-A/B PM: international,freightliner,volvo,hino,mitsubishi.
-transmission and differential servicing
-belts ,pulleys ,a/c compressor
-water pumps , coolant reservoir
-leaks
-brake shoes ,brake pads and drums
-rotors,wheel seals and wheel bearings
-know how to change brake chambers and know how to open them and rotate the connections in case they don't face the right way
-drag links,shocks,airbags,all type of air valves,tires,air tanks
-u joints drive shaft and yokes
-change belts and clutch compressor on refer units
-evap fans
-still learning how to diag and troubleshoot refer and lift gates
-know how to repair damaged door panels for the rear door of the box trucks