Hi,
Recently I've encountered such a problem: while speeding up and driving around 30 miles per hour a constant howling sound was comming out somewhere from the differential. When accelerating further it stopped but approaching 50 miles per hour it happened the same. Driving over 55 miles per hour it stopped again. We have now winter in Europe and the car was standing outside at a temperature of minus 3 Celsius degrees. Could the low temperature have some influence?
The situation happened all the evening yesterday and today's morning and after some drifting on the slippery road, strangely as it started, everything seems to be normal now. However, the situation may happen again, what then, shall I check the differential or something?
Can you please tell me what it could be??
Thanks in advance.