Golf R Mk6 with 50k miles. I had my Haldex fluid and rear differential fluid changed yesterday. Today started hearing grinding type sound coming from the rear of the car whenever making a 90-degree turn. Long story short, we suspect the two fluids were swapped. My mechanic is trying to get the dealer (supplier) to replace the fluids so he can drain and fill with the correct fluids in each. Will this error cause any damage to the Haldex or rear diff?
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