Libradtee wrote:Yesterday the lib started making this screeching noise
From where does said screechine noice eminate?
Is it all the time like when stationary or does it start only when moving?
Is it related to vehicle speed?
Please do tell us?????
As you are mentioning "Brakes" then maybe it is only when moving and related to road speed?
The brake pads have a wear limit stylus that with contact the dics and squeal when the barke pad thickness limit is reached.
This will make an umpleasant sound but should not effect fuel ecomomy.
A disintegrating centre diff will catch pices of broken metal between the gearbox case and the roatating viscous ciupling and sound terrible and increase drag on teh driveline.
But, no diagnosis can be performed over the intereweb.