went to "top up" my diff with some heavier oil (had a little clunking on taking up the backlash and couldn't decide whether this was not having a cush drive or just slightly worn diff or using superlightweight oil)
Ended up putting almost a whole container full of redline in it.
No sign (at all ever since I build the car) of the diff oil leaking anywhere. No sign of leakage out of the bearings. But it must be going somewhere!!
On a related note, how do you tell when a diff is shagged?
