Trouble shooting 2009 chev.aveo gearbox leaking oil on pan gasket how do i repair the leak on the gearbox

Clean the area well with gas or a spray cleaner/degreaser where you know it's leaking from. Since you don't want to go through the proper repair by removing the oil pan to replace the gasket, do this instead. After the area is clean and dry, tighten all the oil pan bolts first. Then get a tube of black RTV and put some on the end of your finger that reaches the spot the best and push the RTV into the area between the oil pan, gasket, and block. Make sure it's well covered to plug the leaky gasket and let the RTV cure. Shortly, your leak ahs been stopped. I personally do this myself to stop that same leak on my Chevy 383 I put in my Motor Home so I don't have to drop the pan. And it works.

An engine does not make oil, but it can spill the oil that should be inside. You could have an oil leak, which means that oil will be leaking from either the front or the rear oil seal. The front oil seal is just behind the crank pulley, the one that drives the fan / alternator belt. If oil is leaking from there, suspect the front seal.
If you have oil leaking from the bell housing, that the the bell shaped metal thingy between the engine and the gearbox. you can suspect the rear oil seal.
If you inspect the engine and see oil leaking from the oil pan under the engine, you have a leaking pan gasket. This can usually be solved by tightening the pan bolts, a whole lot of bolts underneath the engine.
Finally, and this is probably the worst, if you see oil around the breather pipe that goes from the valve cover on top of the engine to the gas intake system, you have leaking compression, that means either the valve stem seals are leaking or the compression rings are finished, and you will have to have the engine overhauled, or at the very least have the cylinder head overhauled.
If the rings are suspect, you will also have excessive smoke out of the exhaust when you drive, especially when you accelerate. Check the exhaust for signs of wet oil.

sounds like they didn't do the heads properly

FOR oil leak issue check the following help links:---

Common Causes of Car Oil Leaks?

http://schematicsdiagram.blogspot.com/2011/12/common-causes-of-car-oil-leaks.html

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Troubleshoot Car Oil leak?

http://schematicsdiagram.blogspot.com/2011/12/troubleshoot-car-oil-leak.html
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Car oil leak?

http://schematicsdiagram.blogspot.com/2011/12/car-oil-leak.html

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Car oil leaks from valve cover gasket?

http://schematicsdiagram.blogspot.com/2011/12/car-oil-leaks-from-valve-cover-gasket.html

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Rear oil seal leaking?http://schematicsdiagram.blogspot.com/2011/12/rear-oil-seal-leaking.html

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leaking oil from oil pan?
http://howtobyme.blogspot.com/2011/11/kia-sportage-leaking-oil-from-oil-pan.html

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leaking oil from timing cover?http://technoanswers.blogspot.in/2012/02/toyota-corolla-leaking-oil-from-timing.html

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How to Check Differential Oil Leaks and Replace Oil
http://schematicsdiagram.blogspot.com/2011/07/how-to-check-differential-oil-leaks-and.html

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Oil leaks from air filter on ford?http://technoanswers.blogspot.com/2012/01/oil-leaks-from-air-filter-on-ford.html

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---------This will help. Thanks.

Depending on the location of your oil leak, yes, it could be something that's expensive to fix. However, the reason for that expense probably wouldn't be the parts (it's probably some rubber gasket or seal), but rather the labor required to get to the rubber part and replace it. For example, if your rear seal has developed a leak, you may have to take off quite a lot of engine parts to install the $4.95 (I just made that price up, but it's not a particularly expensive part) seal.

It is possibly worth taking the time and modest expense to figure out the source of your oil leak, just to make sure that it's either something easily fixed or something that can safely be ignored. The tried and true method for tracking down the source of your leak is to get your engine steam-cleaned, so that you can see new leaks instead of chasing down old leaks or things tossed up onto your engine from the road. Then, put a sheet of clean cardboard under your car when you park it for the night. The oil will leak down onto the cardboard, giving you a place to start looking. Note, however, that the oil may have leaked from somewhere entirely different than where it is dripping--the leak may have first fallen onto a structural member, which then permitted the oil to flow downward to the ground. Still, with a clean engine, you should be able to trace the oil drip back to its source pretty easily.

The most common oil leaks occur from an oil filter whose seal has gotten pinched and isn't fitting correctly (something that will fix itself with your next oil and filter change) or a worn oil pan drain plug gasket (also something that can be fixed for pennies at your next oil change). You might also find oil weeping from an oil pressure sensor--again, an inexpensive and relatively easy fix. Next up, you might find oil weeping from a valve cover gasket or possibly even from the gasket between the engine and the oil pan itself. Replacing a valve cover gasket is a relatively minor repair; replacing the oil pan gasket would likely be more complicated because I don't believe you can drop the oil pan on this car without first having to pull the drive shafts (a fair amount of labor). You can also check out your EGR system to see whether any of the hoses in that system have become oil saturated and are starting to drip. Once you're past those possibilities, though, you're quite possibly starting to look at seals and gaskets that are rather more expensive to access and replace.

Lots of older cars tend to start "marking their territory" with the occasional drop of oil on the ground. If it's going to be an expensive fix, you might just learn to deal with that new behavior. A bit of clay-based kitty litter under your car, for example, can absorb quite a bit of oil. Conversely, if you have a serious oil leak, it's something you'll need to address so that you don't run the risk of a catastrophic blow-out, major loss of oil, and the potential for engine damage.

rebuild motor to clean all parts or take apart oil pan clean pan andoil strainer take valve cover off clean it

it depends where the leak is coming from........there are probably 10 places oil can leak from, some are not expensive to repair and others are. one common leak comes from the rear main seal and the engine and transmission have to be seperated from each other so that the seal can be replaced. that would cost a few hundred dollars or more. try to look under the car to see where the leak is coming from. sometimes you can't easily tell, but if it's from the oil pan or oil pan gasket, it's easy to see and not too expensive($50-$75 or so) to repair.............

I have the same car and the same problem. I can see the oil shooting out at the (upside down) rear, right side of the oil pan. This side of the oil pan is covered by a piece of plastic foam. There are no bolts on this side of the pan. Toyota recommends grey Formagaskit to seal the pan. The natural flow for this leak is all over the bell housing. The piece of plastic foam is attached to bell housing inspection cover. Good Luck!!!

That doesn't sound bad to me for a car with 120 on the clock.I would just keep an eye on the fluid levels on your trip and of course bring some extra trany fluid and oil just incase you need to add but I don't see that happening.

Faulty oil seal, simple as that, where it is will be for a garage to find.

There are three main oil seals, one each side of the gearbox (CV driveshaft seals) and the other which requires gearbox removal is the torque converter to gearbox oil seal. Hope its not that one!!

PS = I trust the gearbox level is correct and NOT overfilled as this will also happen,. Has anyone recently topped up trans and spilled fluid??