Differential lock in HL and LL

[MicheleCasta]

I just realized the CENTER differential automatically locks in HL and LL never in H. The knob is only for the REAR differential.

Here’s an overview.

H = high gearing for normal driving on hard ground rain or shine.
HL = high gearing (not as high as H) with automatically LOCKED center differential for “high speed” with poor traction, on snow or mud or gravel maybe. The car in this will feel restrained almost as if it had the emergency break partially on compared to H. (The “high speed” terminology is not quite correct.)
LL = low gearing automatically LOCKED center differential for extreme off road.

This Land Cruiser is a full time 4x4 and I’ve done trails steep to a level that only a quad could do simply on H. So these other gearings are really for EXTREME EXTREME situations and going straight. The differential lock can cause extreme harm to the transmission if not used for what is intended.

 

[Towpack]

Welcome to the forum.

 

[karl2000]

Think its the centre diff that locks not the rear

 

[BobMurphy]

That switch is for the rear axle locker - the centre diff lock is in the Transfer Box and is engaged manually, via the Transfer Lever.
See previous thread.
Bob.

 

[MikeJak]

as others have said, they do different jobs, the transfer box gear selector locks the centre lock, the switch engages the rear diff lock. the centre lock locks the power distribution going to front and the rear axle (40/60 I believe) the rear lock locks the axle at the rear diff so if one rear wheel doesn't have traction all torque is not sent to that wheel but it is still distributed 50/50 to each wheel