How to change transmission filter ? it has a hard line GOING IN THE SIDE .

From the sound of it you really are going to need a transmission service beyond just a fluid and filter change. Generally speaking, when a trans. filter becomes restricted, it limits the flow slightly. You're more likely to take off more slowly and shift more slowly. Hard hitting transmission issues gets into the clutches and solenoids.

You can always take off the transmission pan and replace the filter, it's not that difficult if you know how to properly re-seal the pan after properly installing the new filter. U-tube has many videos of transmission filter and pan replacements.

Transmission Harsh shifting - YouTube

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https://www.youtube.com/watch?v=aAoiL4vR8Qw
Jan 13, 2013 - Uploaded by James Burns
hi i have a 2004/05 misubishi lancer just recently the neutral light keeps ... Should I just change the fluid and ...

Why is My Transmission Shifting Hard? - BlueDevil Products

gobdp.com/blog/why-is-my-transmission-shifting-hard/

Jan 2, 2014 - Is your automatic transmission giving you trouble or shifting too hard? ... It was a great idea to get your transmission fluid and filter changed and to keep .... I have 2014 chevy traverse, when you down shift and at the end of a gear ...... It mayalso be due to the 3rd gear shift solenoid going bad so that may be ...

Transmission Will Not Shift Properly : Volvo S80 Common ...

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It sounds like your over-drive is going out. Have you serviced the transmission lately? I would highly recommend also having the gov. pressure solenoid screen cleaned and as with most all Dodges, I recommend installing a inline filter in the pressure line going to the cooler. It will prolong the life of your transmission.

It's not hard to do and most any parts store can order you 1, the small inline filter looks like a metal fuel filter, cut the metal line going to the cooler, add some rubber trans. hose and filter. but only AFTER having your transmission serviced! Whoever services your transmission have them inspect the pan well, if you have a lot of metal in the pan, you will more than likely be looking at replacing your transmission in the very near future. Hope this helps.

if you get under the car on the driver side were the oil filter is and look were the filter screw onto the motor,if you see 2 large lines coming from the plate that the filter screws onto going to the front of the motor and attach to the lower rad then you have an engine oil cooler in the radiator.there will be lines that come from the transmission to the radiator that are considerably smaller.

It's time for a trasmission fluid and filter change.

They are relatively inexpensive at most one stop auto shops, however your vehicle is extremely easy to change the transmission fluid and filter.

It is located under the front bumper on the bottom side of the engine. 10 to 16 bolts and the transmission pan is off, two to four bolts to remove the filter, and then reverse.

Please do not do this yourself if you are not positive you can do it correctly.

The good news is, if you get your transmission fluid and filter changed in the next 50 miles you drive, you are likely to avoid catastrophic transmission problems.

There are two ways to changing the transmission oil. If your going to change the transmission oil and filter, your going to have to drop the transmission oil pan to get to the filter and the oil will drain from there, but keep in mind that it will get messy. The other way to replace the transmission oil if that is all your going to do is to get a large bucket and a small hose the size of the transmission oil line. You can disconnect the transmission oil line from the radiator on the passenger side and connect the hose to the line and the other end to the bucket. Start the truck and try to do this with two people, one to hold the hose and one to start the turn off the engine when the transmission is almost out of fluid. DO NOT RUN THE TRANSMISSION DRY, so make sure the other person understands you when you tell them to shut off the engine. This will ensure that you replace most of the fluid in the transmission, once most of the oil fluid has been drained from the transmission, just reconnect the oil line and refill the transmission fluid through the oil dip stick. Good luck and hope this helps. 
Automatic Transmission, 4L60-E Initial Fill..........4.7 liters
Automatic Transmission, Total Fill 4 speed 4L60-E..........10.6 liters

Trying changing your transmission fluid and filter. The fluid gets gummed up and causes very rough shifting. It may also be low as well. I would suggest a full back flush where all fluid is pulled out of the system including the torque converter whereas a simple fluid and filter change will not do that. Also, there is a transmission fluid filter on the transmission lines, it looks very much like an oil filter. I believe that will greatly help your problem.

Could be. Also, you maybe due a filter and fluid change.

If it's manuel you just need the oil, there is a fill hole and a drain hole on the side of the transmission. If it's an automatic, there is an transmission filter that need to be changed if it's been there long enough. 
The cheaper way to change the transmission fluid is to have a transmission shop flush it out with a transmission flush system that connects to the high pressure side transmission line and it replaces the old oil with new one and check the transmission line pressure too. This re places 15 liters of fluid. The more expensive is if you just drop the transmission pan and change the oil and filter you only replace about 3 liters in total and if you don't mind the mess you can do it your self for around $50.00 for the filter, gasket and Transmission oil.
Good luck and keep me posted.
Keep me posted and good luck, be glad to help.

Transmission is worn and previous owner has added transmission fluid additives like Lucas transmission oil to try to make it last longer. The fluid is burn and needs to be changed, best thing to do is to have the transmission fluid and filter changed and add some additives to the fluid and try not to drive it to hard.
It shift's hard when your driving at normal speeds because the fluid is thicker then it should and the transmission line pressure is higher due to the thicker fluid. At WOT the transmission slips so it seams smoother and that's why the fluid is burnt.
Good luck and hope this helps. Do not do a trany flush, the transmission is already worn out, but the dirty fluid will make it worst too.