R34 GT-Four questions...

[GTSBoy]

The front diffs for all the AWDs should be the same.  They are not LSD - they're all open, F160 (I think it's 160) type.

The GTR rear diff is, of course, quite different to the other cars'.  CV joint input on the rear end of the tailshaft.  Larger axle diameter with more splines + proper 6 bolt flanges.  It's a pain in the arse to use GTR diffs in other cars because of the other things you have to change.  The only reason to do so is if you have very good reasons (cheap access to the stuff you need, particular diff centre you want is only available for GTr type, etc etc).  Otherwise, it's often better to just keep the original R200 housing and put in the mech/other centre you need/want.  That is unless the original diff was from an NA or something and only had 3x2 flanges.  Nothing wrong with those diffs/housings/stub axles/flanges.  It's just the tripod CVs on them that are not as robust/good as the ones on the 5 bolt driveshafts.

[R34GTRSilver]

1 hour ago, Steve85 said:

The truth here is i don't actually know if the GT-4 is the same mechanical setup at as GTR. 
This is where my knowledge starts to run out. At the risk of being an internet jerk, see if you can search here for the data. 

Surely someone else has done something similar before. (crosses fingers on ambiguous advice).

Yeah it’s not easy to research

when the cars in having the engine put in il ask them to check what is R33 GTR, Stagea and R34 so I have s better idea

 

[R34GTRSilver]

21 minutes ago, GTSBoy said:

The front diffs for all the AWDs should be the same.  They are not LSD - they're all open, F160 (I think it's 160) type.

The GTR rear diff is, of course, quite different to the other cars'.  CV joint input on the rear end of the tailshaft.  Larger axle diameter with more splines + proper 6 bolt flanges.  It's a pain in the arse to use GTR diffs in other cars because of the other things you have to change.  The only reason to do so is if you have very good reasons (cheap access to the stuff you need, particular diff centre you want is only available for GTr type, etc etc).  Otherwise, it's often better to just keep the original R200 housing and put in the mech/other centre you need/want.  That is unless the original diff was from an NA or something and only had 3x2 flanges.  Nothing wrong with those diffs/housings/stub axles/flanges.  It's just the tripod CVs on them that are not as robust/good as the ones on the 5 bolt driveshafts.

Thanks for that info. Obviously I want the rear to be as strong as can be 

so is the R33 GTR diff and shafts not the only things needed to upgrade the rear to a GTR 4.1 diff?

If these 3x2 shafts I have aren’t very strong for big power then I will change them if that’s the case

is it a case of them having the car in the air and seeing what I have, then they’ll know what parts il need, to use a GTR diff 

[GTSBoy]

As I said, GTR diff has very different input and output connections.  You change your tailshaft and you change driveshafts.  Essentially you will want/need an R33 GTR rear end to rat the stuff out of it.