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I want to get 3:73 gears. I don't know anything about carriers, or open. How do I know what to get? I'm in the middle of any engine swap, and was told that the donor car that i'm using for the swap has 2:73's and no posi. It's a 97 z28. Right now I have the 3:08's in my 97rs vert. I just don't know what to get when I see 2 and 3 carriers, and an open carrier? This is where I get lost. Any help is appreciated to learn how to know what I need. TIA
Shawn
1997 Camaro RS Convertible<br />White w/black top, factory chrome rims <p>Mods so far: Borla catback, Catco high flow cat,CAI,2 point STB,painted calipers and drums with caliper camaro decals,GTS blackout all the around,5% tinted windows all the way around,Streetglow red neon lights inside and under, raised camaro fill in decals on the rear, 30th anv decals, and a nice stereo system<br /><a href=\"http://www.cardomain.com/member_pages/view_page.pl?page_id=275528\" target=\"_blank\">http://www.cardomain.com/member_pages/view_page.pl?page_id=275528</a>
an open carrier lets one wheel freewheel while the other is spinning in the desired direction.
a limited slip type senses slippage in one wheel and transfers power to the other and they both spin at the same time.
2 and 3 series refers essentially to the size of the carrier... the higher your ratio, the thicker your ring gear is and your carrier has to correspond with that. 2.73 and 3.08 2 series carriers work for those thin ring gears but once you move above that (3.23, 3.42, 3.73, and up) you have get get a 3 series carrier.
an open carrier can be either series of carrier, if that's what you're getting at. for anything serious in our size 10 bolt, though, the desired carrier is a 3 series limited slip, whether it's auburn/eaton clutch type or torsen gear type.
Thanks for the detailed info RallyRed. So is posi the same as lsd? I hope I don't sound stupid, but I haven't explored in this area yet. And for me to get 3.73's, I need to start looking for them with a 3 series carrier then, right?
1997 Camaro RS Convertible<br />White w/black top, factory chrome rims <p>Mods so far: Borla catback, Catco high flow cat,CAI,2 point STB,painted calipers and drums with caliper camaro decals,GTS blackout all the around,5% tinted windows all the way around,Streetglow red neon lights inside and under, raised camaro fill in decals on the rear, 30th anv decals, and a nice stereo system<br /><a href=\"http://www.cardomain.com/member_pages/view_page.pl?page_id=275528\" target=\"_blank\">http://www.cardomain.com/member_pages/view_page.pl?page_id=275528</a>
1. posi is pretty much the same as LSD... posi is just the trade/market name for GM's LSD
2. yes, you will need a 3 series carrier for 3.73s, but that is the type you will most likely find. in fact, there's one for sale in the for sale section of this site right now.
yup...that pretty much sums it up...if you cant find what you're looking for there...try www.ring-pinion.com ...those guys are REALLY good...gears and diffys are pretty much all they do and pretty much have anything for any application
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