I have a nos sure grip differential no 18-05-039-903 I am confused on what gears fit this? I have a set of 3.55 to put in the old carrier with this diff. Any foreseen problems?
I cannot tell from those numbers. I was gonna say if it is an 8 3/4 any gear will bolt on as there is no carrier split. There is a carrier split however, with the 8.25. I am not sure where the split is, either. Maybe someone else who knows for sure (with a better crystal ball) will chime in. lol