Well, this isn't all confirmed yet but my builder has my transmission & was getting a LSD diff installed because my stock one broke. Basically without getting into a long story, I thought I had a GSR tranny & he's saying its a LS but someone put an GSR Diff in it which we all know shouldn't be there. I simply, for right now need to know if a GSR Diff can fit into a LS or rather can a LS ring gear fit onto a GSR diff. He is saying that he counted the teeth "64/15=4.2666 ratio", which is an LS FD but correct me if i'm wrong but I thought a LS FD cannot fit onto a GSR Diff. Isn't the LS diff physically smaller & the ring gear wouldn't swap over to a gsr?

 

the LS ring gear will not fit a GSR diff.

you must have a LS tranny then....

 

Well thats yet to be scene yet because of other details i've left out. I basically wanted to make sure A LS ring gear should not fit a GSR. He's saying though that it was a GSR diff so i dont undestand yet.

 

Ok nevermind that I guess, assuming now I have a straight up LS transmission & I have a GSR LSD that I bought assuming it was a GSR tranny...if I still wanted to use the GSR LSD I would need to get a whole FD kit from a ITR/GSR/CTR? Basically, what do I need exactly to make a gsr LSD fit or will it fit?

Lastly assuming I can do this, how do you think a LS tranny with a JDM ITR 98 spec 4.78 FD do with LS gears? How do you think the gearing will be with the loong LS gears but short final?I'm building a poor man's type r at the moment. Will it still fall out of vtec when you switch gears drastically?