All CV shafts are held in by a retaining clip on the end of the inboard CV joint.
On the end of the shaft that goes in the trans there should be a little wire ring that has a split in it, that is what holds the shaft in. if the ring is still there you may just need to make sure that you are getting it seated all the way. They can be stubborn sometimes. You will be able to tell if it seated, you will feel it pop.
Just the output shaft of the transmission.
The drive shaft connects the transmission to the differential.
The drive shaft is part of the drive train, not part of the transmission.
If it's the "front seal", meaning the seal on the input shaft, you'll have to separate the engine and trans. Pull one or both to get to the seal.
Engine creates turning motion, flywheel connects to engine, pressure plate holds clutch to flywheel thus allowing power to be transferred to transmission input shaft (via clutch), different gears are meshed between the transmission input and output shaft depending on where gear shifter is positioned, transmission output shaft is connected to differential gears which connects to axles, which connect to wheels.
The output shaft seal has failed and transmission fluid is leaking by, and that would explain the transmission fluid appearing there.
the yolk is attached to the drive shaft by a universal joint. It slides into the transmission and allows the shaft in the trans to engage the drive shaft
Holds the Overdrive gears. On 2wd drive, connects to to drive shaft. On 4wd It is shorter and bolts directly to the Transfer case
A gear which causes the transmission output shaft to rotate at a higher speed than the transmission input shaft.
the drive shaft
short shaft