factory diff lock VS shimmed LSD

[BrodieTiGQ]

So I have a GQ TI and have a factory rear diff lock , the diff lock doesn't work and I haven't looked into it (probably something simple) but anyways, the gear ratio is 3.9 and I have another set of diffs (4.11 ratio) with the rear LSD which I have shimmed with a 0.55 shim

My question is which is the better option? should I keep with the factory locker and sort out why its not working or swap it out for the limited slip?

im intrested to hear your thoughts!!!!

post edit:
I should probably add its a td42 turbo manual 33's

[MudRunnerTD]

Swap out for the better ratio and the LSD is great in the Patrol. Go the front locker while you swap out.

[the evil twin]

X 2 ^^^^

[BrodieTiGQ]

yep thats what I've been told , I was also thinking that having the LSD will be better for towing also