I just got my S5 T2 motor and tranny in but the rest of the car is still S4 n/a ( the rear end at least). Can i use a T2 S4 driveshaft, i mean will it bolt in or will i have to get the T2 rear end as well like axles and diff.? And is there a difference between the S4 and S5 T2 rear ends, driveshaft back?

 

nah just get the T2 rear end , axles and diff. there are ways to mount up the n/a rear end but just finish the job the first time right.. N/a diff won't hold up too long... on turbo power. remember its n/a is strickly n/a.
im not say it won't work... but it won't work very long.