transmission issues

[mustangyellow]

hey everyone. Car in question is a 1994 mustang gt with a AOD-E transmission. the problem is that is shifts into the next gear to soon sometimes. where when it shifts into next gear, the rpms will be around 1k rpms then it acts sluggish. it does not do this all the time though. another problem is that sometimes when the transmission shifts from 3rd to 4th(OD), it acts like it gets hung and the rpms bounce from 1k to 1200 rpms. if you go ahead and give it some gas, it doesnt act like its bouncing back and fourth. the TCC(Torque Clutch Control) solenoid and the transmission fluid temp sensor was replaced. this bouncing started after the TCC solenoid was replaced. I think those bad parts were *masking* another problem. Another issue is that when you put the automatic gear shifter into second gear, it doesnt shift from 1st to 2nd and stay there, from a dead stop it start in 2nd, and then almost stalls then it will shift into 3rd. The owner has replaced all the fluid and replaced the transmission filter, and the fluid level is correct. also, there were no codes for the transmission that showed up. sorry for the long post, just trying to give all the information needed. Thanks everyone.