I know this sounds pretty dumb but how can you tell what your axle ratio is? I have looked in the book and everything but can't seem to figure it out. If this helps i have a 2000 5.3 2wd

 

stock is 3.23, 3.42, or 3.73 on 2wd adn a few 4wd came with 4.10s from factory

2500hd and 3500hd came with either 3.73 ro 4.10 from factory

most go for 3.73s or 4.10 when doing gear swaps

is this what your looking for or something else it kinda sounds like you want the ratio numbers explained

please explain a little bettter

many people on here go with 4.10s and say its their favorite mod

 

Sorry about that i need to be a little more clear, what im asking is how can you tell what your stock ratio is(the ones that came with our trucks? How do i find out? Just trying to find out where i stand before i do anything kind of mods.

 

there is a white sticker in your glove box that tells some of your option codes
i dont know them off hand but ill search for them and ill post when i find them go look and tell me what codes you have and ill figure out the rear end

probably 3.42 but check anyways

 

Look for the more common ones:
GT4=3.73
GT5=4.10 (most likely not on yours)
GU6=3.42
G80= Locking rear axle

 

those are the ones i was lookin for

i forgot to put the g80 but he probably knows by now if he has a posi or pegleg-no offense

 

i have 3.42s in my 07 z71 and dont know why but i do and im going to change to 3.73s in a couple of months

 

Ok it read GU6 G80, so 3.42 locking rear axle. Thanks for the help crew.