ROOT CONTACT -:

All about engine; if the pinion gear teeth and crown wheel teeth did link till the end or top it means this is a root contact, and this is a wrong contact
(Peak contact)
The pinion and crown wheel teeth does contact at the top of teeth then his said peak contact,and this is also wrong
(Toe contact)
If the pinion gear teeth did contact from the crown wheel teeth out side then his says toe contact we going show you some diagram about this