Rear end limits

[Joe 1320]

Manufacturers will cut costs wherever they can to make more profit. My guess is that it would cost between 50 and 100 dollars for a manufacturer to go from the puny 7.5 to a decent 8.8. It would be nice to at least have the option to upgrade. My guess is that they would charge about 10 times what it cost them or about 500 - 1000, if they even made it available. You are thinking aftermarket prices not the manufacturing level. You would still get the cheapest Posi and axles however.

Perhaps, but you have to remember that fuel economy and weight savings were more of a priority than having the rear be able to withstand another 100 HP and 4K rpm clutch drops. Those beefier rears also take more power to turn.