does changing gear oil help improve condition of gear

2006 TOYOTA AVENSIS
110,000 MILES
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SUNNY1234
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  • 1 POST
my gearbox makes noise when i go into 3rd gear and continues when i am in 3rd gear and also when i go into fourth.if i change the gear oil do you think there will be any improvement to the gearbox.

also my timing chain makes noise when i have driven for for a sustained length of time,or say after an hour or two of intermittent driving it starts and continues but i hear no noise when i go on short journeys at the beginning of the day.does it need to be changed immediately or can i wait till the time when i hear noise continously???
Nov 1, 2011 at 8:26 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
As far as the chain, are you refering to the timing chain? If so, I recommend that you follow the manufacturer's recommendations in the owner's manual.

Gear lube can get dirty. It should be changed on a regular basis. As far as the noise, it could be a bearing that is damaged. The cheapest thing to try is changing the gear lube. It will not hurt.
Nov 2, 2011 at 12:50 AM
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