Hi.
I'm looking for information regarding the different differentials ratios.

I'm about to be the owner of Automatic 2010 KB4T 2.5 Diesel with 178 HP
This model has traction control, Super-Select system... but no rear differential locker.
There lots of L200 from the same year, with the 136 HP engine version that have an OEM rear differential locker.

Can I take the rear axle from such L200 and replaced with mine? (making the electricity connections to lock is no problem)
how can I tell easily what are the Diff Ratios?
Is there a differences between the 178HP and the 136HP diesels on the diff's ratio?
Manual to Automatic?

Thank you so much !

Ezra