4 speed noise

sorry for being that guys who responds many months later. I appreciate the help everyone. I suspect its the oil. Have not had a chance to change it out to something heavier. I did adjust the throw out bearing and that was not it.
After winter I am going to try a heavier oil (since its rally only noticeable after 20 minites of driving on hot days, then eventually change out those countershaft bearings (I did change the input bearing 5 years ago because it was pitted and noisy, everything else was fine).

thanks again!