I have an 8.25 axle which came with a 4.10:1 sure grip, but I'd like to change to a highway gear and keep the sure grip. Can the same sure grip carrier in the axle be used for both size ring gears?
Yes but there is threshold where I believe the carrier size changes. I believe it's 2:76 but if you do a search for 8 1/4 carrier on this forum you can confirm that size.