Philberto wrote:hmmm.... too bad he's not selling front 3.73 gears too
If you want to switch to 3.73, just get a used front diff out of a wrecked TB for $400, and use the 3.73 gears with the G80 carrier...
If you don't want to change the front out, just put your stock gears on the G80 carrier, and throw the 3.73 gears in the corner of the garage...
Actually, even if you already have 3.73 gears, you'd probably be better off putting your gears on the G80 carrier, because they may not need re-shimmed, as the G80 carriers seem to be pretty consistant with each other and the open, non-G80 carriers... My uncle purchased a G80 carrier for a used 99+ 1/2-ton Chevy, put his gears on it, and put it back together with the stock shims that came in his diff (just on a lark), and the gears meshed prefectly, like they did with the old open carrier (yes, he did the marking spray), and he didn't have to re-shim... Said he'd heard several people say that they didn't have to reshim much or at all when they did this mod... I'm not saying they'll all be like this, but I can't imagine GM shims all of their differentials at the factory... I think they have the process down to a point that the same shims work for everything (of a given ratio) that comes off the line...
Mike