my current car got gear box auto problem ... and need change gear box..

my car is satria 1.6 xli auto

i got offer from one friend for 4g67 gear box auto for rm 500.

my question.. is that this gear box good? and fit my current engine nicely? how the fuel consumption..performance.. quality? i really noob on this..

if i not mistaken my satria engine is 4g91/92..like that

i also want ask.. how much fee to pay workshop to install this gear box?? thxx