For a full rebuild that price I'm guessing would probable be right.
Check out my Auto rebuild thread, I have listed some of ( not all ) costs there: http://www.nissanpatrol.com.au/forum...earbox+rebuild
Will also give you an idea of what is involved in a full rebuild.
If i was in your position again, I would ring Wholesale Auto's and get a price on an exchange gearbox and then see how much a mechanic will charge you 2 fit it, unless of course you have the time 2 do it yourself
Cheers
Todd