3 or 4 series carrier diff?
Thread Starter
Racer
Joined: Jul 2008
Posts: 323
Likes: 18
3 or 4 series carrier diff?
Hello
Just bought a extra posi-tration to my -72 vette.
The posi now got a 3,55 gear, but on the case there is some ID numbers. And it says. 2 AP L10 4 67. It is a 1967 axle whith 4,11 gears original.
But how do I know what carrier I have now? Original I think it was a 4 series because the 4,11 gear, but now it has 3.55 gear, and I want to know what carrier I have now.
What should I measure to find out what carrier I have now? How should the measure numbers look like?
Thanks
Just bought a extra posi-tration to my -72 vette.
The posi now got a 3,55 gear, but on the case there is some ID numbers. And it says. 2 AP L10 4 67. It is a 1967 axle whith 4,11 gears original.
But how do I know what carrier I have now? Original I think it was a 4 series because the 4,11 gear, but now it has 3.55 gear, and I want to know what carrier I have now.
What should I measure to find out what carrier I have now? How should the measure numbers look like?
Thanks
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
You should have a 3 series carrier. The 3.55 gears would not fit on a 4 series carrier. It can go the other way. 4.11s on a 3 series. Either a spacer or a set of gears with a thick ring gear. If it is truely a 3.55 you have a 3 series carrier.
Thread Starter
Racer
Joined: Jul 2008
Posts: 323
Likes: 18
Tech Contributor
Joined: Aug 1999
Posts: 15,175
Likes: 3,985
From: Connecticut, USA
The 3 series flange is .328 between the flange and RG bolt pad.
If you have a 67 posi case, check it real good. Those are square window posi's and prone to cracking more then the later tear drop windows. Also if a stock 67 it will have the weaker 10-18 spiders the later(71-79) have the better 10-17 spiders.
If you look up my threads you'll find all you want to know about vette posi's.
Good luck
If you have a 67 posi case, check it real good. Those are square window posi's and prone to cracking more then the later tear drop windows. Also if a stock 67 it will have the weaker 10-18 spiders the later(71-79) have the better 10-17 spiders.
If you look up my threads you'll find all you want to know about vette posi's.
Good luck
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
I sold the 4 series carrier a while ago but still have a 3 series in the basement if you need any measurements from it.
