Manual: In a manual transmission, the problem is not so much the fluid degradation, but rather fluid contamination. This contamination occurs over time as the synchronizers, bearings and gears in the transmission wear out. The resulting metal particles then float around in the lubricant.
A lot of mental illnesses can have a genetic component, yes (eg. depression, bipolar disorder, anxiety, antisocial personality disorder, etc.).
1 So if a child inherits the disease, at least one of the parents has the disease as well. 2  It is possible for the gene to change by itself in the affected person. 3  This change is called a mutation. 4  Unaffected children of a parent with the disorder have unaffected children and grandchildren. So if a child inherits the disease, at least one of the parents has the disease as well. 2  It is possible for the gene to change by itself in the affected person. 3  This change is called a mutation. 4  Unaffected children of a parent with the disorder have unaffected children and grandchildren.