Question about Subaru Legacy

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My 1998 Subaru Legacy makes a chattering noise from the rear differential when I acceletrate hard, there is no noise if I accelerate lightly or at any other time. It is suggested that a differential oil additive may help if so what additive or oil ?

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  • pkcnews Sep 11, 2010

    U joints were all checked. We have been driving the car like this for a year with no apparent deterioration or increse in noise level. No apparent bearing failure but crown wheel teeth apear slightly worn hence suggestion of enhanced oil. Subaru parts in South Africa have to be imported from Japan ( +- 5 months) and are very expensive (over 100 % duty for a start) hence interest in alternatives.

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  • Subaru Master
  • 2,007 Answers

Providing you have inspected the u-joints, i would think it would have to be a pinion bearing gone in the rear end at the very least. No oil or additive is going to fix it. It will have to be torn down and inspected.

Posted on Sep 10, 2010

  • Dar
    Dar Sep 12, 2010

    Then i guess your other option is to find one at an auto wrecker. You could probably get the whole rear end for a hundred bucks. Don't be afraid of used parts. You drive on them every day. Good luck!

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