Your transmission fluid is actually run through your radiator and possibly a separate transmission cooler at the front of your car to help cool the fluid so it can cool in the components inside. Lastly, your transmission fluid is used to cool transmission components. Without lubrication seals like your front transmission seal can wear out more quickly and start to leak. Lastly, the transmission fluid keeps the seals in your transmission lubricated as well. This includes the gears and the bearings which are expected, but it also lubricates the shift components like the bands and clutches. One of the most important tasks your transmission fluid has is to lubricate the components inside. While this can be dangerous to drive your car like this, it won’t permanently damage the gears. ![]() Your transmission uses pressurized transmission fluid to move internal components to change gears and if your fluid level is low, the fluid won’t reach the pressure necessary to change gears. While inconsistent gear changes may be the most noticeable affect low transmission fluid will have, it is the only problem that doesn’t leave your transmission permanently damaged. The transmission fluid in your car has 3 very important jobs: ![]() If your transmission runs low on fluid it can cause serious problems. Your engine oil also probably has a similar warning light, but your transmission does not. Many cars even have a low coolant light that comes on to let you know to add some coolant before the level even gets low enough to cause your car to overheat. For example, if your engine is leaking coolant and the level gets low your vehicle will often start to overheat, but so slowly that you have time to pull over, check your coolant level, and top things off before any damage is done. Many leaks in your vehicle will you give you an indication that the fluid level is low and is causing problems before there is any catastrophic damage done. I would think if you had a bad seal it would leak most of the time.Transmission leaks are often silent killers of cars. I was told the rear main seals were bad, but it was an exhaust leak due to bad engine mounts. The ford would dump oil just like yours, exact same conditions. I have solved two leaks like yours on a ford and my 87 XJ that were oil leaks caused by superheated oil, exhaust blowing on the oil filter (ford) and on the oil pan block (87 XJ). Easy to get an o'ring hung up too on the install.Īlso make sure there is no exhaust pipe-cat issue overheating the Trans casing (you mentioned a busted exhaust system?). Thought I had the new one in only to wake up the next day to 6 quarts of fluid on the driveway. They are a special odd size!!!! Check Dorman on rock auto or one of 4x4 places on line like Morris. I forget the details, plastic QC with two o'rings. Also took me a month to find the new ones somewhere. I have nightmares about reinstalling them. Word of warning the QCs on the cooler lines to the transmission, they are a biatch to get loose and to reinstall. I take it then that it does not have a cooler? In that case I strongly recommend one first. Also when I let off the gas, I get a good vibe that I've always attributed to a slight misalignment of the rear DS, but maybe it's a bad bearing at the front pump that's caused that seal to fail but it only dumps fluid because maybe I'm sumping that pump? Any advice is appreciated. I've cleaned everything up from the valve cover down and there aren't any leaks prominent enough to cause this much loss smoke and it only happens after long high RPM runs so it seems more like something with the crankshaft anyway. It's redish right now since I just cleaned as much as I could but I used AMSOIL for the engine that also has a red tint to it so. Once I've been running 80 for a while and let off the gas, I get a huge steam/smoke cloud out the back from fluid being dumped onto the exhaust and it completely covers everything behind the bell housing and I can't tell if it's ATF or engine oil. It only blows fluid if I've been running 80mph (3000rpm) for at least 10-15 minutes after it's warmed up completely. You can stop here if you don't care about the back story. Main question, how hard is it to replace this front seal? On or off the Jeep? I've been wanting to drop the tranny so I can clean everything up under the jeep as well as clean it up so I may pull it anyway with the TC so I can reseal the TC properly too. I just replaced the rear main hoping the leak would subside and the area around that seal is perfectly dry but I'm still getting fluid coming out of the bell housing. The next step that I think is to replace the front pump seal on the transmission. I've had an odd fluid leak that I've been hunting down for a while.
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