Reduction Gears

[jay see]

I'm also thinking of doing this ahead of a front locker install as it would provide more control during decents and over obstacles.

I found the combination of larger tyres (33) on the manual tb48 to be a little to quick in low 1st.

Just to confirm this shouldn't impact high range performance at all, right?

High 4, no. The gears are for low range they go in the transfer case.
If I'm wrong someone will correct me.