z28LS1

iTrader: (1)

I have ran my Camaro with excessive backlash in the rear end. The gears wine like its a semi. I was going to just buy a rebuild kit and redo the rear end gears. Right now it's all stock and I have 3.23's from the factory.. I was thinking getting 3.73's.. It's an automatic (3 speed + overdrive). It's my daily driver and I was wondering if going from 3.23 to 3.73 would effect gas mileage that much. I use this car on the highway a lot and didn't want to really effect the gas mileage.. What do you guys think? I figured if there wasn't much difference between 3.23 to 3.42 or 3.73... i'd just get the 3.73's... The gas mileage difference is the main concern... Let me know!

SVT THIS

iTrader: (27)

I would swap to 3.73s. I don't imagine it would go down all that much. You could post it over in the gear section:

https://ls1tech.com/forums/gears-axles-15/

They could probably help you out a lot there!