Rear end ratio.

[commando1]

I don't know if you could check that box when ordering a C-body.

I got curious so I picked '70 Fury at random. I'm not gonna go 65-78

 

[polara71]

Like I said. .....

 

[Doug]

2 tags on a '68???

There's two tags there. One is half off , rivet rotted.
Looks all original but 50 years is a long time

 

[Doug]

If there's an 8 under the X on the second line up from the bottom then it has a SG.

I will check thank you, I still will lift the rear at least and see if both wheels turn

 

[BIGBARNEYCARS]

3.91 SG was not out of the ordinary. There was an A31 high performance axle package in '69-'71 that was 3.91 SG.

My A-100 5 window came with ah /6+727 W/ ah 391SG in it. @ 3600 RPMz+ah bit you could get it all the way up to 53-55 MPH and it would chirp both tirez off the line and thru 2nd and 3rd! BTW, It did the same chirp noise when I swapped in ah 276 SG but it did it @2750 RPMz And it wouldn't top out 'til 'bout 85, lol

 

[Dads300]

My 65 NY'er 2 dr hdtp with 413 had a 2.76 suregrip. That car was loaded though, they probably just checked boxes to make it more expensive.
Travis..

 

[Snotty]

Wasn't 3.31 or 3.55 as low as you could go on a S/G?

No. It's not factory but I'm running a 2.73 SG in my Newport. I am also running a 3.23 SG in the Gremlin.

 

[commando1]

No. It's not factory but I'm running a 2.73 SG in my Newport. I am also running a 3.23 SG in the Gremlin.

When talking rear end ratios, a "lower" ratio means a higher number.
3.55 is "lower" than 3.31.

 

[twostick]

It's all a toss up . Odds? Not sure of the odds but small engine cars even came with sure grips.

The 3.23 SG 741 case I have in my 66 came out of a 66 /6 Polara. The original was a 2.76 SG, also a 741 case.

Kevin

 

[polara71]

The 3.23 SG 741 case I have in my 66 came out of a 66 /6 Polara. The original was a 2.76 SG, also a 741 case.

Kevin

And we all presume they came with the big engines. Truth is you gotta look at them all

 

[Snotty]

When talking rear end ratios, a "lower" ratio means a higher number.
3.55 is "lower" than 3.31.

I always confuse that....