Originally Posted by Brid
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Hi Bird, it sounds like you are checking the amount of freeplay of the center diff lock?
ie. if have you:
Jacked up one front wheel (so the front diff, axle's etc are taken out of the equation,
Applied the handbrake to effectively lock the rear transfer box output flange,
Put the main gear box in neutral,
Then turned the front prop shaft to see how much rotation you have, there will be quite a lot, >45deg.
All you are checking here is the locking device of the center diff.
Checking the center diff freeplay is very difficult unless you pull it out.
However if you have all wheels on the ground (with the hand brake off), the diffs in the front or rear axle (depending on the prop you are swinging on) should stop the prop shaft rotating well before 45deg.
I'd be more worried about the steel you have found in the oil! My guess is that bronze is most likely from the "thrust" washers behind the gears in the center diff assembly. When I pulled the transfer box in my county apart 3 of them had gone completely.
Cheers,
EDIT: I've just re-read you post, if you are checking the prop movement with the wheels on the ground, and you are getting that much rotation, I'd be checking out your diff's, drive flanges, axles etc.
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