I've got an XG Ute with a fairly stock 6cyl, and a T5 Manual, and a 3.27 LSD, trouble is, in 4th gear, at 80km/h, it's doing around 2000rpm, and at 80km/h in 5th it's lugging a bit. I know that 2000rpm is not a problem, however I feel like it could do with an extra gear between 4th and 5th, what will be the effect of changing the diff ratio to 3.45?

Gab

i have an auto AU with diff change from 3.23 to 3.45 ..... couldn't be happier with the change. not sure how the manual EB will go tho?