Guys u have to help me i still have my irs but im not sure thats what the prob is, but my car is knocking everytime i shift gears with the clutch in and when i release it. It sounds liek it might be the backlash in the rear but we have checked that and all systems are go. There is alot of playin the drive shaft, i dotn know if its supposed to be liek that or not? If anyone knows what the prob is or has had that prob please let me know. Thanks!!!