My car ia an '87 Euro 300D, 124 body.

Lately, I have noticed a clunking sound at my car's rear end every time I make a left and while stepping on the gas pedal. If I turn left while coasting, the car seems normal.

I have thought of the following: failed spider gears on the rear differential, failed CV joints on rear axle.

Has anyone experienced this problem? How was it corrected?

Thanks a lot

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Jake