Leaking transmission oil where the the cv joint connects to transmission

cv joints should not click as that is the first indication of a failed unit
( going slow and changing direction produces a click,click is a cv joint)
wheel bearings should not be tight as that will produce a humming noise and will result in early failure
because the axle turns with the change of direction ,the distance from the pivot point to the transmission changes and so the shaft will move in and out of the transmission to compensate
take it to an accredited drive line specialist for a diagnosis

It costs:
CV Joint boot cost + Graphite or silicone grease + Transmission oil (less than a Liter) + Service charges.
It is hard to mention the exact price.

There is a seal in the gearbox and this has been damaged so oil is leaking past it out of the gearbox. You will have to carefully replace this seal, to do this you need to take the gearbox out of the car, put it on a bench and carefully remove the old seal and press in a new one.

Is it a standard tranny or auto? The CV joints usually make an awful racket before they go, the bearings and seals go out, and it will leak oil, But I don't think it would be gear oil in an automatic, I might be wrong, been a while since I messed with CV joints, don't have any cars with front drive anymore. The auto tranny fluid is red, and thin, gear oil is black and thick, like maple syrup. In case you didn't know, The CV joints are an easy fix for most shops, they used to do it for about $150, I have no idea what they charge now. Check it out. Hope this helps.

If it is leaking grease out of the cv joint, you will have to replace the rubber cv boot or eventually, the entire cv axle, if it gets worn because of lost grease and no lubrication.

there is no such thing as transmission oil but if its atf fuild red in color replace carrier seal (but more likey its a torn cv boot and your seeing the grease ) in this case remove and imspect cv joint repack bearings and install new cv boot

yes, it could be a balance shaft seal. that's observant..

All depends on where it's leaking from. If it's leaking from the transmission pan, then it's going to be a bad transmission pan gasket. If it's leaking from the transmission cooler line or connections from the transmission to the radiator, replace the line or the connections or just the O-rings in the connections. If it's leaking from the transmission housing where the engine and transmission mates, then it may be the from pump or Torque Converter. The leak could be coming from the CV joint inner shaft where it connects to the transmission. Good luck and keep am eye on your transmission oil level, low transmission fluid will cause transmission failure.

The out put shaft bearing may have gone bad and the transmission oil is leaking out and running down the CV joint on the out side. The other thing to is check the CV Joint, if it's the inside joint. It will not make any clicking noise, just the out side joint where the wheel hub is and when your making a turns is when it makes the clicking noise. The best thing to do is to jack the car up and make sure you use stands to secure it to make sure the car does not comedown on you. Inspect the CV joint, look for excessive play and oil leak from the transmission if any. Good luck and keep me posted, Oh and don't for get to check your transmission fluid level. 

yEAH! The CV axle transfers power to the wheels,, Just as a drive shaft does in a RRD