2018 1500 rear axle swap 4.3l 8.6" on to 5.3L 9.5" any reason I can't?

[doubeleive]

I am trying to find out if a 4.3l 8.6" rear axle can be swapped onto 5.3l with the 9.5" or if there is any reason a swap could not be done or if any modifications will needed or if it is a simple swap? do i need the axle also? any change in the u-joints or pinion connection? brakes?

reason being I have the 9.5" 12 bolt 3.08 and there are no lockers available other than the stock gov-bomb

with the 8.6" 10 bolt 3.42 I can go with the tru-trac or maybe even a arb

thanks for any experience or guidance ahead of time.

[silveradosid]

if you are swapping the complete axle, then yes the brakes and u-joints are the same. you cannot just switch the inside parts because they have different size bearings

[rlcole321]

That doesn't make since, I watch an episode on Power Nation (Truck Tech) where they converted a 12 bolt carrier from single to a posi unit, I think it was a True Lock.

[M1ck3y]

Why?