I went to have a look at an IFS diff a few days ago, the owner can't remember what model/year/ratio it is, it's also been sitting for quite a while. All I need it for is to salvage the ring and pinion if it's a 3.727 ratio. Turned the pinion shaft to try and decipher the ratio and there was no movement in the output shafts. After a while of turning one output shaft the other started turning, but if I held one still while turning the other I still had no action at the pinion. Is this normal for a front diff? I've never encountered this on a solid rear.