hmm i think u can check ur gear oil....izzit surpose to change adi ....
izzit when ur tarik on 2nd and wanna engage 3rd got the sound krank....
clutch also can give tis problems also ....
one more thing i can think of is the gear box synchronizer mechanism...
synchronizer hub,sleeve,and ring is the one tat play the roll on engage gear ...if tis mechanism is worn the problems like u mention can occur also....