Hi all, I am having a problem with a rumbling vibration coming from the rear end. Up to about 60 KPH its not noticiceable but gets steadily worse through 80 to 100KPH, (and beyond). When I push the clutch in and roll at these speeds it seems to get worse. I have swapped the tail shaft, thinking it might be out of balance but there is no change. The tyres are new and have just been balanced.

Any ideas?

Thanks
Geoff.

Tires were just balanced, but were incorrectly balanced, can cause these symptoms.

Ok, thanks David I will try swapping fron tyres with rear and see if this changes anything.

diff on its way out gets my vote

tyres- also what size tyres you running? sure they arent rubbing anywhere?

Hi, thanks for the info guys. Tyres are 13 inch, definately not rubbing. It does feel like its coming from the Diff area. It doesn't feel like wheel bearings. Not sure what to do if it is the diff? Could end up costing more than what the cars worth.

wat car is it ? diff centers are neva that dear on the second hand market ?

Its a 77 ute, but not sure its worth putting in a second hand centre as I could just end up with the same problem, anything I put in would be at least 30 years old.

I just hope I find its something simple?

your not living up to your user name :P

im shore a member would have a good second hand diff for ya ( $50 ) or let ya swap to check if its the problem
its only a 2 hour job

Yes, these Datsun diffs rarely go bad. My H145 is 38 years and still just the same as when new. You can get H165s (as in your ute) from the mid eighties, so only 25 years old

I did have one go low on oil, and it whined, but never went bad, drove it for 10 years after topping up the oil.

Occasionally one will go bad but as far as I have seen it is only when abused (oil level not watch, drag raced, donut-burning, etc).