I purchased a VXL AGS Alto in September 2019. Since yesterday, I've been hearing a strange (khraachhhhh) sound whenever I put the gear into R. I've checked the gear and engine oil levels, and they seem fine. However, I'm puzzled as to why this sound has suddenly started. I regularly service and maintain my car at an authorized service center (Danish Motor, Karachi). I'm posting here to see if anyone else has experienced a similar issue. Could this be due to wear and tear over time, or is it a manufacturing issue? The car has only been driven 32,000 kilometers in the last 4.5 years. Can someone provide guidance, please?