If ur gear is not changing please check the gear oil and gear filter it must be block the pressure is not building that is why it is not changing and secondly check ur clutch plate and pressure plate it must be worn out before u change the gear box.Call this number they will try to help u to solve the problem mobile:55368583 Shakeel or Al faleh garage 44424047 Mr.Naseer it is in Mansoora opp. Qutba restaurant