Replacement non-clutch pack LSD for the front and rear of your 79, 100, 105 or 80 series.

These are much better than the standard LSD in that they can transfer up to 4 x the torque from the wheel that is slipping to the one that has traction. They work great in all conditions, with the exception of where you might be rock crawling and have one wheel off the ground as the wheel in the air has no torque and therefore nothing is transferred to the wheel on the ground.

In that situation you can apply some brake and this will allow forwards motion.

Better than a locker for most as they always work and have smooth operation so no snappy engagement. Also being constantly engaged its not like the popular e-locker that engage and disengage as go from forwards to reverse.