8 months ago a local speed shop installed my 3.73s. Took them 5 days but it only costed me $340. Now, whenever there is a load on my car, it makes a crazy whining noise. That noise goes away as soon as you put the clutch in or let off the gas. Brought it to the shop and they checked it out, adjusted the backlash twice and now their saying my gears wore wrong and I need new ones.They say it can be a number of things and it wasnt because of a bad install. He says I might have too much horsepower for the ones installed(richmond) and I need to upgrade to something else. What do you guys think about this? I was thinking since I pretty much have to pay them to do all that work, I might as well upgrade to maybe some stronger axles or a Aubrun locker or sometinhg. What would I need to do that and what do you think of my gears going bad like that?