Trying to locate spout to add tran fluid or gear oil

if its the the gear selector is moving and not going into gear ----under hood drivers side under brake mastercylinder is the top of transmission the gear selector cable connection is there check that it hasnt come off,loose or damaged ----=if selector does go into a gear and trans not responding look under drivers side and thru wheel wells for fluid leak ---theirs no dipstick so to check fluid
There is a black cap located on top of the trans almost directly under the brake master cylinder. It's about 2 inches high, 3 inches around. That's where you add the fluid. The checking procedure is as follows: Start the engine and allow the engine to idle until the transmission fluid temperature has reached the value specified. 104 degrees F.
Depress the brake pedal and move the shift lever through the gear ranges, pausing a few seconds in each range. Return the shift lever to the PARK range.
vehicle must be level with the engine running and the shift lever in the PARK range.
Remove the transmission oil level control plug.
The plug in an 11mm bolt located between the r/s axle seal and the oil pan.
Check the fluid level. The fluid level should be even with the bottom of the threaded plug hole.
If you remove the plug and nothing comes out, add about half a quart at a time until the fluid starts to dribble out. Once it stops, the level is good.this is the procedure to check fluid if their is fluid and problem still persists the transmission module and or internal transmission damage possible which a mechanic {transmission}would need to diagnostic check the following link has multi videos for the cobalt transmission 05 Cobalt Transmission Fill Yahoo Video Search Results

1. The gears are in the transmission.. you can add oil to the trans if it is low.. Auto trans uses auto trans fluid. There is a dip stick.
2. Standard trans you must remove a plug in the side of it to check the fluid.
3. The engine uses motor oil.. you remove the cap that is attached to the top of the motor.. but first check the oil with the dip stick.

• There is a 8mm or 10mm plug on the back of the transmission (underneath the car) When you pull that plug if fluid comes out then it it full. If not you add fluid until it just barely comes out that hole and then the transmission is full.
• Now you add fluid from the top of the transmission. You have to look way down in the engine bay on top of the transmission for a red or black cap. It may say "do not open" or "open by a technician only." Take and pull that cap off and this is the fill spout for the transmission. It's a fill only, not a check. Add from this spout until it comes out that little plug on the back of the transmission.
• You will hear people call this a "sealed" transmission of "non-serviceable." Now you can tell them rubbish lol.
• To check the condition you can look to see if it is getting black or smells burnt. After 50,000 miles the fluid needs flushed and after 100,000 miles you need to change the filter and gasket for the transmission.

Regards, Tony

to add gear oil,that is if you want it in the rear differential, there is a plug hiden on the side of it near the center and put oil in till it runs out on its own, if you mean the transmission , if its an automatic put it it the tube where the dipstick goes in , but if its a standard, there ie a plug on side of trans. mid way of trans . same as rearend fill till it just comes out or put your finger in hole and if you can feel the fluid with finger its good.

the trans is slipping. check the level. with the engine hot, remove the dipstick and wipe clean. it will be located where the engine and trans meet. make sure it's not the oil dipstick. insert the stick and remove. the level should be between the lines or holes. if the fluid level is between those marks, don't add any. the type of fluid is printed on the dipstick. if the level is low add enough to the full mark only. add small quantities. 1/2 qt at a time. then check the level. if the level is good, have the trans fluid and filter changed. if that desn't work, there are mechanical problems.

Warm the car engine.Change through all the gears and finish in N.Check the transmission oil level.If it needs trans oil,add the oil into the tube that the trans fluid dipstick is located.The gears wont work if the trans oil level is low.Probably a good idea to find the oil leak.I hope this helps

How to Fill a Rear Differential
You may need to add fluid to your differential due to leaks or changing seals, or it may be time to change out the gear oil completely. Either way, it's just a few steps to fill the rear differential and get your vehicle back out on the road!This article will explain how to fill a rear differential. jQuery('.intro .thumbnail').each(function(i,e){ jQuery(e).find('img').one('error',function(){ jQuery(e).remove(); }); }); Difficulty: Moderate
Instructions and Things You'll Need:

• 3/8 inch drive ratchet with extension
• 2 quarts gear oil (gear lube, differential fluid)
• Side cutters
• Oil drain pan
• Shop rags
• Flashlight or shop light (optional)
• Lock tight (optional)

Filling a Rear Differential

1. Be sure the car is raised on four jack stands and is level. It will be more difficult to fill the differential if you've only got it raised in the rear.
   
2. Place an oil drain pan underneath the plug to catch any leaks or drips. Keep shop rags handy for any spills.
   
3. Check your service manual for the amount of fluid your differential needs, if you're completely refilling the system. Two quarts should be enough in most cases.
   
4. Remove the spouts on the gear oil containers. Peel off seals, then replace spouts. Use side cutters (or any cutting tool you've got handy) to clip off the top of each spout.
5. Remove the differential fill plug using a 3/8 inch drive ratchet with extension. (Some models may require a hex key or screwdriver, but the 3/8 inch is the most common plug design.)
6. Take the gear oil container and fit the spout into the fill hole. Pour the fluid inside. You can gently squeeze the bottle to speed the process. Repeat with a second bottle if necessary.
7. Fill the differential until the fluid starts draining back out of the hole.
   
8. Clean and replace fill plug. Use lock tight (thread locker) to help seal if desired. You can see my eHow article "How to Replace Rear Differential Fill Plug" (video) for more information.
   
9. Take the car for a drive around the block to get the gear oil moving. When you return, check underneath for any leaks from the fill plug or differential cover.
   

Hope help with this.

passenger side of engine compartment at very rear of engine.

You need a funnel to add trans fluid to the dipstick tube where u check the trans fluid level. Let me know if u need more help, Add fluid w/ engine running, shift car thru all gears to circulate fluid. Don't overfill, it's bad for the trans.

The automatic trans. uses ATF trans. fluid . The manual uses gear oil. The spout to check the oil is located on the side of the trans. right behind the radiator.