Well i ran the car pretty hard for the past 3 days since the motor build just to make sure everythings running perfect and top notch, but today on my drive home i noticed that when i would go in and out of 4th gear it seemed a little harder or more stiff than the rest of the gears to go in and out of when i would shift easy, but when i shifted fast i really couldnt notice a difference, so its not THAT bad. There is no grinding or anything whatsoever, thats the only issue with the tranny, all the other gears feel fine. Any ideas of what it is? thanks a lot.

P.S. - already searched this topic and didnt find any good results.

 

If you are making more torque it may take more effort to get in and out of gear because the synchros have more work to do. Why just 4th gear? I dunno, but in my car it is 2nd and 5th that are more difficult now.