Which performance mod to do?!?!

Ok, tax return time. I was thinking of changing my gears to 3.73. My car has a stock 4L60E tranny in it, what are the stock gears on that? Will I notice a big difference?

I was thinking of doing that + a tune for all my mods, will I be seeing a big difference?

you'll hafta look at your rpo sheet to find out what your stock gear ratio is. if you have 3.42, you'll notice a bit of a difference, if you have 2.73, you'll notice a LOT of difference.

GU2 : AXLE REAR, 2.73 RATIO
GU4 : AXLE REAR, 3.08 RATIO
GU5 : AXLE REAR, 3.23 RATIO
GU6 : AXLE REAR, 3.42 RATIO
most likely it will be one of these

That's in the VIN, or where again?

on 4th gens its on the inside of the drivers door....not sure about others...on my 92 it was in the hatch area i believe

Where are you guys getting this done? I just asked one shop and he said it would be $600-$1200 and I called Aamco and they told me $881! I thought this was a $300-$400 job tops! Also, what do I say when asking if they do it. Is it the differential gears?

Why not do it yourself? Theres a few members here that have done it themselves so you'd get some help there, and it'll cost you nothing except some time.

its in my glove box in my 95