Need suggestions Tranny not sounding good on the hwy

[Tom Rs]

I asked before but got mixed responses. What can i do to fix this. I drive and right before the tranny is about to shift into 3rd and also 4th i believe, the rpms like bounce. i kinda have to give more gas for it to shift. someone said torque converter gets locked ? i dont know, but whats the cheapest way to fix it. Will it damage it more if i continue driving ? BTW i had a ses a while ago its off now

[Jtownrook99firebird]

Go get the code checked most likely it's still there...