Help with GM part ID#

[JeffHK5]

Bought a bunch of overstock stuff from a local Chevrolet dealer and ran into a part # that I'm having a hard time ID'ing. It's a new GM ring&pinion (4.10) and has a tag tied to it that says it's a "9.5-SF" and the box has a UPC code that says 12471292 . The other local Chevy dealers don't like to just "give out" info without selling me something and I was wondering if CK5 had a resident GM insider. I would like to put it up forsale and not be unsure of what it fits


Thanks for the help
Jeff

 

[clarkjw24]

9.5 SF is the other 14bolt. Its the 14bolt 8 lug simi floater ring and pinion. 3/4 tons had them. They had a 9.5" ring gear vs. the full floaters 10.5

 

[JeffHK5]

I agree with you what it should be is the semi-floater but what I was wanting is someone that can verify that 12471292 part #. I'd hate to sell to some big dude and it be mis-marked

Thanks Jeff

 

[beater_k20]

open the box, and look at the stampings on the ring gear, it will tell you everything you need to know.

 

[sweetk30]

9.5 SF is the other 14bolt. Its the 14bolt 8 lug simi floater ring and pinion. 3/4 tons had them. They had a 9.5" ring gear vs. the full floaters 10.5

dont forget the 88-up 5 lug under the 454ss trucks and the light duty 6 lugs.

 

[rocknutah]

Geared Up

That number supercedes to a 12479360, 4.10 ratio, 1 ton and some newer 3/4 ton applications.

 

[JeffHK5]

So it's not a 9.5"SF if it was in 3/4 and 1 ton diffs? Then what diff is it,14FF or is it a AAM diff? The pinion has three bearing journals like a 14FF. I have had 10.5-14FF's apart but I have never put a tape to a ring gear to see which part of the gear measures 10.5, is it to the tips of the teeth?


Gear is stamped 10 41 079 1


Thanks Jeff

 

[rocknutah]

Geared Up

The part number shows it to be a componant of a 10 1/2 full floater.

 

[JeffHK5]

Thanks much rocknutah , these parts went from the "for-sale" pile to the "to-keep" pile



Thanks again, Jeff