! My TH350 hasn’t been ran in a long while. squirrel, Jul 8, 2019. Apr 20, 2020 · As far as the TH350 goes, the vent goes in perpendicular to the long axis of the transmission, on the drivers side, and I would recommend NOT blowing anything into it. Maybe you can even use that "WELD Stik" stuff made by LOC-TITE which is a two part putty. Mar 24, 2017 · Buy (4 PACK) Plastic Case Vent Breather Tube"Jiggle Caps" fits TH350 TH350C TH250 TH250C: Breathers - Amazon. 06 -> 1. Location. 00 Add to cart. WE ARE NOT HERE TO RIP YOU OFF! Located in: Henning, Minnesota, United States. Designation Change: 3L80; 3L80-HD (1991) Matching Turbo Hydra Matic 375s, 400s and 475s with Associated Applications. Its identification, for instance, helps you to differentiate this one-piece unit from other transmissions launched by General Motors. Air should come out the vent at top. For example if you consistently see the out line temp at 230 degrees on a pass and it suddenly jumped to 260 degrees you would start looking for a problem where the pan may only change by 1 or 2 degrees. I did install a new pan, but it doesn't appear to be any different than 04-26-13 08:04 PM - Post# 2339353. if you just hear air escaping from the top of the tranny then it is coming out of the vent. This Jan 9, 2012 · The orange tube is broke was the vent. Apr 9, 2018 · Buy Combo Pack! Vent Breather Tube+Dipstick O-ring Seal GM TH-250/250C/350/350C TH350: Hard Parts - Amazon. 8" vent hole. 2 PK GM TH350 TH350C, TH250 TH250C Plastic Case Vent Breather Tube Jiggle Cap | eBay Feb 21, 2017 · I have a stock th350 in my 78 c10, 350 350 combo. Mar 21, 2016 · TH350 vent relocation. I strongly recommend replacing that tube for the simple reason it keeps dirt and water outside of the trans. That vacuum diagram and table is even more confusing than the one for my '75. I'd pop the pan off anyways, clean it all up and use a new dry gasket. At first I though I had a leaking seal. 57. I run a GPS speedo so on my trans I have the old drive gear in there and Jan 20, 2024 · THM400 (1964-1994) THM475 (1971-1990) Predecessor Transmissions: Powerglide, Hydramatic, Jetaway. In response to Bruisr. Ed. 69TAPoser Discussion starter. That's how I remember the Turbo 350 Trans lines. You should be able to find a provision in the case to be able to replace the vent tube. com/OUR WEBSITE - www. I checked the vent, seems clear. 1. , check the dipstick tube and the down shift cable area. Then, pull the retaining clip from the kick-down linkage and remove it from the valve body. 5:1, T-350, 501 Converter, 12 bolt Jun 5, 2024 · Fits: GM TH350, TH350C, TH250, TH250C Transmissions 1969 - on. Jul 26, 2010 · TH350 Strange Dipstick Leak. It might not look pretty, but since it isn Mar 23, 2017 · Fits many transmissions including: GM TH350, TH350C, TH250, TH250C FROM 1969 - on Also fits some differentials with 3. get someone to crawl under your truck and make sure air is coming out of that vent on the top drivers side of the transmission case. A lot of GM rear ends also use this style of vent. Does anyone have any pics of a TH350 with the vent relocated from the factory location to the extension housing? I've heard it mentioned that the extension housing is suitable for relocating the vent, but was curious to see some pics of exactly where to put it and what to plug the factory hole with. These can leak and seep around the pan gasket area and give the appearance of the front seal leaking. Aug 12, 2011 · 721 posts · Joined 2008. Either way, fluid would exit the lowest point of the tube, if not plugged up. Otherwise the trans Oct 26, 2022 · Where is the breather vent on a th350 transmission? Updated: 10/26/2022. 99. Truck Model. where is the serial number on vera bradley luggage. Have to top off the fluid fairly often. TH-350C Extension Housing. Then splits in to a why which goes to the top of the May 20, 2024 · Fits TH350, 350C, TH250, TH250C Automatics. #1 · Apr 3, 2011. Go get a car that has fairly decent manifold vacuum and connect the short nipple to full manifold vac with a long-ass piece of hose and start the engine. Upon returning home, the fluid was coming out the filler tube at the tranny case. . Apr 1, 2024 · GM TH350 TH350C Plastic Case Vent Breather Tube (TH-250/250C/3 50/350C) Wide World Transmission Parts Located in: Palmetto, Florida, United States. Mar 29, 2004 · 835 posts · Joined 2002. Believe it or not, I had to remove the passenger side header, disassemble the dipstick tube end, use a c-clamp to squeeze the base into tranny, and the re-assemble. Its more so coming from May 22, 2020 · The TH350 (Turbo-Hydramatic) transmission identification, decoding, and super-tuning are what sets it apart from other transmissions. Center Support Installation Step 1: Sep 16, 2010 · Just give the wire a twirl every half hour or so in order to prevent it from being bonded inside the tube, and make sure there's plenty of transmission fluid on it before you place it inside the vent tube orifice. Not a daily driver but making monthly dump runs. Take a good look at the pan rails for any deformities and use a hammer and dolly to smooth out any dimpled bolt holes - lots of guys will over torque the pan bolts when it seeps a bit and warp the pan - the Jan 29, 2017 · Shop Amazon for (10 PACK) Plastic Case Vent Breather Tube, fits GM TH350 TH350C TH-250/250C/350/350C and find millions of items, delivered faster than ever. Jun 17, 2013 · 2,109. E. Second: 1. May 28, 2024 · Looking for expert advice. It turned out to be a clogged vent tube. May 21, 2019 · Watch as we dive right into this 1977 Corvette and fix her minor vacuum leak coming from the vacuum transmission modulator, as well as give her a new feeling Jul 4, 2008 · 75gmck25. 67ssguy Discussion starter. Apr 10, 2018 · Contains: Plastic Case Vent Breather Tube "Jiggle Cap" + Filler-Tube/Dip-Stick Seal & Speedometer Adapter Seals Fits many transmissions including: * GM TH350, TH350C, TH250, TH250C FROM 1969 - on * THM-350 (THM350) * THM-350C (THM350C) * THM-250 (THM250) * THM-250C (THM250C) Warranty & Hassle-Free Return Policy: * 12 month manufacturer's replacement warranty for defective items purchased. Show More. ‘71 Malibu: 3580 #, 6. Jun 20, 2014 · 6. TH-350C Case. Delivery: Jun 10, 2008 · 2007 Blue Grizzly 700 w/ EPS -. I use B&M trick shift (conventional) fluid and a B&M Hi-Tek cooler mounted to front of radiator that is actively cooled by puller fans on the other side of radiator. Wiki User. I just rebuilt a TH400 and it is leaking from the vent tube. He shows you what tools to use, how to use the Oct 31, 2021 · I had a similar issue with atf on the top of my engine and exhaust manifold. Oct 12, 2023 · First: 1. Transmission Fitment: Plastic Vent Tube, TH400 / 700R4 / 200-4R / 4L60E Transmissions, 1964-2009, Browse our Shop for all your Heavy Duty and High Performance needs! Jan 28, 2013 · The locking dipstick is for 700 r4 transmissions. The factory spec for this O-ring is 3/4" OD - 9/16" ID - 3/32" W, which is exactly The good news as it relates to valve body problems is that the TH350 uses a cast-iron valve body with steel valves, making it rugged and nearly unaffected by over tightening fasteners. Color: Black. Weatherford Texas. V1500 Jimmy. It even leaks when the dipstick is out (no pressure)I am no expert and it's most likely something I did. there is a small vent tube about 1/4 in diameter on the top of the case left of center. And it leaks pretty bad. Need Help!!! My TH350 hasn t been run in a long while. at or below the throttle blades. I used a pick to loosen the dirt and compressed air. 50. 5 converter, the overall requirement is around 10 quarts. The only ball you really need is the one at the lower left above the modulator valve, all others can be left out and you will still have three speeds and lockup. 2004 Ford F250, Crew Cab, 4x4, 6. TH-350C Center Support. You must be registered for see images attach. Jul 7, 2019 · Usually just a new O ring will be all it needs, sometimes it will need a new tube-if it needs a new tube, get the later design, it is a LOT less prone to leaking. 5. I then went to put in fresh ATF and after 4 quarts, fluid began to come out the vent tube, located near the top of the trans. 700R4/4L60E Corvette Servo High Performance HD - Red Cover. The crankcase vent that connects on the underside of the airbox lid should be rerouted to the side of the airbox. Put me on the Waiting List. 26" Mud Bugs. . The newer style multi-lip, or "top hat" style seal should be available at most GM parts departments for about $3. Find Dorman Transmission Vent Tubes TH350 Transmission Type and get Free Shipping on Orders Over $109 at Summit Racing! Vent, push-in, Axle, Transmission case Install the center support and retaining spring next. Step 5. 0 Powerstroke. The vent on a th350 is on the driver side of the case almost directly above the shift linkage,8 inches or so up. (usually for power brakes), or on the front of the carb. It leaks from the pan, rear driveshaft seal, and speedo. Drill and tap a hole back into the water pump or use a fitting that routes it into the heater/radiator hose. Trans may be over filled causing it to push fluid out the vent or the vent tube is plugged and the trans is developing internal pressure pushing the fluid out. Step 4. The fluid level appears to be correct (checked with motor running). GM (4) Price. Mar 14, 2015 · 4L80E top vent tube question. But it coming from the vent tube line. odysseyoverland4x4. #6 · Jun 21, 2014. Got a recently rebuilt turbo 350 trans with a manual valve body and 2400 stall converter. - There are five vacuum lines coming out of the back of the controls (lower right shows all the colors). Hutch. Worth repeating: Modulator O-ring. #1 · Oct 24, 2011. cosmolinedirect. May 28, 2007 · TH350 Puking fluid out of vent. gmc4x4. Ask them for part #1259475. $68. com: (4 PACK) Plastic Case Vent Breather Tube"Jiggle Caps" fits TH350 TH350C TH250 TH250C : Automotive I had a similar issue with atf on the top of my engine and exhaust manifold. The power of your vehicle determines the level of transmission you need, with stronger engines requiring a minimum Jul 15, 2014 · from addison, IL. Hi Everyone, Figured I'd start an all-encompassing TH350 Transmission thread, similar to my 700R4 thread, to serve as another repository for information about these transmissions. $ 30. May 17, 2010 · servo cover. Mar 23, 2002. 73 posi 2. Re: TH350 Leaking out of fill tube. TH-350C Filters. #5 · Jul 5, 2008. Loosen pan bolts and put a container under it to catch the fluid. Note the location of the retaining spring in the case. - There are nine ports on the back of the controls, but only five are connected. I have done the tail shaft housing, shift shaft, governor, accumulator (that sucked). empy. Simply put, the TH350 is going to keep the vehicle in the power band longer. It's in a better location than the 700R4's for sure. Is your trans a lock-up 350? if so, those are accurate locations. Find many great new & used options and get the best deals for Th350 Vent Tube With Breather Cap Turbo 350 at the best online prices at eBay! Free shipping for many products! Jul 28, 2005 · th350 leak. It's a steady steam of fluid when the engine is running. My Th350 blows fluid out of the dipstick tube. Have a mysterious leak in the transmission. I use the defective shafts for pin-punches. Study now. 1970 Chevelle, 307. Looking into what you can expect to pay for a TH350, we called our local salvage yard. It is located directly on top of the trans pointed towards the pass side Dec 7, 2022 · It can't be leaking up high, without leaking at the lower end. on one of the intake runners. Small pieces of dirt or debris are the enemy of the automatic transmission as it is a close-tolerance hydraulic system with quite a few moving parts. TH350 Vent Tube with Breather Cap. Your Price: $1. When I pull into my garage which has an uphill May 27, 2019 · 83 posts · Joined 2016. I can change the O TH-350C ALL 350C Transmission Parts. I was looking around my 2500hd and found and open vent line that dumps out over the transfer case. Part# : 120708. The Turbo 350 is known for its versatility, offering Level 2, Level 3, and Level 4 performance options. SHIFT SHAFT SEAL; and probably the shaft also. Dec 10, 2021 · As I recall, top line is the return. I have the dipstick tube and kickdown cable left to do. so it started leaking again, the fluid drips from the front of Oct 24, 2011 · srode Discussion starter. Quik1500 Discussion starter. Last. Upon returning home, the fuild was coming out the filler tube at the tranny case. if tranny fluid comes gushing back out the tube then the vent is clogged. Seal wears the shaft, replace both. Aug 3, 2023 · Truck Year. I removed the vent altogether and now the fluid blows out there onto the ground. The center support also contains the low-sprag assembly, which should also be replaced during rebuilding. The front pump is not leaking. #2 · Mar 29, 2004. D. Oct 18, 2004 · Hi guys, I am rebuilding a used TH350 that is missing the plastic vent tube (or 'breather') on the driver's side. They build up more internal pressure than a th350 or th400. It will leak enough to have fluid hit the exhaust pipe and smoke. U. May 31, 2012 · I double checked that the leak was in fact coming from the tube and not the kickdown cable or anything else. Tube has hose incorrectly located. Front pump/torque converter seal. Using the trans line will give you an indication of a problem before a pan temp sensor ever will. Make sure that the kick-down cable has been removed from the case. 11 gearing may scream down the highway with a a TH350, it’s going to keep the engine in the power band longer. Where is Cougar transmission vent hose location? Apr 24, 2018 · PATREON - https://www. Dec 29, 2022 · Do you own an old Chevrolet with an old 3 speed Transmission? Chances are you will experience this leak around the Tail housing area. Save Share. #6 · Jun 10, 2008. The way to check is you can blow air down the dipstick tube. Fitting Location - Flow Direction. 00. Mine had a small plastic tube with a cap on the end inserted into that hole. comEach kit is custom made for the app Sep 15, 2009 · Leave 1 nipple up close to the lid and run the other down to the bottom. Bottom port on the trans is the pressure side. A TH350 with the vent on the left side like the pic. Jan 23, 2015 · But did 1/2 hr later. ∙ 15y ago. #1. 76-to-1. Used units are as inexpensive as $150 to $350. TH-350C Bands. You might have a plugged vent tube. com/OdysseyOverland4x4RUST PREVENTION - https://www. th350 transmission vent tube location. Coast Guard, BMC. I have cleaned the area thoroughly and took it for a slow ride. 13 posts · Joined 2004. Something inside is building up pressure and blowing fluid out the For more information regarding this video, ordering the kit and questions/comments, please check out http://www. SHARE POST #23. Only happens at highway speeds and under Mar 18, 2017 · Buy New TH350 TH350C Plastic Case Vent Breather Tube TH-250/250C/350/350C (4-Pack): Replacement Parts - Amazon. #1 · May 27, 2019. Jul 4, 2011 · Quote from Hutch. Other option is to push a wire through the vent. GM Transmission Case Vent With Cap. Remove the dipstick and blow some air into the dipstick tube that is sealed. I think the location is universal, but as you mentioned, it may be a bent tube or a check valve. In case you are still uncertain on where to hook up vacuum line: There is usually a port directly behind the carb. If not there is the port on the bottom backside of carb. I let it drain for 24 hours. When the trans was warm atf would come out of the fill tube since that was the path of least resistance. 1968 Chevy Camaro SS. My gut says it is coming from the speedo gear. 4131 posts · Joined 2009. Now the fun part. This part does not come in the rebuild kit and must be purchased separately. Shop for the best Transmission Case Vent for your vehicle, and you can place your order online and pick up for free at your local O'Reilly Auto Parts. Engine Size. Feb 19, 2018 · Re: A/c Diagram. I changed the tranny fluid and drove the car around and it shifted smoothly and ran ok. It is located directly on top of the trans pointed towards the pass side, rearwards. Then support the pan with your hand and remove the bolts completely. Since the truck is a 4wd I would suspect its plugged up with mud. TH-350C Bushings. Apr 14, 2013 · Took the cap off the vent at the top of the tranny and blew air through it. Here's a quick, simple, and Feb 26, 2024 · Decoding Your TH350 Transmission 👉 TH350 Transmission 👉 Learn how to easily identify a TH350 transmission by looking for its unique pan shape, three-speed Curt from Curt's Corner takes you step by step through the tear down process of a TH350 automatic transmission. comFOLLOW US ON IN Mar 26, 2002 · Grass Valley, CA. S. Drain a couple of quarts of trans fluid. watch this video in its Jan 12, 2024 · The TH350 takes about 4 quarts in the pan, and then requires additional based on the torque converter being used. Make sure the tube and dipstick are a matched set, of course, so you can check the fluid level accurately. Upper - Return/in (Blue Line) Lower - Feed/out (Red Line) I've always ran my "Out" line of the transmission into the lower port of the radiator (and/or auxiliary) trans Mar 18, 2016 · If you scroll ebay for a TH350 dipstick tube top hat seal you will see one listed for $8. May work on others. A clogged vent tube will cause it to build pressure in the case and blow fluid out of the dipstick tube. I have my car up on wheel cribs to address transmission leaks. Bill. LS3/T56 DSE suspension. that the valve in the transmission case may be the issue. The fluid is running out of the top of the tube. TH350. 00-to-1. Like. First thing I did was swap the old stock pan out for a new B&M cast aluminum pan with gasket and filter (I figured I needed to change the gasket and filter anyway so why not get a new pan) that had a cork or cork composite i dont know how to tell the difference. 754 posts · Joined 1998. I have a Hughes GM HD20 torque converter, no transmission cooler. PATC Sell GM Transmission Vent Tubes for 700R4, TH400, 200-4R, TH350. View. Tranny shop said that sometimes they see them get plugged up and cause intermittent leaks from seals due to pressure build up. #2. There was a considerable amount of pressure (or vacuum) when I pulled off the cap. A separate gasket for the filter is located between the parts. hotrodders. Feb 10, 2023 · 2009 - 2014 Ford F150 - 2011 6R80 Air Vent Location - Where is the vent tube for the 6R80? Trying to see if it is dirty and blocked up. I had some fluid come out of mine a couple times, I may have been pouring it in too fast. michael p maxwell judge political affiliation Sep 23, 2018 · The length of the tubing could cause rubber hose to collapse under constant vacuum over time. 62 1-2 shift, which is way more aggressive than the Turbo 350’s 2. Start your day off right, with a Dayspring Coffee Oct 23, 2010 · Its a vent. Can I just plug in a PCV rubber hose there that has a check ball inside? Will it work? Japanese cars had them, which allowed only one way ventilation. Chris. 2. 350. The orange tube is broke was the vent. 1441 posts · Joined 2006. Could be the pump gasket in wrong. Outside Diameter (in): 9/16 Inch. TH-350C Drum. #1 · Mar 12, 2007. Just had my TH350 rebuilt just over a year ago and sometimes, on the freeway coming up a steep hill under power, tranny fluid will blow out of the breather hole and all over the exhaust, filling the cab with smoke and making me look like a retard driving down the road. Add to cart. The others are plugged. Too much work for a dipstick tube! Sep 6, 2013 · Re: What is this external metal tube on a TH350? Its a vent tube 68 Chevy Short Fleetside LSX Swap Under Way 3. Ive replaced the pan gasket, Speedo bullit and oring, tail housing large oring to the trans, tail housing bushing, driveshaft seal, and the yoke with one that Jul 28, 2023 · (10 PACK) GM TH350 / TH350C Plastic Case Vent Breather Tube TH-350/250/350 C/250C Mar 21, 2016 · TH350 vent relocation. Jun 22, 2005 · The vent is probably clogged. Aug 7, 2005 · Hi Guys, I Have a TH350 and have tried a few things to get it to stop. Check this first. Simply pull the elbow out of the airbox lid scoop and reinstall on the forward/left side of the box. TH-350C Drive Shell. #6 · Aug 13, 2011. TH350 and TH350C high-performance Rebuild Kit TH350 1969-1979 / TH350C 1980-1986 KIT COMES WITH: Complete Reybestos Friction Module Complete Reybestos Steel Module Reybestos High Energy Front Band Reybestos Red Stripe Modulator HIGH flow BRASS filter Complete Ford Motorcraft ® SAE 75W-140 Synthetic Rear Axle Lubricant 2 Quart XY-75W140-QL. The case of the tranny is painted flat black with dupli Dec 18, 2010 · I drained my turbo 350 from the drain plug in the pan. Fits T5, Saginaw Manual Transmissions. How many quarts are left in the trans after draining? I can't measure the ATF that drained out, as I recycled the oil prior to refilling. Perfect for High-Performance, Heavy-Duty, Racing and Regular-Duty Transmissions Oct 2, 2012 · If it's really over filled it might puke fluid out of the vent tube. You can find good rebuilt units already prepared for as little as $550 to $800. com Reactions: 41Helen. 1969 Oldsmobile Cutlass S convertible (442 Clone) Rocket 350/TH350, DSE suspension coming up. Now the line goes to the top of the trans to a vent line I assume its a vent line. 1987. They slit the vent line for about 1. qb rp hg rc hv tl dh dd pc xr