What Diff Fits Into S15

[toy515]

hey guys im looking to replace my diff on my s15 ive done the 26 conversion with 25 box, i was wondering what diff is a direct replacement? would gtr diff gears fit in? i wanna make it a 4.1 or a 4.3?

[SteveL]

hey guys im looking to replace my diff on my s15 ive done the 26 conversion with 25 box, i was wondering what diff is a direct replacement? would gtr diff gears fit in? i wanna make it a 4.1 or a 4.3?

S15 uses R200 rear diff like GTR, GTSt etc. One big difference is that the S15 uses a single sensor on the pinion for rear ABS.....the rotor is mounted on the pinion shaft and the pick-up is mounted on the nose of the diff, just behind the tailshaft attachment. Essentially the S15 ABS is a three channel system, while GTR is 4 channel (GTR has individual sensors for each wheel). What this means is that you can't just bolt a GTR diff into an S15 without disabling the ABS. It may be that a GTR CWP will fit an S15 diff housing but the GTR pinion probably won't have the ability to mount the S15 ABS rotor (although it might be possible to modify the pinion to do so).

[TriniGT]

I tohught the GTR R33 had the same setup with threechannels unlike the four with the R34.. I am removing the ABS setup in my S15 for my RB26DETT conversion.

[SteveL]

I tohught the GTR R33 had the same setup with threechannels unlike the four with the R34.. I am removing the ABS setup in my S15 for my RB26DETT conversion.

As far as I'm aware R33 GTR uses 4 channel ABS like R32 (as does R34 GTR). The main difference between R32 GTR and R33 is the active LSD.

In fact I just checked in FAST and there's no sensor in the nose of the diff like found in S15.