Th350 Front Seal Leaking


I have rebuilt a lot of Turbo 350 / 400 transmissions of the years and the first piece I replace is the front pump. 1964 to 1974 models were assembled with iron hook type rings. Th350 Cover. The other place it may be coming from is the trany pan. Seals on your transmission are exposed to high temperatures while the vehicle operates, so they experience a huge amount of wear and tear. Slide yoke onto front output shaft and torque lock nut to 90-130 ft-lbs. Start with the clean flat washer, next to the washer is the seal. TURBO HYDRAMATIC 250, 250C, 350, 350C 3 SPEED RWD (Lock Up & Non Lock Up) Revision 02/2018. If the transmission filter is not fitted properly, it could result in leakage. That's one of the hardest leaks to fix and we'll deal with how to do it, but many leaks appear to be from the rear main seal and actually aren't. This shaft sticks out about 1 inch past the case. No pics of that one though. * Applies to all purchases made on MatcoTools. Never thought a leak like this was a reason to change a transmission. If it doesn't start leaking. What she ^ said. I rebuilt my 700r4 and had a leak at the rear seal. These shafts where hard to find until now. I call a transmission shop the guy says it is probably a spun bushing, not a seal and probably needs a new transmission. Best Answer: that piece that covers the torque converter is the inspection place and if transmission fluid is laying in it then the front seal or front pump is leaking ! if the tube is clogged it can make the front seal, the back seal or a gasket to leak. my napa friend said his was a FREEZE plug leaking. I have a th350 paired with a np205, i think i may have transmission fluid leaking into my transfer case, i have been told i need to pull the tranny and transfer case out of the vehicle to repair this. I,m assumeing it,s the front seal as the lines are all good. There are two main types of oil seal: static and. This seal is located at the front of the crankshaft as it protrudes out of the front of the engine block. Get the job done with the right part, at the right price. You will be missed, Neil! Posts: 19171 Location: bishop, ca: Tim, when/if you buy a new (replacement) torque converter, you should have it be thoroughly checked and/or overhauled but, here's a real good tip: if your trannie is air-cooled (with air vent-grilles on the bell housing and with the T/Q having a row of small cooling ear/fins on. A front-wheel-drive car has oil seals on the drive shafts at the front wheels. See Figure 10A-5. One of its main components is the seals and gaskets that control the flow of hydraulic fluid and keeps it from leaking out onto other parts of the engine. Allstar Locking Trans Dipstick B. Its main purpose is to deliver power to the wheels so that the automobile can move. Get deals on automotive parts, truck parts and more. Well low and behold it is not leaking now. No problems at all. WILLIAMS October 31, 2015 at 3:58 am. Never thought a leak like this was a reason to change a transmission. kinda looks like it. The leak has really irritated me and I was tired of dealing with the puddle of trans fluid on the garage floor so five years later I started doing some research online and I found out that there is a well-known problem with the 700r4 front pump seal that was fixed in mid 1987, when the transmission was redesigned. Questions?? Send us a message through Ebay and we will respond ASAP. If you slide around the drum, and it catches the seal it will cut it and then you must get a new lip seal and start again. Transmission Pump Seal Official Site Toggle navigation Steamer. The front part of the crankshaft is where the balancer or dampener (same thing) is bolted too and is. A lot of people forget to do them - and some transmission shops aren't particularly careful about putting these seals in carefully on their rebuilds. When this happens the front seal must be replaced. This is a discussion on Transmission Tail shaft leaking within the General Help forums, part of the LSx Technical Help Section category; Took the car to cobblestone today for a transmission fluid flush, and they told me their was a leak in. Stroker ,if I read my old reciepts correctly the GM part # for the front seal retainer is # 8654491 group # looks like 4. Crankshaft Oil Seal Audi Vw Skoda:passat,a4,a6,a8,superb I 1,allroad 059103171d $77. The vehicle in this video has a leak in the front main seal of the automatic transmission. TH350 4WD short output shaft. put blue devil to help stop transmissions front seal from leaking but didn't work any other sealants that may work t - Chrysler 2001 Town & Country question. It is a durable part and seldom gives. all those seals basically look the same. i'm tracing a very strange oil leak. 727 could be seal or overheated trans and started blowing out vent in front right behind convertor roller dynos are very hard on convertor car and if guy running it is not that verst in it worst yet if it is a vent leak may want to move it to rear of trans and put catch can on it. I have had the selector seal leak on a 2004R. Each housing comes with all necessary seals for a leak-free installation. This site has searched all over a comprehensive assortment at competitive sticker prices. The filler tube seal is also a common cause of leaks. TURBO HYDRAMATIC 250, 250C, 350, 350C 3 SPEED RWD (Lock Up & Non Lock Up) Revision 02/2018. Hoping that bolts can just be tightened or something. What finally fixed it was a later model dipstick tube with the "tophat" gasket and a new kickdown cable with a new seal in it as well and a new pan gasket with plenty of silicon RTV. On the driver side there is a shaft (linkage) that comes into transmission which shifts gears (from P do D etc. tranny fluid leaking through thecenter of the tranny yoke! c/kman. TH350 4WD short output shaft. Loosened the bolt by bumping the starter with the breaker bar against the frame. What causes the transmission front seal to leak - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. End_elivehelp_btncod NEW TH350 Front Pump to Torque Converter Seal. Transmission Case, Extension Housing, Gasket and Seal. For TH350 transmissions, this housings is cast in heavy-duty aluminum and machined to keep the gear in place and accept your speedometer cable. I want the blue 1 piece Fel-pro oil pan gasket but they make a thin or a thick front seal type. The front main seal, located behind the timing gear on the crankshaft is the more likely culprit. We also it for its value for the dollar. The 700R4 is still leaking from behind the TC after I installed it the 85 in December, I put a new front seal in it then. Of course, it should be replaced any time the pinion gear is removed, such as ring and pinion replacement. It depends on the kind of transmission in many cases. put blue devil to help stop transmissions front seal from leaking but didn't work any other sealants that may work t - Chrysler 2001 Town & Country question. It works quickly and effectively in stopping all leaks in the transmission. Step 5: Use a small screwdriver to test for full movement of the modulator valve. Replacement bushing and seal fits GM Powerglide, Turbo 350, Saginaw, Muncie, Bert and Brinn transmissions. If you counted 13, you are either looking at the Turbo 350 Transmission or the Turbo 400. Rear Main Seal Leaks (Part 1) So you've got that embarrassing oil spot under your Chevelle and it's dripping off the flywheel dust cover. 904 or 727 904 could have broken convertor hub. I was wondering if there is a way to get the tube out without moving the motor from. Depending on front/rear seal and the type of transmission - you could be looking at $200 to $600, with 600 being for the front seal which is harder to replace. Hoping that bolts can just be tightened or something. I had a similar problem. You have to remove the driveshaft anyways to pull the differential input shaft, wood be foolish not to replace the trans tailshaft seal while you can get to it. For example, the two most common reasons for transmission fluid leakage are: 1) A worn or a broken seal can cause the transmission to leak. do a search here on FREEZE PLUG LEAKING. If you've got an oil seal leak in a very inconvenient place, then this video by Scotty Kilmer will show you how a little bottle of re-sealer may be able to fix that leak. Problem I’m having is the PG is leaking like crazy and it’s time to have it fixed, re-built, sealed or replaced. It's not too hard to replace the seal. Pace Performance offers the best pricing on products offered by TCI Transmission. Our TH350 to Dana 300 conversion makes for a very strong, and capable assembly both on-road and off-road. Oil Pump Assembly Pump to Case Gasket. Today we remove the front pump from a turbo th350 transmission, this transmission had a no pull problem after a new rebuild, so lets remove the pump and check their first for the problem. No big deal. Answer this question I have this problem too Subscribed to new answers. front seal leak. New power steering pump and new alternator. It works quickly and effectively in stopping all leaks in the transmission. i'm tracing a very strange oil leak. The Turbo 350 transmission, commonly known as the TH350, was a 3 speed automatic transmission that began phasing out the GM Powerglide in 1969. Online shopping for Automotive from a great selection of Wheel, Crankshafts, Automatic Transmission, Manual Transmission, Axle Shafts, Camshafts & more at everyday low prices. There is a small dent with scratches on the roof from the shipper from when I bought the car. If I go for a drive, get All this is especially true if the. Transmission Dipstick, Locking, Steel, Cadmium, TH350, Kit. This is why we see very few transmission pans leaking on vehicles that someone has not serviced. Scoring and scratches can be caused by gritty contamination getting in past a worn seal, or from using improper tools to remove an old seal. I have my turbo 350 out due to the front seal leaking, but I also have a muncie 4 speed that is available waiting for me to make a decision. Get the job done with the right part, at the right price. Often it is the front pump seal that causes large fluid leaks on th350s - it isn't the input shaft seal, it is around the front pump (roughly 6-8 inches in diameter). it is where the drive shaft enters the transmissuion. A second removal of the trans lead to replacement of the front pump. These leaks are hard to find since air movement under the car forces the fluid toward the back of the car while driving. The only issue of note was a rear main seal leak that turned into a MAW engine swap project that I had already been working towards anyhow. I have my turbo 350 out due to the front seal leaking, but I also have a muncie 4 speed that is available waiting for me to make a decision. 350 Transmission Parts. If I have pull it, I will throw a higher stall converter in. Seals- Front Pump - It is vital to make sure that nothing important in your transmission unit leaks out and causes the parts to become flooded, and that is where the TH350 seals come in. Specilaizing in Hydramatic transmissions. There is a seal where the cast iron pump sits in the case, this generally does not start leaking, it would be from the start if it leaks. These shafts where hard to find until now. It is widely considered to be one of the greatest of automatic transmissions ever built. This is an excellent kit to have on hand when you notice a small leak. Tried using the ratchet strap/chain to the frame method without luck. I figured out the leak occurred every time I added fluid. JEGS Performance Products 60303 Transmission Front Pump Seal Kit TH350 Includes: A-Team Performance GM 2771004x Hydro-Boost Repair Kit Seal Leak Repair Universal. park it, start the engine and let it idle warm, with your foot on the brake and parking brake engaged and no one in front or behind you move your shift lever from park to drive-n-reverse and back and listen to the sounds. com FREE DELIVERY possible on eligible purchases. a transaxle, be sure the equipment is properly cali-brated. 431 A C 69-86 1 TH350. front isn't front seal that's dry. So it's definitely something you want. 150A Front Pump Seal 64-98 1 TH350. Well low and behold it is not leaking now. A rear main seal will also leak into the converter cover. Skip to content. Opening up the front pump seal drainback hole to at least 5/16" to keep from blowing the front seal out. Each housing comes with all necessary seals for a leak-free installation. behind the converter you have the front seal and the pump !. I'm not a mechanic but am somewhat handy and simply don't have cash to dish out and don't believe (and hope it's not) a serious problem. All new parts. I was wondering if there is a way to get the tube out without moving the motor from. 50 T350 Front Rear Oil Seals Th350 Front Pump Seal Extenstion Output Turbo 350. The TH350 has a 13 bolt pan gasket. After re-assembling the trans a second time, now with a new converter, new front pump, all new seals, new clutchpacks and gaskets, and a replacement selenoid, the leak persists. 8) is very important. As a result of the cracked flexplate, eventually this will cause the front seal to leak due to pump bushing damage and converter hub wear. Manufacturers use several methods to seal the pan on their transmissions. Pull the transmission dust shield and inspect back toward the bolts (may have to use a mirror) where the input shaft enters the transmission. Governor Cover and Gasket. I have rebuilt th350's before and haven't needed to replace the bushing unless it looked bad. Remove the lock nut from the shaft and slide yoke off. I want to sell it and if it's an easy fix I wouldn't have to discount it because it leaks as it runs fine. Find the best value deals for Extension Seal Kit and save today. If the oil is leaking from the front seal you will need to remove the oil pan and replace both the front and rear seals and the rail gaskets. 50 T350 Front Rear Oil Seals Th350 Front Pump Seal Extenstion Output Turbo 350. I pulled the one from the Caddy for the second time and the trans shop guy took pity of me and fixed what was really wrong - the front pump has to come out and the converter/front pump bushing has to get fixed, then reassembly and a new front seal. I am working on a 72 C10 with a 307/350 turbo combination. I made a pulley holder from a piece of flat stock. I have a transmission fluid leak that I can't seem to fix. These shafts where hard to find until now. It is widely considered to be one of the greatest of automatic transmissions ever built. Also comes in handy when doing a rear differential rebuild. Yeah, you'll know the grommet is a better seal because it can be a pain in the arse to get the dipstick in. Stroker ,if I read my old reciepts correctly the GM part # for the front seal retainer is # 8654491 group # looks like 4. It would sit and lose a quart or so a week prior unless I drove it everyday. park it, start the engine and let it idle warm, with your foot on the brake and parking brake engaged and no one in front or behind you move your shift lever from park to drive-n-reverse and back and listen to the sounds. Cars & Trucks Motorcycles Other Vehicles & Trailers Boats Powersports Parts & Accessories Automotive Tools. Classic Industries offers a wide selection of Chevrolet Bel Air parts, including Chevrolet Bel Air interior parts and soft trim, Chevrolet Bel Air exterior sheet metal, Chevrolet Bel Air moldings, Chevrolet Bel Air emblems, Chevrolet Bel Air weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. When I get a new 400 to drop in my F/bird I'll do the seal. At the front of the engine there is a seal that designed to control oil from leaking out. Weird, right. It's possible that the front seal is shot, but I'm not sure about it leaking more in reverse. a transaxle, be sure the equipment is properly cali-brated. This video will show you how to repair this transmission leak at the seal. Th350 Front. Coat one side of the washer with grease before insertion and stick it to the seal. In this case we used a “print-o-seal” type of composition intake gasket which incorporates a special bead of sealant built tight into the gasket surfaces. Th350 transmission rebuild kits with seals TH350 transmission metal clad seals 4L30E OR ANY front wheel drive GM transmissions. Banner Kit: Same as Master Kit, but without Steel Clutches. TH350 leaking from the front? Solve the problem with our front pump leak sealing kit for the GM TH350 Transmission, 1969 & up. Ford E-250 Transmission Fluid Leaks from the Front of the Transmission Bell Housing - 53 reports. behind the converter you have the front seal and the pump !. The TH350 has a 13 bolt pan gasket. For example, the two most common reasons for transmission fluid leakage are: 1) A worn or a broken seal can cause the transmission to leak. New power steering pump and new alternator. The next most common leak sources are the selector seal, speedo seal and "O" ring. The number one source of dripping fluid when a car with a 350 transmission is parked for a period of time is the front pump "O" ring. I had a th350 that was leaking in a motorhome, and I took it to a local shop (stay away from the transmission chain shops like AAMCO - they will insist on an expensive rebuild) and had them replace the front pump seal, input seal, output seal and sector shaft seals for about $175 out the door. 456 gears front and rear. 8) is very important. When I first looked at the truck when purchasing it, I figured it was the output shaft or speedo gear seal. Replacing a Pinion Seal Replacement of the differential pinion seal on a Chevelle can be performaned by more than one method. Find our best fitting transmission seals for your vehicle and enjoy free next day delivery or same day pickup at a store near you!. Find Transmission Input Shaft Seals with TH350 Transmission Type and get Free Shipping on Orders Over $99 at Summit Racing! Transmission Seal, Front Pump, Rubber. Torque Converter Installation Instructions. Return Policy * 30-Day Risk FREE return for refund or replacement If you are not 100% satisfied with your returnable items, return the product for a refund. The thin is driver-side dipstick only and the thick is either. Just because you have a new one does not eliminate it as the source of the leak. Again, there is no leak at idle when hot or cold. LLV stands for the Grumman Long Life Vehicle, which the United States Postal Service (USPS) for all mail delivery. i figure by the time u hoist the engine up support it drop the k frame etc just pull it out. You may want to check your oil and transmission fluid levels prior, as that would be a pretty good indication as to where the leak was coming from. Proprietary materials, installation aids and proven technologies help ensure a reliable seal on even the most troublesome applications. 1948-1954 Buick - $80. Chevy 350 main bearing replacement procedure for these units to start leaking drastically than for the main seal to blow out. Yeah, you'll know the grommet is a better seal because it can be a pain in the arse to get the dipstick in. I am going to have my leaky oil pan gasket fixed this week. I had replaced the front and rear seals already. My th400 pan gasket leaks, how do I stop it? If I seal it up and fill it up, it does not leak. 50 T350 Front Rear Oil Seals Th350 Front Pump Seal Extenstion Output Turbo 350. I figured out the leak occurred every time I added fluid. Hoping that bolts can just be tightened or something. I am working on a 72 C10 with a 307/350 turbo combination. If the oil is leaking from the front seal you will need to remove the oil pan and replace both the front and rear seals and the rail gaskets. We are a leading Shaft Kit Transmission discounter, find a wide Shaft Kit Transmission deals for sale from Ebay. Seals on your transmission are exposed to high temperatures while the vehicle operates, so they experience a huge amount of wear and tear. Discussion in 'The Hokey Ass Message Board' started by evobuilder, Mar 9, 2013. my turbo 400 leaks right where the speedometer cable goes into the tail shaft. Is this the end of the Windstar? Not sure I wanna do another major overhaul. pump seal bushing front a4ld transmission o-ring 4r44e 5r55e kit gasket 4r55e 4r55e gasket kit pump o-ring 4r44e transmission seal 5r55e front bushing a4ld. your problem according to you is not that seal. Start with the clean flat washer, next to the washer is the seal. You can see how different it is compared with the TH350. Fluid leaks can result from many different causes, most commonly with faulty installation and broken seals. 350 Transmission Parts. How to seal a cooler line leak? 6 Answers. 1964 to 1974 models were assembled with iron hook type rings. For TH350 transmissions, this housings is cast in heavy-duty aluminum and machined to keep the gear in place and accept your speedometer cable. We provide a variety of Th350 Cover for your vehicle needs. The NP205 gear driven transfer case is considered by many to be the king of bulletproof. 50 T350 Front Rear Oil Seals Th350 Front Pump Seal Extenstion Output Turbo 350. This seal will stop the leak where your shifter linkage connects to the transmission. No pics of that one though. This thing was leaking pretty bad. Page 1 of 2 - Leaking Turbo 350 pan! - posted in Driveline: geeze the fun never stops, I changed the Pan Gasket and Rear Extension Housing on the T350 about 2-3 weeks ago = it was fine and didnt leak a drop, since then Ive taken the car out maybe 4 times. Sometimes oil from the EPC solenoid is being sprayed directly at the vent. There is only a couple things that can cause this, the housing or the speedo gear. You'll want to lube it up a little with some fresh fluid or a little grease. Sometimes oil from the EPC solenoid is being sprayed directly at the vent. My TH350 never stopped leaking, after I sealed the trans the lines to the tranny cooler started leaking :rolleyes:. Maybe I should look into an aux cooler! I would hate to pull the tranny to replace the front pump seal if it is ok. I am working on a 72 C10 with a 307/350 turbo combination. - Tail shaft (if it's leaking where the drive shaft goes into the car) - At the Torque converter could mean the front seal is busted. Transmission has a slow leak from the speedometer housing from a bad o-ring. Hoping that bolts can just be tightened or something. Originally posted by [email protected] 24 2010, 02:34 AM~18391108 this is tricky business so listen up your leak can come from hard lines, cracked tranny, warped pan, bad gasket seals on rear shaft or front shaft. Scoring and scratches can be caused by gritty contamination getting in past a worn seal, or from using improper tools to remove an old seal. I have a turbo 350 that is leaking from the front pump seal and thought I would ask on here what all I should do to fix the leak. Did you oil the TQ before you slide it in?. Manual Shift Th350 The TH350 is an automatic shift, three-speed transmission. TH350 Turbo 350 Transmission Pump Seal Extension Housing Seal Set, 100% Satisfaction Guaranteed for Transmission Pump Seal Extension Housing Seal Set. save on Transmission Pump Seal. Always check the transmission fluid's color because ATF will turn brown from heat and oxidation. I have a '77 Chevy Silverado PU and had the crank, (rod's, mains, pump, etc) replaced. new transmission about 40k miles ago. Well I just happen to have some pictures of a rear seal replacement that we did in my shop that might help shed some light on why it costs so much to replace. A common problem for buyers of output shaft seal replacement parts is that it tends to get damaged easily once the output shaft bearing leaks. Remember, fluids can move and travel around when driving and or sitting. I guess it's a front seal on the trans. The code is gone but the breather tube still spits out fluid. What would cause a front tranny seal to blow? over,there was plenty of tranny fluid leaking out. New power steering pump and new alternator. and a seal that is in the trans. Kits include front pump gasket, O-ring, metal clad seal, pump bushing and washers. How am I to know if I need a thin or a thick gasket? Thanks. How do you change the rear output shaft seal leaking at rear of transmission only when running. Now is the time to replace your worn or damaged front pump seal to prevent leaking. See Figure 10A-5. Ford E-250 Transmission Fluid Leaks from the Front of the Transmission Bell Housing - 53 reports. The process included replacing the critical seals (front and rear as I don't remember the names) so I never got leaks from those areas. Find many great new & used options and get the best deals for TH350 Rear Extension Tail Housing LEAK STOP SEAL KIT Turbo 350 Transmission at the best online prices at eBay!. WILLIAMS October 31, 2015 at 3:58 am. Subject: TH350 leak at driveshaft: Reply: Pull your driveshaft and check the tranny yoke to make sure it doesn't have any nicks, burrs, or anything else that could disrupt this seal. After talking to a local transmission shop, they thought the problem was the front pump bushing. When I get a new 400 to drop in my F/bird I'll do the seal. I have replaced the pan gasket and replaced the front seal but it still leaks. Find our best fitting transmission seals for your vehicle and enjoy free next day delivery or same day pickup at a store near you!. TH350 leaking from the front?. 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. Here's the step-by-step on adding a TH350 behind your big or small Chevy engine. Did you oil the TQ before you slide it in?. Only leaks about half the oil it used to so the new seals in the front helped out. OR08 METAL CLAD SEALS 150A Front Pump. High Quality selection of O Seals Rings and many other products. Also comes in handy when doing a rear differential rebuild. T56 Front Shift Conversion Kit relocates the shifter to the forward opening on the top of you 6 speed T56, 13. No pics of that one though. Is there anything else that might explain this leak back? Short of a rebuild, what are my options? If there isn't anything I can do short of a rebuild, what symptoms should I look for as the trans begins to get worse? Robert. GM TH350 Automatic Transmission. Browse Leak Stop in stock and ready for shipping right now! Vintage Car Parts Store. It had no sign of front or rear seal leakage, so I replaced the filter and pan gasket and then test drove it for several days. Leaking transmission fluid is one of the easiest ways to determine your car needs attention. Both the TH350 and TH400 have a similar look. Solve the problem with our front pump leak sealing kit for the GM TH350 Transmission, 1969 & up. This shaft sticks out about 1 inch past the case. Opening up the front pump seal drainback hole to at least 5/16" to keep from blowing the front seal out. After three times I tapped on the top of the tube to seat it down w/block of wood and finally got it ! Just a th 350. You'll need to get the pan off as the selector shaft has to be removed to change the seal. I also use TRANSTAR parts and there part# is 61991 ,which you might be able to purchase at a local tranny shop if you dont have a GM dealer handy. Gently tap new transfer case seal replacement way into place using hammer or rubber mallet. He replaced the front seal and told us there has to be a lip around the seal, He rebuilt the front pump, new bushing, new seal, new o ring, and a new gasket. I figured out the leak occurred every time I added fluid. Torque Converter Installation Instructions. Any ideas? Thanks. While there are several common places for leaks on the Turbo 350 Transmission, you may discover that you have a driveshaft yoke problem versus a transmission problem. This video will show you how to repair this transmission leak at the seal. The TH350 is from somewhere up front, maybe multiple spots. Then about 6 or 9 months ago he front seal started leaking. The thin is driver-side dipstick only and the thick is either. GM Turbo 350 Front Pump Leak Sealing Kit TH350 Transmission. Proprietary materials, installation aids and proven technologies help ensure a reliable seal on even the most troublesome applications. There is a shaft on the front of the transmission that slides either into the clutch plate or the torque converter that has splines on it. While there are several common places for leaks on the Turbo 350 Transmission, you may discover that you have a driveshaft yoke problem versus a transmission problem. But I got the rest of the seals changed. New Atp Set Of 4 At-205 Re-seal Stops Leaks 8 Ounce Bottle. This fits TH350 and TH400, for 3. Apdty 708613 Rear Driveshaft Front Slip Yoke And Seal Stops Clunk 12477702. I was wondering if there is a way to get the tube out without moving the motor from. This seal will stop the leak where your shifter linkage connects to the transmission. It's probably something easy to fix but I can't find solution to stop the leak. Alto TH350 TH350C 1996-86 Transmission Overhaul Master Gasket Seal Ring Kit. The TH350 transmission was introduced in the 1969 model year as the successor to the GM Powerglide automatic transmission. WILLIAMS October 31, 2015 at 3:58 am. my turbo 400 leaks right where the speedometer cable goes into the tail shaft. 50 T350 Front Rear Oil Seals Th350 Front Pump Seal Extenstion Output Turbo 350. Chevy 350 main bearing replacement procedure for these units to start leaking drastically than for the main seal to blow out. CSI Automotive Sales, Service & Parts. Th350 Amp 22 Amp quality assurance and price concessions. He replaced the front seal and told us there has to be a lip around the seal, He rebuilt the front pump, new bushing, new seal, new o ring, and a new gasket. Broken Seals. A common problem for buyers of output shaft seal replacement parts is that it tends to get damaged easily once the output shaft bearing leaks. Well low and behold it is not leaking now. Including TCI890900 - Powerglide/TH350/TH400 Transmission Seal-up Storage Plug Kit. Replacement bushing and seal fits GM Powerglide, Turbo 350, Saginaw, Muncie, Bert and Brinn transmissions. I have a turbo 350 that is leaking from the front pump seal and thought I would ask on here what all I should do to fix the leak. This is the shaft that came on a 4WD 350 transmission from the factory. When you shut the damn thing off a single leak is coming down from the seal and dropping on the floor, about a 1/2 pint per week. There are 4,348 seal bushing suppliers, mainly located in Asia. We put the transmission back up started it and leaking again. Ok I did have a big leak from around my detent cable but I found a seal on another transmisssion i had and fixed it. What finally fixed it was a later model dipstick tube with the "tophat" gasket and a new kickdown cable with a new seal in it as well and a new pan gasket with plenty of silicon RTV. CSI Automotive Sales, Service & Parts. Seals- Front Pump - It is vital to make sure that nothing important in your transmission unit leaks out and causes the parts to become flooded, and that is where the TH350 seals come in. CSI Automotive Sales, Service & Parts. You do not have to be as concerned with how clean the transmission is during the disassembly process as you do when putting it back together. The pan gasket is often blamed for the leak but is not usually the cause. Remove the lock nut from the shaft and slide yoke off. It's probably something easy to fix but I can't find solution to stop the leak. Classic Industries offers a wide selection of Chevrolet Bel Air parts, including Chevrolet Bel Air interior parts and soft trim, Chevrolet Bel Air exterior sheet metal, Chevrolet Bel Air moldings, Chevrolet Bel Air emblems, Chevrolet Bel Air weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. I pose to you all, should I replace it with the aluminum one ( which impala guys here say is a better unit), re-build my original cast iron one or the other advised move put in a turbo 350?. do a search here on FREEZE PLUG LEAKING. I'm willing to bet the leak is the same going forward or backwards, but you probably notice it more when you back up and the fluid sloshes out toward the front of the bell housing. It depends on the kind of transmission in many cases. The trans leaks from the front pump seal. ALL of my TH400's (and I've had several) ALL leaked at the converter to case seal - and no, replacing the seal doesn't fix it. It's best to get it looked at as soon as you begin to hear that rattle, as it can lead to bigger problems. Its main purpose is to deliver power to the wheels so that the automobile can move. Th350 Front Pump Rebuild Kit Gears Seal Bushing Gasket Oring Turbo 350 Gear Set Th350 Front Pump Rebuild Kit Gears Seal Bushing Gasket Oring Turbo 350 Gear Set 34-39 Tooth.