Originally Posted by dthem370

It all depends on how cheap you can find a manual 370Z differential. I got lucky and got one for a little under 400 bucks. As far as the rest of the stuff goes, here is the approximate amount they cost.

Gears (4.08s)= $535
Install kit = $300
Fluid = $30
370Z manual diff = best price you can find one for
Labor/install = $500, depends on your local shop.

So you are looking somewhere around 1400 +tax and whatever price you can find a used/new manual 370Z diff.