Ford Lynx Ghia 2000 A/T

Problem
: May umuugong from the engine once you stepped on the gas, and when you let go, the ugong gradually lowers down (but does not stop agad). It also seems like the engine exhausts the entire gear power before moving to another gear ....

Recently serviced: automatic transmission fluid, engine bushing, spark plugs, brake pads, underchassis all changed, engine support, okay; Tune Up done with; Sensor sa air cleaned.

For your advisory, please. Thank you.