O.K this story might be long!! grab a beer and chips well here we go...My friend bought Cat TC120D at the auctions he said it was a great buy!?until it doesn't work.He called me to look at the unit maybe a big mistake for me.He show's me white thick goop from the trani stick. The oil stick is clean.He thinks it's the head?? Frost plug?? Rad?? Trani lines that run into the rad could of burst inside because he dosn't call me to do the maintenance. I figure there was more water in the rad and sat in the cold inside the building.Well the old Perkins is coming out?why i don't know?at this time my opion means $hit. Rad out- white goop-torque convert white goop-Engine block white goop.Any steps to bring back the old perkins to life!!!