Th350 Vent Tube Leaking. I have a th350 behind a sb 350 in a vega. The only exterior seal

I have a th350 behind a sb 350 in a vega. The only exterior seal that I haven't changed is the down shift cable and I When I m in 3rd gear and revving it a little, fluid starts coming out of the vent hole on the drivers side up on top of the bell housing. Scored a rebuilt TH350 today for non the less, a freebie! 1K mi's, car switched to a 5sp!. My question is, Hi everyone, here's my problem. I have replaced it twice, and have replaced the tailshaft sleeve 1 time, but I still have the leak. It is leak badly out of the pan, and I checked it, and it is way over filled. TH350 Transmission Leaking from everywhere! The 1967 - 1972 Chevrolet & GMC Pickups Message Board I once had a pinhole leak at the dipstick tube where the welded tab bolted to the bell housing. If vehicle sets for a long time, say a couple weeks, oil may leak out the vent as oil from the torque convertor will seek its lowest level - gravity thing - through the oil pump into the Dip stick tube leaks are more obvious and would leak all the time. I had it on I see that the thing I am talking about is really called a BREATER, and not a vent. I am going to try putting a hose on the vent tube as well as clean Are there common leak points that can be addressed without removal? If I take it to a transmission shop, is there a reasonable chance they will be willing to find and fix the leak 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 Hello everyone, just noticed the last time I drove my car I have trans fluid leaking out the extended breather located by the dipstick tube. Dillema= Vent tube is leaking out of the case, and not the tube. Here's a quick, simple, and fairly inexpensive way to fix both Kick down lever case seal Selector shaft seal Vac modulator seal Pan Gasket Vent tube (leaking here indicates an overfill or over pressure condition inside the case) So my th350 has a fluid leak that seems to happen all the time but most noticeably at high rpm heavy acceleration. I am running the locking tci dipstick. if tranny fluid comes gushing back out the tube then the vent is clogged. Sometimes the transmission will "burp" fluid out of the vent tube. I ve only added 9 quarts of oil because it was The only place I've seen it leaking is out the yoke but it does seem to happen when it sits for a week or so. I want to pull it/clean it/seal it, then i'll run an external hose downward I don't want to hack it, and just gob a bunch of shit It can't be leaking up high, without leaking at the lower end. Trans may be over filled causing it to push fluid out the vent or the vent tube is plugged and the trans is developing When you shut it off and it sits, some of the fluid drains down out of the converter and the fluid level crawls up the dipstick tube and leaks out of the oring. It will leak enough to have fluid hit the exhaust pipe and Chevy TH350/TH400 Common Transmission Leak Fix (and Fix the Speedometer Too!) Maddox Manual Bead Breaker: Does it work? Swap Tires At Home! But Can You Beat My Time? Do you own an old Chevrolet with an old 3 speed Transmission? Chances are you will experience this leak around the Tail housing area. ) Are ya' trying to keep the undercarriage rust free ?? TH350's are prone to leak. Its more so coming from Ok so I have this 71 350 4 bolt main, and a 71 TH350 like that matters. A plugged or pinched vent line will cause the tranny to push fluid out the top of 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. Howdy y'all! Well my turbo 350 My trans is leaking around the dipstick hole. The fluid will trickle down the trans case causing it to appear that the trans is leaking in other locations. I removed the chrome tube and put a new O ring and some sealer on it but still have a leak I think some trans fluid still seeped up Find some tight fitting tubing, that fits over that little vent tube, on the top of your trans. The TH-350 vent is on the drivers side of the case. Probably the initial leak was caused by the leaky input shifter seal that I replaced a couple weeks back. With the leak the trans fluid is rarely full. if you just hear air escaping from the top of At this point I have a leak from the rear tailshaft housing seal. Mine uses a small check valve instead of a tube. The vent is on the drivers side at about the 11 O'Clock position (on the outside) You can see the small vent on my TH350 on the driver side of the case. Same thing, but maybe somebody else will look at this now. DO NOT plug the vent! It allows moisture to evaporate as things I thought the vent tube is up front on the drivers side. What should I do? I have seen The way to check is you can blow air down the dipstick tube. If those leak it's usually because the tube isn't driven down into the transmission far enough. I can pull it out and put it back so I The vent on a TH-400 and Glide are on the passenger side. 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. I am running If you just want to get the thing to quit leaking so you can see how it works, then you can ignore the detent cable, plug the hole in the plastic fitting and make sure it has a good O C3 Tech/Performance - TH350 Strange Dipstick Leak - Hey All, I recently rebuilt my TH350, everything appears to work fine except for a mystery leak out of the dipstick/fill tube. I think I worked on every turbo 350 GM made Episode 97 of Bad Hombre Garage: my car has been leaking transmission fluid pretty bad, and the speedometer isn't very accurate. After cleaning the excess oil off, apply about ten lbs of air to that tube, and watch to see TH350 Transmission Leaking from everywhere! The 1967 - 1972 Chevrolet & GMC Pickups Message Board Hello everyone, just noticed the last time I drove my car I have trans fluid leaking out the extended breather located by the dipstick tube. It always pukes out the tailshaft vent for some reason. Also the tube is loose in the hole. I have a Hughes TH350 transmission is leaking oil where the oil dipstick tube enters the housing (red arrow in pic below). Use a big screw . Make sure the tube Dipstick tube is very common on th350 as is the kickdown cable (plastic housing that cracks / bad oring/ seal etc. . The Trans is the The filter uses a gasket not an "O" ring, and if it is not installed correctly it will also cause a leak. The trans has the short tailshaft. The leak is near the back on the passengers side. The detent cable area and the front part of the oil pan leak.

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