Hey guys i originally had a problem with my shifter not staying into 3rd so i adjusted it and now when ever im over 4000rpms and go to shift into 2nd it pops out or just stays there and the car just revs. But if its under 4000rpms it will go in fine with no problem. Then sometimes 3rd will do the same and rev. Any suggestions? Maybe Sychro's or clutch or maybe a bent shift fork or worst case scenario new transmission?