Front Diff, Centre Diff and Rear Diff lock problems J80 series

[cruiserdriver]

Your "landcruiserclub" site looks good ! I looked for a suitable open topic but couldn't find one. I will open this topic where we can discuss the J80 Front Diff, Centre Diff, and Rear Diff.

I have an HDJ 80 from 1990 5 speed, and it is equipped with Nordic countries (Denmark, Sweden, Finland, Norway and Iceland) options such as 3x axle locks and an additional heater and so on. Diff Locks are needed because a lot of snow can fall in winter.

The Rear lock light was flashing and I changed the sensor but the fault did not go away. The lock turned on, which was fine, but the flashing was annoying, so I thought of replacing the whole lock motor. I believe that the lock motor is original and has never been replaced so that is over 35 years old!

The question is whether the REAR Diff needs to be ON if I take the lock motor off or not?

 

[frank rabbets]

Your motor does not appear to have much corrosion. They are easy to strip, clean and reassemble.

 

[cruiserdriver]

Your motor does not appear to have much corrosion. They are easy to strip, clean and reassemble.

Ok, thank you. I have already bought a new Diff Lock motor. I just don't know if I can pull the old Diff Lock motor out without the lock being turned ON or not.

 

[Towpack]

The procedure in the FSM is for the actuator to be locked prior to removal then unlocked after refitting.

 

[felix2566]

Assuming your diff is unlocked currently, I would plug your new actuator into the wiring loom, but not connect it mechanically, make sure the pin moves when you turn it on and off. Then you will know it's in the right position before fitting it to the axle. Plus can confirm that its working.

Reading your description again you said the lock turns on but the light keeps flashing.

If that's the case, I think the signal from the position switch is not being read by the car. Are you sure the wiring is ok from the switch. Mine was rotted away. I have spare plugs and repair wires if you need them.