After looking at my window sticker it says performance axle option? HUH what is that i know it has 3.23's and aluminum drive shaft or is that what it means?

 

Without this option you'd have 2.73s and a steel driveshaft.

 

well atleast 273s,i thought all ls cars came with aluminum ds.

 

Doesn't that mean it's the posi axle? I seem to recall that on my window sticker too.

 

all the v8 cars had posi's. Al nailed it on the head, auto's w/o the performance axle (3.23); got 2.73's and a steel DS.

6 speeds were 3.42 only. not sure on the v6's.

 

I won't say for certain you're wrong, but I'm sure I remember in '95 buying mine, there was a choice between open 2.73 and posi 3.23 on the A4. IIRC all the manuals had the posi with a 3.42. Dunno, it was a long time ago

 

Im pretty sure that no 4th gen, v8 cars had an open rear.

But the OP asked about a 98, this is the ls1 section, and I know all 98+'s were what Al said. .

 

Yeah, you're right. I did a search and found the LSD listed as standard equipment for either trans

 

GM did not give anything away, LIMITED Slip rears were a option RPO G80.
It may have been required on certain models but the original owners paid for that option.

 

eh, it was standard equipment on all 4th gen (93-02) V8 f-bodys.

End of discussion.

 

True you paid for it but no v8 4th gens left the factory with an open rear end.

 

I agree, no open rears on the 4th gen V8's. But is was in the MSRP & listed as RPO G80.

 

I don't think anyone suggested it was "free" or that GM was giving them away. One response suggested that buying the "performance axle" meant you got a limited slip, and that was not correct. I think everyone is smart enough to figure out that you pay for all the components that are standard on the vehicle.

 

I would not be too sure about that last remark. Some people are Dumb & Dumber.