posi identification

can someone please help me id this posi please?
gear ratio is 10 41 i think its 410s my dad thinks its 411s im not sure. came out of a 69 camaro. not sure if it was stock or not.







any help would be appreciated.
Lonnie

 

Looks like 4.10's to me.

My example. 16 41, for a 2.56 ratio.

 

any idea what kind of posi that is? i am looking to sell it but i wanna know what it is first?

 

its an Eaton posi..factory GM...it just happens that 10 bolts have ten ring gear bolts, and 12 bolts have 12.....
if its a 12 bolt $350
if its a 10 bolt $250

 

thanks ! thats what i was needing to know

 

The casting #EDB-30174 is a GM 12-Bolt 4 series posi carrier. It appears to be a standard unit. The posi units used in COPO cars had larger side gears, and smaller gears on the cross shaft, thus were machined differently inside to fit the side gears. Were it the HD (COPO) unit, it would be worth considerably more.

 

Sounds like a 4 series posi. Check the spline count on it. I don't know what the possibilities are.

 

1967 october GEAR SET ALSO (67 10)
original GM 4.10 gears (41 10)
Original 4 series posi (30174 casting)
200 # preload springs

Good luck

Jim

 

thanks for the info guys now i get to tell my dad i was right

 

Tell him it isn't rocket science. 41 10 = 4.10.

Devon

 

lol i know but what would the numbers be for a 4.11? the reason he thought that is the guy he got it from said it was 4.11 i clearly told him. the guy is smoking something. i see the numbers...

 

4.11 is a ford gear set...old guys always say 4.11

 

It's like how all the GM bigblocks were 454.

 

right.. ha. chevy people.

 

4.11 would 37 ring, 9 pinion.

 

Chevy gears in the early years were 9 -37 BUT after realizing that the tooth contact was less they gave MORE teeth to make better tooth contact between the the number of teeth that touch at once. 10 -41 More teeth means less heat and more strength.

Jim