Thanks for the reply.
I can get a used diff for $1400. Supplier says 12months warranty but only if installed by a qualified mechanic...and I will need to tell him who is installing it.
Doesn’t look like a particularly difficult job..but I’m not certain.
A mechanic friend said he’ll install it for $700....so maybe I’ll just get him to do it.
I HATE having to get someone else to work on my vehicles....I always do my own.