Never did this but i guess its starting to happen more then usual

-while im driving SOMETIMES (meaning not all the time) i CANT shift into 2nd 4th or reverse ?? wtf ?? if i try to force it in i feel like im trying to shift into a brick wall , it usually goes in like butter all 5 gears and reverse.

- anybody know what this is ? im hoping its not the tranny !

-any suggestions are greatley appreciated , and you ppl know i rep ! so plz help me out