lately i have been having a problem with my transmission. when i drive for a while, my transmission gets stuck in second gear and will not change to third. it goes all the way up to 7000 rpm and still will not change. this only happens sometimes or if i drive the car for a long time. im thinking that it might be because the transmission fluid might be low or something. so i was wondering if anyone knows how to fix this prblem and also how i can check how much transmission fluid there is and also how to change it. i dont have the owners manuel so i cant look in there. also one of my belts are loose. i think its the ac/ water pump belt becuase every time i turn on the ac, there a high pitched screetch that come from the engine. i think that the belt is loose so i was wondering how to tighten the belts. well i really appreacite all your help on this if anyone can help me let me know. thanks guys bye