New Rear Diff, need recommendations...

7milesout said
A 4 speed transmission (at least in this case) would include a 0.67 OD. So yes, the rpm would drop. 3rd gear would remain 1:1 as it is now.

That’s a 4 speed overdrive transmission then. The standard 833 is like every other non-overdrive 4 speed out there, 1.00 in 4th.