Hi All,

Anyone want to help diagnose this?

72' 1200 Ute with a banjo style diff. "grrr" grinding noise in the rear on the car at about 40mph. The grind has a period of about a second. The diff makes no other noise at speeds other than between 35 - 45 mph. The noise continues whether the car is coasting or under load (foot on the clutch and out of gear as well - noise continues).

What say you datsun gurus? Wheel bearings or diff bearings? I'm hoping because there isn't any other whining (its really a low frequency grinding noise) its not the pinion or crown which might be more effort.

Or am I way off? Can universal joints behave like this?

I've just checked the diff oil and its full to the fill hole and seems ok (I've yet to drain it to look for chunks of diff though ).

Just after a rough opinion as if its likely to be wheel bearings I'll do them myself - if its anything more I might just book it in...

Thanks,
Brad