My auto trans is slipping an I know its going to go out soon can anyone help me with what parts I need to do this I know I need a trans, drive shafts, clutch pedal, clutch, fly wheel, and have my pcm flashed or does anyone know if I can even put g56 in a 99 or not.

 

you can if you adapt it... should be very similar to the NV5600 other than it's an aluminum case instead of an iron case like the NV5600 (which was an option for the 99)

 

Do you really want a aluminum case? the ZF5 behind the powerstrokes are notorious for cracking.