In discussing whose halachic rulings we follow when tanaaim and/or amorim give different rulings, in Halachipedia it says:
Rav Yochanan vs. R' Yose bar Chanina is a Machaloket (regarding whom we follow).
I certainly don't have extensive coverage in terms of the parts of the Talmud I have learned, but I have not seen any instances where those two have differed. Can somebody give me an example or two?