988H wheel loader transmission and torque conveter problem

Good day wheel loader gurus

we have 988H wheel loaders purchased in 2010 . we operate in a coal environment. our loaders are experience recurring transmission system and torque conveter failures. these are mainly characterized by loss of pressure on the clutches and presence of metal filings. kindly help with the causes of these challenges and what we may do to rectify the problem

thank you

988H wheel loader transmission and torque conveter problem