Ok so I am going to do the turbo II drivetrain swap since I really need a new trans and may want to eventually do the 13bt swap so im going with the turbo trans. and i have a na diff welded so im getting the turbo II rear end since I need it with the trans and am tired of the welded diff. Anyway, I am curious about the axle situation. If i were to get an s4 diff/axles will they fit my 4 lug hubs? and will my na competition front mount and stock rear mounts work with the turbo diff? my only other understanding (about the trans) is that I need the turbo slave and turbo clutch, everything else swaps right in. correct me if i'm wrong. any help is greatly appreciated. Thanks!

 

Your TII axles will fit the 4 lug hubs.
you need a TII starter too,and a TII flywheel,clutch and pressure plate.

 

And for the record, this is all in the 2nd gen FAQ.