My transmission jerks when i drive around 45 miles an hour then it stops but its not a real problem

Can you be more specific, like engine size, transmission type, vehicle mileage, does the engine rpm's fall or flicker when start to "jump and jerk", does it keep doing it above that speed or stops beyond it. I am trying to determine if it is an engine or transmission problem. But I need details.

Depends in the mileage since the transmission was last serviced. It sounds like low pressure from the pump. It could be just a filter. You did not say where the leaking seal is, but a leaking seal will not fix itself.

Front brake rotors need to be turned and new pads. Adjust rear brakes. the front brakes are doing all of the stopping. (overheating the rotors, premature pad wear).

That is the speed when it would normally shift into overdrive or the torque converter would go into lockup.
It is also when the engine would be working hard and a slight miss could be magnified.
You may want to have a transmission shop test drive it for their opinion.

Unless you are low on fluid, I suspect you are in need of a rebuild. I have had similar problems before. Any shop will tell you to try a fluid and filter change. It has never brought one of mine back. I would suggest adding fluid to the top of the 'add fluid' area of the dipstick and no more. It can foam if it is to full, causing similar problems as being to low. I would add that if you have to replace the transmission - you need to consider that the car may not be worth the cost.
Good Luck.

Try driving it at that speed with your foot slightly on the brake pedal. (enough to put the brake lights on). If your lock up torque converter is acting up, riding the brake will dis-allow it from locking. Do this to see if it might be a lock up converter issue. (They usually lock up for better gas milage around 45-50 miles per hour.)

2008 Tucson? It should still be under warranty. Does it have more than 100,000 miles on it? Are you the original owner? If not, does it have less than 60,000 miles on it?.. If so, it's still under warranty - take it in to get fixed under warranty.

you should go to a transmission guy they have computers that will find the problem and i think that its free... but i think that your transmission needs to be rebuilt, theres a lot that can go wrong with them things

get your trouble codes checked with a obd2 code reader. most auto parts stores will do this for free it is the only way to know for sure what is causing the problem most mechanics will charge for this service. it could be anything from a fuel filter to an ignition module it sounds like a misfire but without the codes it's hard to tell. hope this helps

tranmission mount is broke change it before it breaks your motor mounts.