i have a mondeo tddi mk3 and have put a used gear box fly wheel and new clutch kit.but when i put it i 1gear it will bang when i let up the clutch and the engine will judder i put a new rear engine mount but still the bang.can it be the drive shift? but it was ok before i removed it.can you give sum help as i dont wont to take out the drive shift if i dont have to.