Troubleshooting — Manual Transmission (MT) (Audi A4 B7)

63. When the manual transmission is set to neutral, the engine makes noise

1. The primary shaft bearings are worn out (noises appear when releasing the clutch pedal and disappear when pressing it).

2. The bearing of the manual transmission input shaft is worn out.

3. The transmission oil level has dropped.

4. The clutch release bearing is worn out (noises appear when the clutch pedal is depressed and may decrease when it is released).

5. The source of noise may be variations in engine torque - adjusting the idle speed may correct the situation.

64. Noise occurs in all gears

Any of the above reasons, plus:

• 1. The secondary shaft of the manual transmission or its bearings are worn out or damaged.

65. Noise occurs in any particular gear

1. The gear teeth of the manual transmission are worn, chipped or otherwise damaged.

2. Synchronizers are worn or damaged.

66. Noise occurs when shifting gears

1. The clutch is not functioning properly.

2. Synchronizer assemblies are faulty.

67. Manual transmission "jumps" from the selected gear

1. The gear shift lever cuff has hardened.

2. The gear shift drive components are jammed.

3. The gear shift mechanism is worn out.



4. The bolts securing the manual transmission to the engine have become loose.

5. The primary gear bearing holder is broken or its fastening has become loose.

6. Dirt got between the clutch lever and the engine crankcase.

7. The cone of the shift fork rods or control springs are worn or damaged.

8. The bearings of the driven or intermediate shaft are worn out.

9. The power unit suspension supports are worn out.

10. Excessive axial play of gears.

11. The synchronizers are worn out.

68. There are transmission oil leaks

1. Excessive amount of transmission oil has been added.

2. The output shaft seal or the speedometer sealing cuff is damaged.

69. Difficulty shifting gears

1. The clutch is faulty (see above).

2. The components of the gear shift drive mechanism are worn or damaged.

3. The transmission oil level has dropped.

4. Transmission oil needs to be replaced.

5. The striking rod is worn or damaged.

6. The gears of the manual transmission are jammed.

7. Synchronizer blocks are worn out.

70. The manual transmission locks up in any of the gears

1. There is wear or looseness of the drive rod.

(The original article is posted on the resource: AUDImanual.ru)