Re: 3.73 and grs 2
You can run the 5.12's without too much trouble if you know a good machinist. I had the carrier flange turned off giving me a drilled spacer of 5mm. Then had the carrier turned down to 104mm and a 12mm high by 2.5mm thick step heat shrunk onto the carrier to locate the crown wheel. After all of this you only have to set your pinion height and adjust backlash. If you do all of this you wont have trouble with chewing out pinions.
86 LWB 3" Body &suspension, 5.12 gears, Locked F&B