The Automobile Drive Shaft Broken -1
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The Symptom And Troubleshooting Method Of Automobile Drive Shaft Broken

Symptoms of a broken car drive shaft

  1. When the car starts or when it is driving, there is a sound of impact on the transmission shaft, especially when it is driving at low speed in the high-speed gear position.
  2. When the car starts, the drive shaft has the same sound, and when the car is running, the drive shaft has the impact sound.
  3. When the car starts, the drive shaft has the same sound, and when the car slides, the drive shaft has the different sound.

The car made a lot of noise the whole time.

Analysis of the fault cause of automobile transmission shaft failure

Automobile-Drive-Shaft-1
  1. The flange connection of the transmission shaft (or the connecting bolt) is loose, causing abnormal sound.
  2. The external grease nozzle (commonly known as grease nozzle), a word shaft oil channel is blocked and does not inject grease, grease is not added on schedule, cross shaft oil seal damage and oil leakage and other reasons, resulting in cross shaft needle roller bearings in the long-term lack of lubricating oil conditions, so that the cross shaft journal, light needle and sleeve wear Large, the formation of loose and cause abnormal sound.
  3. Universal cross shaft assembly is too tight.
  4. Sleeve and universal joint fork hole with loose, loose support bolt lead to sleeve rotation, so that the universal joint fork hole wear is too large, loose and cause abnormal sound.
  5. Transmission second shaft spline and flange spline wear is too large, the formation of loose and loose and cause abnormal sound.
  6. The middle support bracket fixing bolt of the transmission shaft is loose, the middle support and the journal of the middle transmission shaft are loose, the spline and flange keyway of the rear end of the middle transmission shaft are loose and the rear nut is loose.
  7. The middle support bearing of the transmission shaft is broken, the bearing raceway is damaged, the bearing is poorly lubricated, and the wear is excessive and loose.
  8. The installation position of the middle supporting bracket of the transmission shaft is skewed, the bearing pretightness is adjusted improperly, the rubber cushion ring is damaged, the fixing bolt of the middle supporting bracket is tightened too much or too small, which causes the deviation of the bracket position and other reasons, and causes abnormal sound.
  9. The universal joint fork at both ends of the transmission shaft is in the same plane, so that the

Uniform arrangement is damaged and causes abnormal sound.

Automobile-Drive-Shaft-2

Fault diagnosis and troubleshooting of automobile drive shaft failure

  1. The car suddenly change the speed, the transmission shaft appears a metal knock, it can explain the individual flange or universal joint cross shaft bearing wear is too large and loose, causing the transmission shaft abnormal sound.
  2. When the car starts, the drive shaft appears a “just when” sound or noise. When the car is reversing backwards on the gentle slope, the intermittent sound of “gabba” can indicate that the needle roller is broken or broken, and the needle roller bearing should be replaced. Maintenance manual, circuit diagram, intractable diseases, etc. Space diary information is updated regularly every day. Auto repair resource sells all kinds of auto repair books and electronic auto repair materials. Buy information friends please see 00 space album to buy.
  3. When the car starts or shifts gears at different speeds, the transmission shaft has obvious metal banging sound, and the low speed gear is more obvious than the high speed gear. It is mostly caused by the abnormal sound caused by the reduction of interference fit between the inner ring of the middle support and the shaft.
  4. When the car starts or runs, the drive shaft always has an obvious “click” abnormal sound, accompanied by vibration, indicating that the fixing bolts of the middle support bracket are loose Move and cause abnormal sound.
  5. When the car is running at low speed, the transmission shaft appears crisp and rhythmic metal banging sound, and there is a clear sound when the car is sliding out of gear. The multi-series universal joint bearing housing is too large to compress, so that the bearing cannot rotate flexibly.
  6. When the car is driving, the sound of the transmission shaft increases with the increase of the speed, and the middle support bearing gives out a dull and continuous sound, which indicates that the middle support bearing is broken because of excessive wear. The car’s driving shaft emits a continuous “woo…” Sound, first check whether the fastening bolts of the rubber gasket ring and septum of the middle supporting bearing support are too tight or too loose (not according to the requirements of the tightening torque), so that the position of the bearing support is skewed. The tightness of the bearing cover bolts can be adjusted to eliminate abnormal sound faults. If there is still noise after adjusting the pretightness of the bearing, the lubrication status of the bearing should be checked. If the bearing is poorly lubricated, the bearing should be disassembled and cleaned, and the bearing and support should be installed after filling with grease.
  7. When the car is running, the sound of the transmission shaft is disorderly and irregular, and sometimes there is the sound of metal collision, which indicates that the universal joint forks at both ends of the transmission shaft are not in the same plane, so that the constant speed arrangement is destroyed.
  8. When the car is running at high speed, the transmission shaft has abnormal sound, and the abnormal sound of the transmission shaft still exists when the car is sliding out of gear. The raceway of the multi-system middle support bearing is damaged, or the installation position of the middle support bearing bracket is offset.
  9. In order to further verify the correctness of the above diagnosis, you can view and shake the parts of the transmission shaft when stopping to see whether the installation position is correct, whether there are scars on the surface of the parts, whether the fastening connection is loose, whether the clearance is too loose or too tight.
  • After parking, release the parking brake and push the universal joint with your hands. If it is loose, it means that the cross shaft needle roller bearing is loose.Display the parking brake disc back and forth by hand. If there is slack, it means that the spline of the first shaft of the transmission is slack. 
  • Pull the parking brake tight and shake the rear flange of the middle drive shaft back and forth by hand. If it is loose, it means that the spline shaft key teeth of the middle drive shaft are loose. Pull the flange of the middle drive shaft back and forth by hand. If it is loose, the nut at the back of the middle drive shaft is loose.

  10. In the car if the brake deceleration when the transmission shaft heavy metal knocking sound shows that after the steel ball dang horse riding nut loose.

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