tranny question

i have a 88 cherekee inline six i wanted to kno if my problem was a sign of my tranny slipplin what does it slippin even feel like?

but the reason im asking is when i use to step on my gas with some super in the tank i would feel the power in the pedal and now it seems week it took me some time to notice it and im not sure more or less when the change came but im sure it was after the cold weather started filled the tank with super and check fuel pressure its fine bypassed my resistor thats the only major change made but i think i remember still feeling the power after i mash the pedal again im not sure when but it feels week

do i need to adjust th TV cable? how would i kno?

any helps greatly appreciated
thanks