Joe Montana says Tom Brady told him that was a real issue in New England ... and Joe Cool believes it's one of the biggest reasons why TB12 is no longer a Patriot.
"I think that was one of his beefs up there," Montana told USA Today Sports on Wednesday ... "I think he would like a little bit of input."
Joe said in another interview Wednesday with SportsMap Radio that Brady broke it all down for him when the two were at NFL 100 ceremonies at the Super Bowl in February.