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Clutching at straws, but if thrust washers in actual diff have 'fused' then maybe the diff is locked internally and not as a result of the on/off locker ring. Done any extended slippery driving without the diff lock engaged? Any unexpected noise before this current round of trouble?
Ok tried rear wheel up. Won't do a full rotation (handbrake off). I have the front and back drivers side wheels up now. They spin same direction in unison. Can do full rotations. Centre diff light still on.
Regarding surgery - off with drive shaft, any wires, linkages and bolts. Pulls off with out too much trouble - just a pain. Oh, draining oil might be an idea. Just remember how it all assembles as you pull it apart. Watch for detente bearings incase they roll out - from my experience they should be reinserted from inside the casing before re-insertion of shaft - grub scrw and spring from the outside of the casing. The on/off ring and its fork should be obvious. Inspecting internals of the diff itself require splitting the two halves, and mark the two halves before you pull them as the bolt holes are not uniformly spaced from memory - you'll need torque wrench etc for reassembly.
Hi no unexpected noise but have had trouble disengaging in the past but usually after 20 mins of reversing and swerving it comes good
And you didn't suspect something at this point?Quote:
Originally Posted by synthium
Or did you do the "I'll drive it till it really breaks" trick? I'm known for doing this...
Thanks for all the help but finally came good. 2 wheels in the air. Spinning the back while my mate changed the gear on and out of diff lock and finally it unlocked!
Sorry trundle what do you mean. How can I drive it until it breaks when it disengaged previously. As I said no unexpected noise. Thanks for the positive advice
Just mean that if you've had an issue with it sticking and needing to reverse and swerve around for 20min to get it out several times before then there was an obvious issue, but you seem happy enough to re-engage the diff and continue to use it.
Nothing smart arse intended, as I am happy to drive some with a known problem sometimes, for any multitude of reasons, mearly a question, of are you going to look for the cause, or continue to drive it knowing it will likely happen again?
Be interested in knowing what was causing the sticking if you go down that path.
Cheers
Good to hear you got it unlocked. Before your Iast post was going to suggest one more thing, and it may be worth trying pull (unscrew) the sensor out first in case it is hindering the change mechanism. I'm used to being under Disco so you may have a bit more room for reaching it in a Def. Reach up over the rear of the box and you will feel it by following its wire down, then figure out which ring spanner or open end will fit and unscrew.
Best if you take it apart and find the prob :)
I have had the centre diff fail to disengage before on a long trip out across the Savannah Way. At first it would take quite a few goes, reversing etc, until eventually it would not disengage at all. We were going to be driving on sealed roads for a while, so I had to get it unlocked. They way I got it unlocked (on the grass in front of the Cape Crawford hotel) was to jack up a front wheel to unload the transfer case and then pull and manually turn the lever. I had to do this everytime we got off the dirt roads, had to be careful as the exhaust pipe is very close. The diff lock lever would move across, and would move the lever but not in the right direction.
Turns out the linkage was bent, possibly from something hitting it, or since we started the trip shortly after the dealers had replaced the clutch under warranty, they might have bent it when re-installing the drivertrain.
It was an easy fix, just bent the linkage back again.