with my d21 (same diffs really)
i smashed the crown-wheel trying to climb things.
next one in was a welded one...pretty much second time out, same shit, crown-wheel teeth.
previous to my d21 i had a MQ patrol, after getting stuck lots i welded the front diff in this and never had an issue.
With welded you could use 1st low and climb climb with no need for power or speed.
welded had no give, so steering allways wanted to return to center regardless.
with manual hubs i just left the passanger side on, did normal driving...coming up to something hard i locked the drivers side...annoying yes, but not as annoying as driving with the constant RTC of the steering + your turning circle goes out the window to.
why am i blabing on about this? background for the lokka.
so now i have a d22 and knowing the navara can be verry ill equiped off road, once of my first mods was a lokka.
i say ill equiped, as when your driving with an unloaded rear, it will allways bounce and lose traction, meaning your nice LSD diff means nothing, as you have no grip.
with the fron only doing singles, as soon as its in the air, game over, no longer moving.
anyway
Lokka - 1st time i had it in it was not installed correctly and it was exactly like a welded diff (ohnoes). but out it came and in it went correctly adjusted.
now i hope you understand how the lokka works
- both wheels locked, unless one has enough force to overrun the other, in whitch case it can spin faster than the other - but its not given the chance to spin slower than the input.
Lokka in many way feels like a welded diff on many surfaces.
sand - cool, does pull, turning - both wheels same speed, has a tendicance to dig in your inside wheel...could get you in trouble, but as you have positive traction you do need to power out. otherwise, much much the same....you dont notice the RTC steering afect so much, unless you boot it, whitch case you will in any terrain.
lose surface, once again much the same as sand, the more solid the surface the more RTC affect you will get.
less lose sand, you will get more of a RTC feel, however on turning, your wheel has enough grip to over run the diff and is way way better to turn corners (remember comparing to welded)
bitumen, i only tried to corner once, yes the overrunning allowed the car to turn, but it was still 4 wheel positive traction and the car was fighting itself F/R more than it would normally...not recommended to have engaged on good traction surface anyway.
so in summary, the lokka will allow your nav to go places, with positive traction, so you do not need speed.
in theory if your not using speed, its way harder for you to break a CV. i have never broken one yet, so i don't know much here.
I say the lokka is a great addition for the regular off-roader on a budget, as it will transform your cars ability's.
obviously the best thing would be some sort of E/air lokka that you can turn on and off from inside cabin, so you can have proper turning ability then 100 positive traction on demand....but given these systems are still 3-4 times the lokka cost they arent allways obtainable for everyone.
- my thoughts.
