Help ID this Posi Unit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Stepside · 03-25-2002, 09:22 AM

Hey guys, Is this a 3 or 4 series carrier?

*Fast68Chevy* · 03-25-2002, 10:46 AM

5 1/4" on a 3.73 carrier i have here where your 5.3" measurement exists, thats with bearings installed, but they appear ot be flush with the hubs they are pressed on, so...
3866116 is the casting number on it

what year is that one, may be a gov lok...

[This message has been edited by Fast68Chevy (edited March 25, 2002).]

Stepside · 03-25-2002, 11:05 AM

Thanks for the reply Fast. I don't know what year it is. The guy I got it from said it is an Army surplus NOS unit. The casting number on it is: 30060, and has Armasteel cast on it too.

*Fast68Chevy* · 03-25-2002, 11:17 AM

interesting,
see if you can get that date code casting oright there off it and type it out

[This message has been edited by Fast68Chevy (edited March 25, 2002).]

Stepside · 03-25-2002, 11:19 AM

22 between the "screw heads"

72chevyLWB · 03-25-2002, 01:11 PM

That isn't a Gov Loc. If that is for 3.73 or higher I will buy it from you if you want to sell

Stepside · 03-25-2002, 06:46 PM

72chevyLWB, I'll keep you in mind if I ever find out which carrier it fits.
Stepside

Dual quad · 03-25-2002, 09:36 PM

Step, that unit looks to be an Eaton posi. I have some dimensions listed below that should help to identify a 3 versus 4 series carrier. Take the dimension between the ring flange face (where you have it) and the closer bearing seat. This is the opposite bearing that you have referenced and the dimension taken at the seat, not end bell. I would say that what you have is probably a 4 series unit (3.73 and up gears).

3 series – 0.895”

4 series – 1.145”

[This message has been edited by Dual quad (edited March 25, 2002).]

*Fast68Chevy* · 03-26-2002, 01:08 PM

yeah, i measure 48mm on this 4 series carrier here, thats right at about 1 1/8" which is close to 1.14"

date code wil be a letter and then two or three numbers

------------------
-71/C-10(thx teeitup and crews!)350 4+4/CH465(thx 71Chev, GMCPaul, and CPNE)longfleet bed(thnx meathead95)!still building it-
-'84 Z28(Z28) 1G1AP87GXEL100000 with H.O. 305/4bbl/190net/hp(L69) 3.73 rear(GT4/YC4) 700R4(MD8-MXO) & other goodies

-79 G20 pass van, 350/th350/10bolt,
paint is overrated
Randy- Lincoln, IL

r68c30@hotmail.com
© RSS Enterprises 2000

Stepside · 03-26-2002, 06:46 PM

Dual quad, I measured the dimension you gave. I got 1.150. This was holding a straight edge and using calipers,(and being anxious). I now know what I have.

You were right, 4 series. I appreciate the help from you and Fast68!!!!
72chevyLWB, looks like I'll keep it...
Stepside

71GMC 4x4 · 03-26-2002, 08:13 PM

I agree with Dual Quad, That looks like an Eaton posi unit to me. They come with green springs, I have an eaton unit and it also has Armasteel casted into it. As far as what series I can't help you there.

*Fast68Chevy* · 03-26-2002, 08:19 PM

that carrier just looks wierd ot me is all, it doesnt look so much like the unit i pulled out of the 72, it had smaller springs, and four of them inside those tow spring plates, and was 72 dated, so,,

he gonna keep it now, hehehe

good luck!

*JeffSpidy* · 07-04-2008, 03:41 AM

Quote:

Originally Posted by Stepside

Hey guys, Is this a 3 or 4 series carrier?

hello!

caminokid · 07-04-2008, 06:58 AM

Quote:

Originally Posted by JeffSpidy

hello!

Bored are we?

03-25-2002, 09:22 AM	#1
Stepside Gasser Join Date: May 2000 Location: Thomasville,NC USA Posts: 456	Help ID this Posi Unit Hey guys, Is this a 3 or 4 series carrier? __________________ :thud 70 sstep tubbed, Muncie, double hump, snowflake,

03-25-2002, 11:05 AM	#3
Stepside Gasser Join Date: May 2000 Location: Thomasville,NC USA Posts: 456	Thanks for the reply Fast. I don't know what year it is. The guy I got it from said it is an Army surplus NOS unit. The casting number on it is: 30060, and has Armasteel cast on it too. __________________ :thud 70 sstep tubbed, Muncie, double hump, snowflake,

03-25-2002, 11:19 AM	#5
Stepside Gasser Join Date: May 2000 Location: Thomasville,NC USA Posts: 456	22 between the "screw heads" __________________ :thud 70 sstep tubbed, Muncie, double hump, snowflake,

03-25-2002, 01:11 PM	#6
72chevyLWB Got 20's???? Join Date: Oct 2001 Location: Aberdeen SD Posts: 1,451	That isn't a Gov Loc. If that is for 3.73 or higher I will buy it from you if you want to sell __________________ 99 Silverado Ex-Cab 2wd, Bagged&WhippleCharged 02 Sierra Ex-Cab 4wd 2500 HD The 72 went down the road.

03-25-2002, 06:46 PM	#7
Stepside Gasser Join Date: May 2000 Location: Thomasville,NC USA Posts: 456	72chevyLWB, I'll keep you in mind if I ever find out which carrier it fits. Stepside __________________ :thud 70 sstep tubbed, Muncie, double hump, snowflake,

03-25-2002, 10:46 AM	#2
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	5 1/4" on a 3.73 carrier i have here where your 5.3" measurement exists, thats with bearings installed, but they appear ot be flush with the hubs they are pressed on, so... 3866116 is the casting number on it what year is that one, may be a gov lok... [This message has been edited by Fast68Chevy (edited March 25, 2002).]

03-25-2002, 11:17 AM	#4
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	interesting, see if you can get that date code casting oright there off it and type it out [This message has been edited by Fast68Chevy (edited March 25, 2002).]

03-25-2002, 09:36 PM	#8
Dual quad Smell that burnin' rubber Join Date: Sep 2000 Location: Ontario Posts: 171	Step, that unit looks to be an Eaton posi. I have some dimensions listed below that should help to identify a 3 versus 4 series carrier. Take the dimension between the ring flange face (where you have it) and the closer bearing seat. This is the opposite bearing that you have referenced and the dimension taken at the seat, not end bell. I would say that what you have is probably a 4 series unit (3.73 and up gears). 3 series – 0.895” 4 series – 1.145” [This message has been edited by Dual quad (edited March 25, 2002).]

03-26-2002, 01:08 PM	#9
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	yeah, i measure 48mm on this 4 series carrier here, thats right at about 1 1/8" which is close to 1.14" date code wil be a letter and then two or three numbers ------------------ -71/C-10(thx teeitup and crews!)350 4+4/CH465(thx 71Chev, GMCPaul, and CPNE)longfleet bed(thnx meathead95)!still building it- -'84 Z28(Z28) 1G1AP87GXEL100000 with H.O. 305/4bbl/190net/hp(L69) 3.73 rear(GT4/YC4) 700R4(MD8-MXO) & other goodies -79 G20 pass van, 350/th350/10bolt, paint is overrated Randy- Lincoln, IL r68c30@hotmail.com © RSS Enterprises 2000

03-26-2002, 06:46 PM	#10
Stepside Gasser Join Date: May 2000 Location: Thomasville,NC USA Posts: 456	Dual quad, I measured the dimension you gave. I got 1.150. This was holding a straight edge and using calipers,(and being anxious). I now know what I have. You were right, 4 series. I appreciate the help from you and Fast68!!!! 72chevyLWB, looks like I'll keep it... Stepside __________________ :thud 70 sstep tubbed, Muncie, double hump, snowflake,

03-26-2002, 08:13 PM	#11
71GMC 4x4 Registered User Join Date: Mar 2002 Location: Redway,Ca. U.S.A Posts: 37	I agree with Dual Quad, That looks like an Eaton posi unit to me. They come with green springs, I have an eaton unit and it also has Armasteel casted into it. As far as what series I can't help you there. __________________ [IMG]http://mustangmods.com/publish/topless99/truck2.jpg[IMG]

03-26-2002, 08:19 PM	#12
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	that carrier just looks wierd ot me is all, it doesnt look so much like the unit i pulled out of the 72, it had smaller springs, and four of them inside those tow spring plates, and was 72 dated, so,, he gonna keep it now, hehehe good luck!



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