airattack111

iTrader: (2)

I'm planning on upgrading to 4.10 or 3.90 gears here soon.

My question is, do you need an installation kit with both gear sets? And I have a 2000 model camaro ss but it has an Auburn differential. Will I need series 2 or series 3 gears?

thanks!

Tobias05

iTrader: (1)

3 series if it was still stock, but you'll want to pull the cover and check things out since the diff has been changed.

airattack111

iTrader: (2)

Thanks, will I need an installation kit for 3.90s and/or 4.10s?

c0ncEpT

iTrader: (4)

It is always a good idea to change all the bearings and seal when changing the R&P.

HioSSilver

iTrader: (8)

get the 3.90

birdman2447

what sort of mpg difference have you guys seen with 3.91 over stock gears, or dose it not change due to the engine still no having much load? I am stuck between 3.91 or 3.73's but i need to commute with the beast in the summer months.

FirstYrLS1Z

iTrader: (4)

2000 SS M6 would be 3.42s' 3 series with a Torsen 'posi'.
SLP could've removed the Torsen and installed an Auburn,they might have changed the gears too.
Yes,lessening the 'engine load' affects mpg.
My OEM 3.23s' gave me 24.5mpg,my current 4.56s' give me 21.5mpg where, theoretically, they should have given me 17-18mpg. Less load=leaner(but still within factory parameters) mixture=good mpg
3.42s', or some gearset that SLP might have put in,are/would be 3 series.