for mechanical auto diff lockers, i don't think that they would work properly, don't forget that LOKKA diff locker affects on you streering, in all time drvind, but ARB diff locker affects on steering only during locking process (very short time), so I think it's better to have ARB diff locker (I have ordered one for my front axel, it's C200), & I will use it on my MQ with Z24 engine...!!!!

Well steering is only affected when you are in 4wd. with a mechanical locker it only locks up when torque is applied so when in 2wd the front should not be locked up.

With a selectable locker you have the ability to turn on and off the locker so you can steer. Using the a selectable locker this way is just a band-aid. If you are going to lock the front look into investing in hydro assist.

Well I would like an ARB too but price is a huge difference.

For steering I would just unlock my hubs.

The site says its always locked and somehow when turning the torque and speed change is different from having a loose tire, so it unlocks.

The questions is still, is it available for a rear C200?

I haven't seen any mechanical diff locker, but I think that it wouldn't need any change in diff casting cover, so I think that it would be available also for rear C200 diff, But the best way to check it out is to get in touch with LOKKA diff locker supplier.
One thing, check with DETROIT diff locker, as I know it has got lockers for GQ/GU series, so I think that it will be available for C200...!!!

i will ask if it will work in the rear.i was quoted 430 us delivered to my house in alaska.

don't forget to inform us the results.....