Center Section for 8 3/4 rear end.

[bob32268]

I need a center section from a 8 3/4 Sure-Grip rear end with 3:23 gear ratio. A friend has one I can have but he's not sure if it's a Sure-Grip or Open rear end. Is there any way to tell from markings ? Does anyone have a picture
of them side by side (Sure-Grip and Open) ?
Tks in advanced
Bob32268

 

[dadsbee]

Open is just a group of spider gears and a cross pin, sure grip clutch or cone an enclosed unit. Easy to tell visually...

 

[jimbosride]

8-3/4 rear with 489 case ....sure grip?....decoding the casting numbers?

 

[33 IMP]

If you have the pumpkin out of the rearend housing......
If you can see spider gears, it's open
If you see springs, it a cone style sure grip.
If it's fully enclosed looking, it's a clutch style sure grip.
A 3.23 is likely an open, tho there were certainly sg's. A 3.55 or 3.91 would almost have to be a sg.

 

[bob32268]

If you have the pumpkin out of the rearend housing......
If you can see spider gears, it's open
If you see springs, it a cone style sure grip.
If it's fully enclosed looking, it's a clutch style sure grip.
A 3.23 is likely an open, tho there were certainly sg's. A 3.55 or 3.91 would almost have to be a sg.

Thanks for the info, much appreciated.
Tks,
Bob32268