incorrect diff oil causing clunk?

[darkcat]

i have had the wrong diff oil in (BTR) for about a month, not been using the car much anyway.

i only discovered this after reading through my handbook and discovering the extra bit at the end about the diff...

anyway, is it possible that having this oil in, which is too thin, has caused a bit of a clunk? seems a bit loose somehow...

[bobfather]

The wrong oil will cause the LSD to seize. This will result in a bumping sound and feel when turning at full lock. A seized LSD will not be apparent when driving on reasonably straight roads. If you reverse at full lock you will soon know if the LSD is knackered

[Timja]

Is this a clunk when you are accelerating? Could be worn dif mounts?

[darkcat]

bobfather said:

The wrong oil will cause the LSD to seize. This will result in a bumping sound and feel when turning at full lock. A seized LSD will not be apparent when driving on reasonably straight roads. If you reverse at full lock you will soon know if the LSD is knackered

oh crap.

i have heard a clunk while reversing, well more of a sharp, painful metalic crunch....

I have just jacked one side up and turned a wheel, so the diff isnt permanently seized, hopefully i have caught it in time.
if it has, is it saveable? theres no way i can afford even a recon diff at the mo....

[bobfather]

Saveable, don't know. People usually replace them with a salvage part or have them serviced, the latter is often more expensive but it comes with a guarantee. I would do some more work to confirm the LSD is goosed before jumping to any conclusions