Ive ran into this problem. It could be one of two problems, but what i have that it could be a bad crank seal or there is a crack in the case. First check the crank seal if it is good then you need to split the case and find the crack. JB Weld will fix it right up.
If it is loose you will almost certainly have lost fluid and the vehicle may not move.
No it is not necessary.
There could be a transmission fluid leak. Check the seals. They may be loose or worn out.
If it is and automatic transmission....you probably have a damaged or loose hose going to the radiator.
It is on the passenger side of the transmission towards the back of it. It will have a vacuum hose hooked to it. There will be a small bracket with 1 bolt that holds it in the transmission. Do not loose the small pin that is inside of the transmission when you remove the modulator valve. You will loose some trans. fluid.
My 1990 Chevy celebrity does not have a drain plug on the transmission pan. Your car probably does not have one either. You could break loose a transmission line from the radiator and add fluid in the dipstick tube while the car is running until the color of the transmission fluid clears up. I am guessing you are trying to change the transmission fluid. This is how I changed my transmission fluid there are lots of videos on how to do this on youtube.
loose timing belt, low transmission fluid in transaxle.
A transmission fluid leak means that the plug may need to be replace, or the seal or gasket may need to be replace. As it could be caused by a work seal, or gasket, or a loose plug.
AnswerA loose nut behind the wheelcheck transmission fluid level if automatic
No! There is no transmission fluid level indicator light. Must be checked manually. Unless you have a leak, you would almost never loose transmission fluid and need to add any.
Either loose bands or low fluid or bad fluid. Also could be a clutch problem.
If you mean 'transmission drain plug', there isn't one. You must remove the pan to drain fluid. Be careful, and have a large paint tray or similar because as soon as the bolts are loose, fluid will come out.