Question

Ankita/Ankit is working as a mechanic in an automobile workshop. She/He receives a car for repair with the defect, transmission is noisy in neutral speed position. Advise her/him to check for various probable causes of defect with their remedies.

Hint:

Tip: Noisy transmission in neutral = check bearings, gears, oil first!

Answer 1

If the transmission is noisy when the vehicle is in neutral, it indicates that some internal parts are worn or damaged.
Ankita/Ankit should check for the following probable causes and their remedies:
1. Worn Bearings:
- Cause: Worn or damaged bearings can create noise when the shafts spin freely in neutral.
- Remedy: Inspect and replace the defective bearings with new ones.
2. Improper Gear Meshing:
- Cause: Excessive wear or misalignment of gears can produce whining or grinding noise.
- Remedy: Check for worn gear teeth and replace damaged gears. Adjust alignment if necessary.
3. Insufficient or Dirty Lubricant:
- Cause: Low or contaminated gear oil can increase friction and noise.
- Remedy: Drain old oil, clean the gearbox, and refill with fresh recommended grade oil.
4. Worn Shaft Bushings or Synchronizers:
- Cause: Worn shaft bushings may allow excessive play, causing noise.
- Remedy: Replace worn bushings and synchronizers to restore smooth operation.
Regular maintenance and timely lubrication help prevent such transmission defects.