which rear end?

[Veltboy618]

How do i tell which rear end I have?

 

[v8power]

how do i tell what kind of car u have?

its most likley a swiss cheese 7.5 with a one tire fire lol.

 

[Veltboy618]

Sorry about that. its a cutlass & that sounds like it

 

[v8power]

lol no problem. what are your plans for the car? if you want to make any decet horse power i would recomend not sticking any money into it.

 

[Blake442]

What year is your car?
The gear ratio is listed on the RPO label under your trunk lid on '84-up cars.
Earlier cars you can find it on the build sheet, if you can find the build sheet, or if there's anything left of it...

Also, depending on how rusty it is, there are numbers stamped into the front side of the passenger side axle tube.

 

[STL84Calais]

What exactly does the rpo label look like???

 

[dan2286]

What exactly does the rpo label look like???

Its just a sticker with a bunch of codes on it. It is in plain sight, you cant miss it unless someone took it off.

 

[STL84Calais]

ok..... which code tells me the ratio?

 

[pontiacgp]

take the cover off....it sounds like it's ready for a gear oil change anyway...

 

[pontiacgp]

ok..... which code tells me the ratio?

it'll be a G (letter) (number)

except if it's a 214....G72