Th350 Leaking From Vent

For example, your TH350 becomes a six-speed (First, First/Over, Second, Second/Over, Third, Third/Over). I have a tranny temp gauge,the sender is in the b&m deep aluminum pan and usually stays around 130 degrees. PATC GM Performance Transmissions, TH400, TH350, 700R4, 4L60E, 4L80E, 6L80E, 200-4R and others. Burning Smell or Smoke. warm it up without revving the snot out of it to make sure the converter gets filled form storage. Just a quick update on a few things I've been working on. Oil Pump Assembly. Hey J Just rebuilt a TH400 for my project sounds like low oil pressure to me I am no expert but thats the common thing between all the symptoms you can get to the pressure relief valve with the pan removed, worst case the pump is worn out. maybe the leak problem is not the pan. Whitley County Indiana | Spain Girona | Page County Virginia | Pinellas County Florida | Beaver County Oklahoma | Hancock County Indiana | Meade County Kansas | Payne County Oklahoma | Floyd County Texas | Australia Gladstone–Tannum Sands | Benton County Iowa | Sweden Kinda | Netherlands Sittard-Geleen | Douglas County Wisconsin | Sheridan County Montana | Napa. The fluid is at the correct level, but when running the car, the fluid will rise and pour out from the top of the trans filler tube. I have a '96 5. Drill New Vent Location Just under upper lefthand rear extention housing bolt. #3 Most big power guys have to do this. ) was used between 1968-'86 in RWD and 4WD GM domestic vehicles. Filler Tube and Seal. With the engine idling in park, vehicle supported safely, pull off the hose at rear of the modulator. i mean that the bolt that holds the filter on can only go so tight by the way the bolt is made. Below you will find Date coding information to determing the exact parameters of your transmission. I thought of using a check valve, but didn't want to say anything, because I had no idea if it would work or not. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. When you increase line pressure, a common occurence with the trimatic's is they leak out the small plastic breather on the drivers side of the box. Find 350 Chevrolet Transmission on sale here with the largest option of 350 Chevrolet Transmission anywhere online. Last time I'm listening to my dad when it comes to anything that has to do with the truck haha Posted via Mobile Device. This industry leading productivity enhancing tool provides your shop with the most current technical repair information, TSB's, repair procedures wiring diagrams, factory recalls, maintenance schedules and much more. But once you take away whats not wrong with the car the majority of the time the problem ends up being decently simple to repair. Most people understand the fact that leaking fluid is the first sign of a problem and typically equate the issue to something that is going to cost them a ton of money. does anyone know if the filter in a turbo 400 kind of floats. when you put it in drive it will not even go into 2nd gear or third. All necessary parts are easily available from many aftermarket transmission retailers. The TH350 was still produced many years beyond 1986 for export sales. Is this a normal leak if. The biggest problem with the vacuum system in any motor is LEAKS!. The representatives from Gearstar, ATI and TCI all agreed that many of the same issues, like those found in the TH350 and TH400 transmissions, can affect the performance of the 700R4. What Happens If You Overfill Transmission Fluid? Overfilling an automatic transmission causes the fluid to foam, leading to erratic gear shifting, oil starvation and transmission damage. What do I do now?. Vent Window Seals; Windshield Seals; Home / INTERIOR / Dash Components / Steering Columns & Parts. when you put it in drive it will not even go into 2nd gear or third. Third, the locking mechanism on the dipstick handle (some GM products) may not be functioning properly. From there, the water is flushed out of your home through a drain pipe/line. All of our contact numbers are available on our Contact Page. 200 Million used auto parts instantly searchable. No, its definately not the most defective transmission on the road. TH350 spewing fluid. The leaking was a couple drips constantly, not too fast at all. Glad to be of help. Have a Turbo 350 AT with a GM NP205 and home made clocking plate. Just don't want to kill trans with wrong level. Nova trans leak update, clogged vent tube, carb fixes itself. The Deluxe Cab came with vent-wing windows, driver armrest, dual visors, dual wipers, a dome light, and a headliner. Though not a fan of standard ignition, Id say it works crudely and perhaps primitive by todays standards, (no pun intended) though a couple of easy to replace parts in any tool box, would get you back on the road fairly quick. Remember a 1st Gen Monte does not leak!, It is just marking it's territory!. The recession, which had been caused in part by the 1973 oil crisis, had caused gas prices to soar which, in turn, had made automotive manufacturers begin re-evaluating the types of vehicles they were manufacturing. Transmission leaks at breather Honda CR-V 98?. This way, if you find signs that the hoses are cracked or leaking or the clamps look rusty, you can change them before refilling the radiator. i know someone wrote in on this. What is the cause? Did it come off of something?. TH350 spewing fluid. Check your vacuum modulator line. just as the weather got warmer i went to fire it to take it out for a ride and i find trans fluid all over the garage floor. It is widely considered to be one of the greatest of automatic transmissions ever built. Drag Race TH350 6" Tailshaft Forward Shift Pattern Full Manual Non Lock-Up w/ Stock Drum & HD Sprag Assembly (Chevrolet V8 & 4. When it came time to find out what the common formalities are with this transmission, both mentioned the "late shift" issue. It would pukke out of the vent even when it was a quart low. For 46 vehicles, the 7,500-pound Braeden MU-2 PTO winch would head the list. Shop our large selection of parts based on brand, price, description, and location. Simply slip the sleeve over your hose or line, cut to length and secure w ith clamp. Re: TH350 Transmission problems with shifting by rogal_tx on Wed Aug 17, 2011 8:42 am Surprisingly enough vacuum line modulator was a problem to shifting, replaced it and shifts good,(so no manual valve body) but I'm still fighting the leak. Questions? Comments? Drop us a line at:: [email protected] Thank you Monster Transmission. I didn't want to be responsible for a bad tranny. What are the typical causes of oil leaking (puking) out of a transmission? A. he can origin elsewhere and flow up to pan join. I've been fighting with this ever since I did an engine swap. Simply slip the sleeve over your hose or line, cut to length and secure w ith clamp. VB cross leak blowing out into oil, therefore foaming the oil. Starts, runs, drives. TH350 spewing fluid. However, the 4-speed automatic uses a throttle-valve (TV) cable as opposed to using a modulator to sense engine load like that found in the TH350 and TH400. In some cases, faulty installation within the transmission system pan can cause leaking. The vehicle in this video has a leak in the front main seal of the automatic transmission. Shift quality can be affected, especially if the fluid level is high enough to get aerated by the moving geartrain parts. Have a Turbo 350 AT with a GM NP205 and home made clocking plate. Glad to be of help. maybe the leak problem is not the pan. First i thought it was the heater core so i bypassed it. At the engine while its separate. The Ford C4 is a three-speed, medium-duty automatic transmission introduced on 1964 model year vehicles and produced through 1981. This thing was leaking pretty bad. Get the job done with the right part, at the right price. From replacement fuel bowls to power valves and jets and everything thing in between. The right steps during this procedure can save your engine, your bank account, and ultimately your sanity. 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. 1981 z28 camaro 85k miles all original no major modification made 3rd owner for 10 years garage kept ac blows cold starts right up you can daily drive this car need the money for home renovations make me an offer you know you are stealing this car for this price please feel free to text or call 845-500-1241 will ship anywhere in the usa !!!make me a reasonable offer - you never know. Have Questions We Have 30 year of Experience Give Us a Call Today!. Has a very stout small block with a mild cam(was told it's a 383, never took it apart to verify) has 9qt flat bottom pan, dual 3" exhaust with thrush mufflers a few years ago as well as a new Holley 650 carb, new plugs and wires, and alternator. The dealer said that I have a slow gasket leak where the transfer case meets the transmission. this happend overnight, i have had issues on and off with it. The Dana 300 is found in 1980-1986 Jeep vehicles. If the vent is plugged, when the fluid gets hot and expands, the air is not expelled through the vent so the air pressure builds up and pushes the transmission fluid up the dipstick tube. Ford E-250 Transmission Fluid Leaks from the Front of the Transmission Bell Housing - 52 reports. TH350 with a shift kit Water on passenger floor mats Joined: Jul 2000 It directs a vacuum to open the vents, if there is a leak, then it won't open. most of those old 350s would drain back and leak around the dipstick grommet and on start. Transmission leaks at breather Honda CR-V 98?. this is my. Proper engine break-in procedure is critical. Diagnosing a transmission is the same as anything else; it often ends up being a process of elimination. Q: I just had my th350 transmission rebuily. There could be a grove on the shaft,or the seal was installed and someone forgot to put a little grease on the convertor snout and she burn out. I'll be back. Took the gas tank off again, drained it, cleared the filter and the pump. Pump gaskets blown on pressure or suction side. Or go to a Trans shop tell them that your parking on a hill and you would like to try to keep the tran fluid from leaking. Those vents are not going to leak water to the inside unless there is serious cancer/damage behind the nose. If the vent is plugged, when the fluid gets hot and expands, the air is not expelled through the vent so the air pressure builds up and pushes the transmission fluid up the dipstick tube. Inline Tube is the largest manufacturer of preformed replacement brake lines and fuel lines with an extensive catalog of award winning restoration parts. Leaking fluid will be red. 8 I will try to get some pics up later. Th400 Vent Tube Leak! and 9 in tranny to give me a total of 11 quarts. Heat dramatically reduces the life of ATF so you can't have too much cooler. With franchises conveniently located coast-to-coast, Mister Transmission is the largest chain of transmission and driveline repair specialists in Canada. The TH700R4 can also be used to replace the TH350 or TH400 units in ’60s and ’70s GM cars and trucks with minor changes to the crossmember, driveshaft length, and installation of an engine pressure switch to activate the electrical torque converter lock-up. Classic Industries offers a wide selection of 1977 Chevrolet Truck parts, including 1977 Chevrolet Truck interior parts and soft trim, 1977 Chevrolet Truck exterior sheet metal, 1977 Chevrolet Truck moldings, 1977 Chevrolet Truck emblems, 1977 Chevrolet Truck weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. Sonnax enhanced performance accumulator spring 77704S provides firmer 1-2 shifts for the enthusiast that appreciates quick, positive shift feel in GM 200-4R, 700R4 and 4L60E series units. Second, the transmission vent may be clogged with dirt. I got a new trans TH350 coan, with 8 inch converter it has manual reverse pattern VB, Made first run, got time slip and they radioed the girl in booth had small leak, ck leak didn't find any issue , was on full line on dipstick, Make 2nd run they shut me off leaking fluid, So get back to pit and find leaking out vent slighty, drain fluid out about 2 qt, Now on stick it shows low fluid but on. Transmission fluid spurting out the vent tube So my CUCV was not shifting well into the different gears. A new speedo housing leak stop kit for the GM TH350 Transmission, 1969 & up. most of those old 350s would drain back and leak around the dipstick grommet and on start. The dipstick tube is very near, or on some transmission at or below the fluid level. We will do our best to get you the lowest price around!. 7) Check idle solenoid, especially for power/ground, replace solenoid if necessary. Anyway, thanks for the welcome. Faulty Installation. The leaking was a couple drips constantly, not too fast at all. Save on Dorman - Help Dipstick Tube Rubber Grommet 65113 at Advance Auto Parts. Visually inspect areas where parts meet like the oil pan, the area around the pump and torque converter and the extension housing. The recession, which had been caused in part by the 1973 oil crisis, had caused gas prices to soar which, in turn, had made automotive manufacturers begin re-evaluating the types of vehicles they were manufacturing. Trace the source immediately. The vent is probably clogged. Includes parts and tools necessary to repair venting and fluid leaking from vent on 5R110W with modifications to the pump. Clear it out and refill the trans fluid to proper level. If the transmission filter is not fitted properly, it could result in leakage. Classic Industries offers a wide selection of 1977 Chevrolet Truck parts, including 1977 Chevrolet Truck interior parts and soft trim, 1977 Chevrolet Truck exterior sheet metal, 1977 Chevrolet Truck moldings, 1977 Chevrolet Truck emblems, 1977 Chevrolet Truck weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. Bands were always the weak link. Yes its leaking between the engine and transmission. High Performance Circle Track and Oval Track Race Parts for Sprints, Late Models, Modifieds and Street Stocks. I have a TH350. GM TH350 Automatic Transmission. Before we got it back on the road, the fuel pump went out, after replacing the fuel pump, thought the rubber grommet was leaking at the transmission, replaced it. We have been adding products as we have the chance to. The Fordomatic was leaking everywhere and I was going to have to remove it for repair. On the driver side there is a shaft (linkage) that comes into transmission which shifts gears (from P do D etc. Google search may give you a more detailed and better understanding. Faulty Installation. Replace these before the front pump seal and your problem will probably be reduced or eliminated. They also educated me on correct type of filter to use. I changed the gasket twice and then installed a new transmission pan and still had the same leak. This is an excellent kit to have on hand when you notice a small leak. Why would transmission fluid leak from dipstick. When the front pump bushing is well worn, air will leak past the front seal letting the oil in the converter leak back into the oil pan and fill up till where it can leak out around the fill pipe seal. We may take a bit longer to respond on weekends. Transmissions often leak from a loose pan, caused when bolts aren't properly tightened after a filter is changed. Where is the breather vent on a th350 transmission? Why would transmission fluid be leaking from the breather tube? the A/T vents are on top of the tranny, and go to a high water vent tube. Buy online, pick up in-store in 30 minutes. Find 700r4 in Canada | Visit Kijiji Classifieds to buy, sell, or trade almost anything! New and used items, cars, real estate, jobs, services, vacation rentals and more virtually anywhere in Regina Area. The Turbo 350 was known as a durable transmission and was used extensively by GM. i mean that the bolt that holds the filter on can only go so tight by the way the bolt is made. Can you tell me how much it will. It has no overflow. I definitely recommend a look at these transmissions, you've got to have a look. Mine was the torque converter. TH350 leaking fluid out vent hole No driveshafts are hooked up so I moved the shifter and sure enough everything works. When you increase line pressure, a common occurence with the trimatic's is they leak out the small plastic breather on the drivers side of the box. We appreciate your interest in our item. Visually inspect areas where parts meet like the oil pan, the area around the pump and torque converter and the extension housing. The easiest remedy is to fit a line with an open end breather to it, this will solve your problem. 1998-’99 – There was one small, but important change made to the block in ’98. Fordomatic to C4 Conversion (57 TBird): Jeff Hallam. Skip to content CSI Automotive Sales, Service & Parts. I have a '96 5. If the transmission was building up pressure it wold vent out of the top of the case though the small tube at the top of the case, unless it wass plugged up. Includes parts and tools necessary to repair venting and fluid leaking from vent on 5R110W with modifications to the pump. could also be the big pump seal. For TH350 and. This is an excellent kit to have on hand when you notice a small leak. The vent is probably clogged. Add to cart. A new speedo housing leak stop kit for the GM TH350 Transmission, 1969 & up. Faulty Installation. Year 62-73 PG Pump Bolt Washers (7). Your fuel tank is damaged or leaking? If so, this is the direct replacement that will fit perfectly. Found a lower price from a competitor?. Ford E-250 Transmission Fluid Leaks from the Front of the Transmission Bell Housing - 52 reports. Find Dorman Automatic Transmission Vent Tubes with TH350 Transmission Type and get Free Shipping on Orders Over $99 at Summit Racing!. Like a lot of young men of his era, he was fascinated and passionate about cars, playing with toy cars in the dirt as a kid and usually being just on the fringe of getting a really cool car while working and raising six kids over a 40-year career. well first of all i have a b&m shifter in it and you can change gears by hand or you can put it in drive and shift gears. The second generation of Corvettes, produced from 1963 to 1967, are known as Stingrays or "mid-years. GM was feeling the pressure to produce more fuel efficient cars from both the government and consumers, the latter were just starting to discover the reliability and fuel savings that Japanese auto makers were offering. When rebuilding the C4 the o/haul kit contains new o-rings for both. the vent in the end of the rubber hose was not clamped. My fluid level is correct, however the dipstick could be wrong as suggested I just go by the hash marks. When the air is pulled in, condensation drips from the AC coils to what’s called a drip pan. Active Alberta title. So, I own a 1978 Camaro LT edition. Find Automatic Transmission Vent Tubes and get Free Shipping on Orders Over $99 at Summit Racing!. This also gives the ability for quick and easy lock\/unlock of dipstick to leave main dipstick with car when pulling transmission from car. These washers should be replaced anytime the pump has been removed. You are looking at a '75 GMC 2500 (aka, Chevy G20) 3/4 ton van that was converted to a camper van back in the day, by Futura Industries, out of Gardena, CA. Connect With Us. Speedo Adapter and Seal. Attaching the new cable and housing to the switch proved a challenge. It appears that one line is supposed to come out of the tranny and split for both a vent and an overflow. The easiest remedy is to fit a line with an open end breather to it, this will solve your problem. 73 rear axle (hwy gears). Either clogs or leaks will make the oil cooler less effective at cooling the transmission fluid. Find 350 Chevrolet Transmission on sale here with the largest option of 350 Chevrolet Transmission anywhere online. Welcome To The Turbo Forums. From the blog. when you run the thing, it seems fine but when you shut the engine off, the transmission pukes oil out of the dipstick and the oil cooler seems to buzz and make popping noises when the engine is shut off. Drill 11/32" hole 5/16"forward of the extension housing mating surface. Also make sure that little vent tube on the top of the trans did not get plugged by some furry little critter like a mouse or some of those mud flies it will puke if the vent is plugged. NAPA is your trusted source for automotive parts, accessories & know how for your car, truck or SUV. Otherwise, the most common problem will be fluid leaking out the vent. SARBS Pump Maintenance Seminar, June 7, 2012 Sealing Systems For PumpsSealing Systems For Pumps Part I Presented by: Shelby ScottShelby Scott Western Region. The fluid expands and comes out the vent, gets on the hot exhaust, and starts a fire. Hey J Just rebuilt a TH400 for my project sounds like low oil pressure to me I am no expert but thats the common thing between all the symptoms you can get to the pressure relief valve with the pan removed, worst case the pump is worn out. krusher wrote:i got another 350 turbo behind my 350 V8 in my 98 Sonoma. In addition, leaks can come from a defect to the transmission itself; generally, from a cracked, dislodged, or misaligned seal or gasket. Newbie here, been a lurker for awhile but i couldn't find any info on this problem. The second line is a vent for the transfer case. Before you swap o-rings, just wait and see if it will stop leaking. This involves a process of elimination, usually starting from the simple, easy-to-check items, then moving on to more difficult items in logical sequence. A 1970 Chevy automatic runs fine, except for trans fluis leaking. Well low and behold it is not leaking now. If it leaks, replace it. Too much oil. I ended up using a 90 degree hook from a Harbor Freight hook and pick set (1$) to release the locking mechanism. I think it's a vent for the transmission and just runs over the transfer case. I'll be back. What are symptoms of a worn tranny modulator valve? Generally, the tranny shifts smoothly when it is stressed during harder acceleration, but on slower, more gradual acceleration, the shifts would be rougher (particularly first and last gears, and last gear would even clunk when not stressed). The way to check is you can blow air down the dipstick tube. Crank Case/ Valve Cover Vent. Buy online, pick up in-store in 30 minutes. We will do our best to get you the lowest price around!. Third, the locking mechanism on the dipstick handle (some GM products) may not be functioning properly. TH350 Selector Shaft seal replacement. It now has prob 10 quarts in it after taking some out and it still is leaking from the vent. The tranny seal can also be done in car with the driveshaft out, just pop the seal out with a screwdriver and tap new one in with a large socket and hammer. GM had a kit that included a piece of rubber extension hose with a plastic tie to secure it away from the exhaust system. DON'T hook up the tank vent to the manifold or pcv--all you will end up with is a bad running engine (vac. I replaced cable because that was the only way to get the seal inside speedometer cable. Drill New Vent Location Just under upper lefthand rear extention housing bolt. On my trans tunnel it is a close fit, but there may be enough room on yours. i have a new pan gasket so that leak is fixed. articles, project cars, conversations, and more. Anyway, thanks for the welcome. there was no leaking on to the ground. Too much oil; B. What are the typical causes of oil leaking (puking) out of a transmission? A. Second, the transmission vent may be clogged with dirt. Certainly makes for a more robust transmission. The leaking liner is located into the front on the transfer gear to the low engine coolant excessive unit are typically even as electricity in speeds in front of the ignition this is present when you reach a crankshaft light in a 1 engine a fine string to only be able to flush the rag through a connecting rod. Transmission fluid spurting out the vent tube So my CUCV was not shifting well into the different gears. Simply slip the sleeve over your hose or line, cut to length and secure w ith clamp. so while engine is running everything is fine but when i cut the engine off its starts puking transmission fluid out the dipstick, about 2 quarts. probably out the vent. ~jerryzhu pub wish pdf - cached - similar auto insurance quotes nh Whereas geico did not specify the services collection this business was removed from the services 28 Don't really take you about the same as this is an exception, however, and can not find one Sound business insurance specialists who are to match the xf Value of… your vehicle must wear seat belts is marginally safer than ever. You have no items in your shopping cart. This Tech Section has grown rather long and takes too much time to load. Gotta open up the spare tire cubby behind the seats and check the floor from the top. Common Customer Problems With The Ford E4OD Transmission. This thing was leaking pretty bad. Why would transmission fluid leak from dipstick. Have a Turbo 350 AT with a GM NP205 and home made clocking plate. The dipstick tube is very near, or on some transmission at or below the fluid level. I drive this one every day, it beats the hell out of being stuck in a Camry. Overfilling a manual transmission causes the fluid to leak from the vent and the gear trains to slow down when the clutch is depressed, leading to gear. During runaway, the diesel engine is not running on diesel, but on engine-oil leaking into the cylinder, often through the air-intake. Ive driven many late model high-end luxury cars and there is no more comfortable car on the road. 6L80E Transmission, Quality rebuilt at New lower price. if tranny fluid comes gushing back out the tube then the vent is clogged. Why is this? No engine code comes up when I run the obd 2 on it. We will do our best to get you the lowest price around!. Re: TH400 Leaking ATF Out of Vent Hose On Bellhousing! Please help! Well when that happened to my Firebird. what the hey? Fluid doesn't seem to be leaking from the pan or the back of the slip yoke area. Leaking transmission fluid is one of the easiest ways to determine your car needs attention. Vacuum Modulator. turbo 350 lock-up blowing fluid out of dipstick tube it is a turbo 350 lock-up with no wiring hooked up,and it only - Chevrolet 1985 K1500 question. The vehicle in this video has a leak in the front main seal of the automatic transmission. Performance – 10. Overheated, aerated or overfilled fluid levels will result in fluid leaking from the transmission vent. Fits 2003-2012 Ford 5R110W. The Best Resource for Chevrolet Corvette News, Rumors, and Owner Information. You're viewing: VENT TUBE, TH350 / TH400 WITH BREATHER CAP (PLASTIC) 69-UP $ 3. Tried it again and it's still leaking oil onto the top of the fuel pump but it is old black dirty engine oil from before I changed it. I drained my turbo 350 from the drain plug in the pan. this happend overnight, i have had issues on and off with it. this is my. It's crucial when diagnosing a transmission pump or a torque converter. th350 leaks fluid into np 205. Starts, runs, drives. Too much oil; B. A worn Out modulator Valve can eventually start Burning transmission Fluid Toyota parts center. The cause of this problem is the upper channel plate gasket. I also noticed that there was quite a bit of fluid all over the underside of the truck. Why would transmission fluid leak from dipstick. We have 6L80E Transmissions in stock and free shipping. Corvette: How to Change Transmission Fluid. 2005 Ford E-Series Van atf blowing out vent tube. Hi, I've got 1973 Malibu with auto TH350 and I got leak that I can't find solution for it. Remember, the TH350 hasn't been new since 1980. TH350 with a shift kit Water on passenger floor mats Joined: Jul 2000 It directs a vacuum to open the vents, if there is a leak, then it won't open. It seems to leak a bunch of transmission fluid after setting for a period of time. Long - Black Finish LOKAR - ANCHOR TIGHT LOCKING FLEXIBLE TRANSMISSION DIPSTICK P/N X1211147-36 FEATURES: No Filler Tube Needed Eliminates Expulsion Of Dipstick Handle Bolted In Sealed Pan Fitting Accepts Standard Transmission Funnels Made From 6061-T6 Aluminum No Pan Fit. It's crucial when diagnosing a transmission pump or a torque converter. Found a lower price from a competitor?. I switched it from the 305 to a 350(355). The dipstick tube is a very common leak place. we dropped the pan today and there was a little bit of. If they weren't used then that would be the first place to look. personnally I already haved probleme like your and the leak was , the pump bolt seal !. 400 transmission parts TH400 transmission rebuild kits TH400 transmission shift kit Sonnax boost valve Lubegard additives Transgo performance shift kit. If the transmission filter is not fitted properly, it could result in leakage. Problem CONDITION POSSIBLE CAUSE CORRECTION 7) Idle cut-off solenoid not working. MOD02 BANDS 500D Intermediate Overrun (Front) 64-98 1 TH400. Have a Turbo 350 AT with a GM NP205 and home made clocking plate. The fluid is at the correct level, but when running the car, the fluid will rise and pour out from the top of the trans filler tube. Drill New Vent Location Just under upper lefthand rear extention housing bolt. Author I've noticed that after accelerating fast my TH350 loses fluid out the filler tube. Please excuse us while we're in the process of building our new web store. I got a new trans TH350 coan, with 8 inch converter it has manual reverse pattern VB, Made first run, got time slip and they radioed the girl in booth had small leak, ck leak didn't find any issue , was on full line on dipstick, Make 2nd run they shut me off leaking fluid, So get back to pit and find leaking out vent slighty, drain fluid out about 2 qt, Now on stick it shows low fluid but on. Once again till next order thank you very much Cheers, Ralph. 1974 C3 Corvette 1974 Corvette Overview. Fluid will come out the vent if the transmission is overfilled or if the trans fluid overheats. You'll always find the best replacement parts, aftermarket accessories for cars, trucks and SUVs online or In-store. Though not a fan of standard ignition, Id say it works crudely and perhaps primitive by todays standards, (no pun intended) though a couple of easy to replace parts in any tool box, would get you back on the road fairly quick. At the engine while its separate. Complimentary Computer Diagnostics; Free Local Towing with repair 24/7 within 50mi. TRANSMISSION LEAKING. For A Bodies Only Mopar Forum. well i have two problems 1. Napa County California. No big issues yet, everything looks fixable. I'd like to flush the transmission fluid but I'm already scratching my head at the process. This allows the fluid level to go above the selector shaft seal and the speedometer input seal. I switched it from the 305 to a 350(355). No, its definately not the most defective transmission on the road. The 4L60E is a four-speed automatic overdrive transmission designed and built by General Motors. If the modulator was leaking internally and defective it would result in transmission fluid being sucked into the engine and burning. That code is now gone but the fluid is still leaking out of the vent tube. Found a lower price from a competitor?. General Motors • Honda/Acura • Hummer • Isuzu • Jatco CVT • Kia • Mazda • Mercedes • Mitsubishi/Hyundai • Nissan/Infiniti-Jatco • Saab • Saturn • Subaru • Suzuki • Toyota/Lexus • Volvo • ZF • NEW PRODUCTS • UPGRADED PRODUCTS • TECH PUBLICATIONS. Locking nut and seal helps seal up dipstick from leaking at case. Here is what I have observed:. Newbie here, been a lurker for awhile but i couldn't find any info on this problem.