Th350 leaks when parked

If the trans in your truck leaks fluid when the vehicle is parked uphill, fluid may be coming out of the weep hole due to failure of an output shaft O-ring. If your truck has this weep hole (arrow in photo below), you will be able to see it with the driveshaft removed by flipping the yoke to the side. The 350 turbo in my street rod does the same thing.I drive it and no leak for weeks,then it will start to leak out of the shift shaft seal.A tech friend who's opinion I highly respect,told me when these trannys sit awhile the torque converter drains down,and the oil level rises thus forcing oil out of any seal that isn't 100%. '67 Camaro survivor I have the old style tube, with an O-ring for the seal. Recently, it started to leak excessively from this point (about 1/2 quart per month in my drip pan). I know this is a common leak point, and that many people can't seem to get it sealed with just a replacement O-ring. Your car may have a transmission fluid leak for a variety of reasons, but before we talk about why you have a transmission fluid leak, it’s important to talk about how to identify one. You’ll notice a bad transmission fluid leak when parked when you see some funny color or funny smelling oil on the garage floor when you move your car. My 700R4 has been leaking so I thought it would be helpful to go over a few places your transmission can be leaking from and share a tip for how to find the ... Oct 31, 2019 · If your Impala is slowly leaking transmission fluid from the pan directly onto the ground, the transmission leak is as serious as when it leaks onto the exhaust. You should still deal with it right away. Leaking Transmission Causes: Chevy Impala. Here are some of the most common places that your Chevy Impala may leak transmission fluid from. 1. Hi, i have a Th350 trans which is a pain, as it leaks fluid and when stood / parked for a month or so does not want to go into gears, ie. drive . after i let idle and rev it for a while it comes back, is this the torque converter leaking or something else. how easy is a quick seal and gasket service on one of these ,and do i need any special ... I am working on a 72 C10 with a 307/350 turbo combination. It seems to leak a bunch of transmission fluid after setting for a period of time. 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. No leaks! Leaks after the engine is shut off are usually pan gasket or filler tube. When rebuilding the C4 the o/haul kit contains new o-rings for both. If they weren't used then that would be the first place to look. What is happening is the converter is draining back into the pan and the oil level can actually get high enough to spill out of the vent. Dec 31, 2013 · I use to work at a transmission shop back in the late 80s. I have a lot of experience fixing leaks and fixed a lot of leaky Turbo 350s that nobody else could seem to fix. The shift shaft seal is a very common leak point and it does appear to be leaking from the pan gasket when it leaks. If the trans in your truck leaks fluid when the vehicle is parked uphill, fluid may be coming out of the weep hole due to failure of an output shaft O-ring. If your truck has this weep hole (arrow in photo below), you will be able to see it with the driveshaft removed by flipping the yoke to the side. Sep 09, 2020 · Th350 no gears only park. No leaks full fluid while running. Mileage not available. Mid 80’s Chevy caprice. 88. Nothing. - Answered by a verified Chevy Mechanic It sounds like it may have originally been over filled. Fill 4-5 quarts, then start the truck and then slowly fill up the remaining fluid. This should keep it from leaking from the vent hole. Sep 09, 2020 · A new speedo housing leak stop kit for the GM TH350 Transmission, 1969 & up. Includes outer oring and inside metal clad gear seal to stop leaking at your steel bullet type speedometer housing. Free shipping to any U.S. address. Please see worldwide shipping calculator in this listing. Shipping. We combine shipping on multiple orders! My 700R4 has been leaking so I thought it would be helpful to go over a few places your transmission can be leaking from and share a tip for how to find the ... Apr 19, 2002 · The TH350 in my plow truck has developed a leak... a pretty big leak. The leak appears to be coming from inside the bell housing. It leaks when parked and not running... not sure if it does it with the engine on. Hi, i have a Th350 trans which is a pain, as it leaks fluid and when stood / parked for a month or so does not want to go into gears, ie. drive . after i let idle and rev it for a while it comes back, is this the torque converter leaking or something else. how easy is a quick seal and gasket service on one of these ,and do i need any special ... Aug 02, 2017 · If your car has been parked for several days, and, when you move it, you notice fresh drops or a puddle of fluid in your garage or on your driveway, you could be losing transmission fluid. Most cars have several different types of fluids, so it's important to try and determine where the leak is coming from. A new speedo housing leak stop kit for the GM TH350 Transmission, 1969 & up. Includes outer oring and inside rubber gear seal to stop leaking at your speedometer housing. This kit fits the larger speedo housings designed for 34-45 tooth speedo gears. I've got a TH350 in my Camaro w/120k original miles. It leaks up front, just enough to put a noticeable wet spot in the driveway anytime it's parked for a few hours. Does not appear to be around the pan anywhere. We want to locate the leak so we have to do some basic checks to eliminate the transmission fluid leak. Most cars or truck’s transmission fluid is checked with the engine running. First, open the hood of the vehicle and locate the transmission dipstick as listed n the picture below. I have a mildly built TH350 that seems to leak from the detent cable fitting, when it sits overnight. And it seems to almost completely drain the fluid, so much that the car will barely move. I am about to replace the cable with a Lokar braided cable. Does it seem pssible that it could be losing that much fluid from this location when the car isn’t even running? I am working on a 72 C10 with a 307/350 turbo combination. It seems to leak a bunch of transmission fluid after setting for a period of time. 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. No leaks! Move the Chevy vehicle from its parked spot. If there is any red fluid on the ground, then the transmission is leaking. Step 2 If the engine is cool, remove the radiator cap. Place your 2x4 on top of the seal and double check your alignment. Give it good solid hit and check it to make sure the seal is seated all the way down to the tail shaft housing. If not one more hit should do it using the 2x4. If you don't do this and have the seal strait it can be cocked and get deformed and leak. My body guy sent me a picture today of a huge puddle under the car of trans fluid. The car had not been moved or started since I parked it in his body shop over a month ago. He said the puddle was not there 4 days ago. The trans did not leak before I dropped it off. The trans has new seals, new speedo cable and gear. ... Look above the leak area for a higher leak (already mentioned in thread),and if it still leaks with the correct torque which BTW is 12 (TWELVE) Ft. Lbs.according to the GMC shop manual in front of me,then please re-post. The 350 turbo in my street rod does the same thing.I drive it and no leak for weeks,then it will start to leak out of the shift shaft seal.A tech friend who's opinion I highly respect,told me when these trannys sit awhile the torque converter drains down,and the oil level rises thus forcing oil out of any seal that isn't 100%. '67 Camaro survivor Look above the leak area for a higher leak (already mentioned in thread),and if it still leaks with the correct torque which BTW is 12 (TWELVE) Ft. Lbs.according to the GMC shop manual in front of me,then please re-post. May 17, 2009 · hi, transmission question. why does my 350 turbo blow trans. fluid out the dipstick tube? insight on what i've done, i'm building a 80 camaro muscle car for street and strip, i built a 383 stroker about 10:1 compresson, my 350 turbo is out of a 1973 monte carlo, i had it rebuilt with a steel sprag and a reverse manual valve body, i also have a 3500 stall that only stalls to about 2700. i ... Apr 19, 2002 · The TH350 in my plow truck has developed a leak... a pretty big leak. The leak appears to be coming from inside the bell housing. It leaks when parked and not running... not sure if it does it with the engine on. I just changed out my transmissions in my 85 c10 Silverado LB from a 700r4 to a th350 because it was slipping gears and after I got everything connected and put 5 quarts of fluid into it I forgot to put the other 4 quarts in and went to go start the truck and it wouldn't move in any gears so I checked the fluid and realized it was low and I put more into it and made sure it was right at the ... The 350 turbo in my street rod does the same thing.I drive it and no leak for weeks,then it will start to leak out of the shift shaft seal.A tech friend who's opinion I highly respect,told me when these trannys sit awhile the torque converter drains down,and the oil level rises thus forcing oil out of any seal that isn't 100%. '67 Camaro survivor Torque converter drainback is a common issue with the TH350 transmission as it ages. The solution is to drive the car every couple of weeks or at least start it and let run until everything is warmed up. Aug 02, 2017 · If your car has been parked for several days, and, when you move it, you notice fresh drops or a puddle of fluid in your garage or on your driveway, you could be losing transmission fluid. Most cars have several different types of fluids, so it's important to try and determine where the leak is coming from. Move the Chevy vehicle from its parked spot. If there is any red fluid on the ground, then the transmission is leaking. Step 2 If the engine is cool, remove the radiator cap. Oct 31, 2019 · If your Impala is slowly leaking transmission fluid from the pan directly onto the ground, the transmission leak is as serious as when it leaks onto the exhaust. You should still deal with it right away. Leaking Transmission Causes: Chevy Impala. Here are some of the most common places that your Chevy Impala may leak transmission fluid from. 1. May 17, 2009 · hi, transmission question. why does my 350 turbo blow trans. fluid out the dipstick tube? insight on what i've done, i'm building a 80 camaro muscle car for street and strip, i built a 383 stroker about 10:1 compresson, my 350 turbo is out of a 1973 monte carlo, i had it rebuilt with a steel sprag and a reverse manual valve body, i also have a 3500 stall that only stalls to about 2700. i ...